ZZ632 Deluxe Engine Specifications
Specifications Part Number 19432058
Thank you for choosing Chevrolet Performance as your high performance source. Chevrolet Performance is committed to providing
proven, innovative performance technology that is truly…. more than just power. Chevrolet Performance parts are engineered,
developed, and tested by the factory to exceed your expectations for fit and function. Please refer to our catalog for the Chevrolet
Performance Parts Authorized Center nearest you or visit our website at www.chevroletperformance.com.
This publication provides general information on components and procedures which may be useful when installing or servicing a
ZZ632 Deluxe engine. Please read this entire publication before starting work. Also, please verify that all of the components listed in
the Package Contents section below were shipped in the kit.
The information below is divided into the following sections: Package contents, Component information, Installation instructions,
torque specs, and additional parts that may need to be purchased.
The ZZ632 engine is manufactured on current production tooling; consequently, you may encounter dissimilarities between the
ZZ632 engine assembly and previous versions of the big block V-8. In general, items such as motor mounts can be transferred to a
ZZ632 when it is installed in a vehicle originally equipped with a big block V-8 engine. However, as noted in the following sections,
there are major differences between a ZZ632 engine and an older big block V-8 engine. These differences may require modifications
or additional components not included with the ZZ632 engine. When installing a ZZ632 engine in a vehicle not originally equipped
with a big block V-8, it may be necessary to adapt or fabricate various components for the cooling, fuel, electrical, and exhaust
systems.
The ZZ632 Deluxe crate engine arrives equipped with an engine control system and harness which are also available from your
Chevrolet Performance Parts dealer. Generally, the fuel system requirement is 58 psi (400 kPa) constant fuel pressure. The control
system has been specifically tuned to deliver around 1000 horsepower while running on fuel with a minimum octane rating of 93
(R+M/2). Any changes made to the control system, especially changes made to the tuning or calibration of the control system can
lead to engine damage and will void the warranty. This engine is should not be used for sustained high rpm/high load use such as
marine or towing applications.
It is not the intent of these specifications to replace the comprehensive and detailed service practices explained in the factory
service manuals.
For information about warranty coverage, please contact your local Chevy Performance Parts dealer.
Observe all safety precautions and warnings in the service manuals when installing this package in any vehicle. Wear eye protection
and appropriate protective clothing. Support the vehicle securely with jack stands when working under or around it. Use only the
proper tools. Exercise extreme caution when working with flammable, corrosive, hazardous liquids, and materials. Some procedures
require special equipment and skills. If you do not have the appropriate training, expertise, and tools to perform any part of this
conversion safely, this work should be done by a professional.
The information contained in this publication is presented without any warranty. All the risk for its use is entirely assumed by the
user. Specific component design, mechanical procedures, and the qualifications of individual readers are beyond the control of the
publisher, and therefore the publisher disclaims all liability incurred in connection with the use of the information provided in this
publication.
Chevrolet, the Chevrolet Bow Tie Emblem, General Motors, and GM are all registered trademarks of the General Motors
Corporation. Chevy is a trademark of the General Motors Corporation.
ZZ632 Deluxe Engine
ALL INFORMATION WITHIN ABOVE
BORDER TO BE PRINTED EXACTLY
AS SHOWN ON 8.5 x 11 WHITE 16
POUND NON-BOND RECYCLABLE
PAPER. PRINT ON BOTH SIDES,
EXCLUDING TEMPLATES. TO BE
UNITIZED IN ACCORDANCE WITH
GMCCA SPECIFICATIONS.
Date
03JA22
IR 03AU20
Revision
Init Rel – Alin Dragoiu
Auth
NA
PART No.
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1 of 14
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PART No.
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Legal and Emissions Information
This publication is intended to provide information about the ZZ632 Deluxe engine and related components. This manual also
describes procedures and modifications that may be useful during the installation of a ZZ632 Deluxe engine. It is not intended to
replace the comprehensive service manuals and parts catalogs which cover General Motors engines and components. Rather, it is
designed to provide supplemental information in areas of interest to “do-it-yourself” enthusiasts and mechanics.
This publication pertains to engines and vehicles which are used off the public highways except where specifically noted otherwise.
Federal law restricts the removal of any part of a federally required emission control system on motor vehicles. Further, many states
have enacted laws which prohibit tampering with or modifying any required emission or noise control system. Vehicles which are
not operated on public highways are generally exempt from most regulations, as are some special interest and pre-emission
vehicles. The reader is strongly urged to check all applicable local and state laws.
Many of the parts described or listed in this manual are merchandised for off-highway application only, and are tagged with the
“Special Parts Notice” reproduced here:
Special Parts Notice
This part has been specifically designed for Off-Highway application only. Since the installation of this part may either impair your
vehicle’s emission control performance or be uncertified under current Motor Vehicle Safety Standards, it should not be installed in
a vehicle used on any street or highway. Additionally, any such application could adversely affect the warranty coverage of such an
on-street or highway vehicle.
Chevrolet, Chevy, the Chevrolet Bow Tie Emblem, General Motors, and GM are all registered trademarks of the General Motors LLC.
Package Contents:
Item
Description
1
Engine Assembly
2
Deluxe Engine Instructions
Quantity
1
1
Component Information:
Cylinder Heads:
The ZZ632 engine is assembled with big block RSX cylinder heads. These fully CNC machined cylinder heads have raised intake and
exhaust ports, revised valve angles, 71cc combustion chambers, and are a symmetrical port design. The RSX head is designed to
work with a separate valley tray and accepts a dry intake manifold. The exhaust bolt pattern is standard big block Chevy however the
raised ports may require custom headers. These heads have 2.450” intake valves and 1.800” exhaust valves with a shaft mounted
rockers utilizing a separate rocker bar. A tall valve cover must be used to clear the valvetrain. The heads are machined to accept FKM
(sometimes referred to as Vitontm) o-rings for sealing ports and water openings. Intake ports accept 2-147 o-rings and water
openings accept 2-130. A strip of 3/32 nominal (.103” diameter) FKM o-ring material seals the valley tray to the head.
Intake Manifold:
This ZZ632 Deluxe engine comes with a Chevy Performance Parts single plane intake manifold part number 19366614 designed for
use with symmetrical RSX intake ports and a separate valley tray. This intake manifold was designed to use a standard Holley
Dominator bolt pattern, but the flange opening is increased to accommodate a large bore throttle butterfly. The manifold is
machined for fuel rails, individual injectors, and TMAP (temperature and manifold pressure) sensor. There are no provisions for
external vacuum ports as the engine produces very little (around 6.5 inHg) vacuum at idle. It is considered a “dry” manifold and can
easily be removed/replaced while leaving the cooling system intact.
Note: The engine may not produce adequate vacuum to ensure proper operation of power brakes under all conditions. Several
different electric vacuum pump configurations are available and can be used to provide an additional vacuum source.
ZZ632 Deluxe Engine
ALL INFORMATION WITHIN ABOVE
BORDER TO BE PRINTED EXACTLY
AS SHOWN ON 8.5 x 11 WHITE 16
POUND NON-BOND RECYCLABLE
PAPER. PRINT ON BOTH SIDES,
EXCLUDING TEMPLATES. TO BE
UNITIZED IN ACCORDANCE WITH
GMCCA SPECIFICATIONS.
Date
03JA22
IR 03AU20
Revision
Init Rel – Alin Dragoiu
Auth
NA
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Valley Tray:
The ZZ632 Deluxe engine comes with a Chevy Performance Parts valley tray part number 19366625 designed for use with RSX big
block cylinder heads. The valley tray encloses the valley of the engine, houses the thermostat, and provides a mounting surface for
the 8 individual ignition coils. The water cross over is machined for with two M12 tapped holes. The ZZ632 Deluxe uses one of these
for the coolant temp sensor and other is plugged. The plug may be removed to install a temp sensor for external gauges. There is no
provision for a distributor. If valley tray needs to be removed/replaced, the sealer needs to be completely cleaned from the block
and tray, then washed in solvent. The block requires a final wipe down with rubbing alcohol and the block rails should be sealed with
a bead of Loctite 5900.
Water Pump:
The ZZ632 Deluxe engine comes with a Chevy Performance aluminum water pump part number 19168602. It is a short style pump
with standard rotation. The cooling system has a 180 deg F thermostat. This water pump should not be used with a mechanical
cooling fan or damage to the fan/pump could result. It is recommended that only an electrically driven cooling fan be used.
Ignition System:
The ZZ632 Deluxe engine uses a 58X crank trigger located under the front timing cover. The cam and crank position sensors are
mounted to this timing cover. The harmonic balancer is shortened 3mm to accommodate the width of the trigger wheel. Due to this
configuration a distributor is not required, and the oil pump is driven by a specific oil pump drive, part number 12568356, mounted
in the valley of the engine. The engine control system drives 8 individual coils mounted to the valley tray. Spark plug wires are equal
length and pass around the rear of the engine to the individual plugs. The engine control system monitors many engine parameters
to precisely control the spark timing throughout the range of engine operation. Any changes made to the control system, especially
changes made to the tuning or calibration of the control system can lead to engine damage and will void the warranty.
Oil Pan/Dipstick:
The ZZ632 Deluxe engine has an 8-quart kicked out style oil pan utilizing an internal windage tray. The dipstick tube is a straight 3/8”
diameter tube with a compression fitting style attachment. The tube may need to be bent to clear the exhaust system. The tube
should be bent while removed from the engine using the appropriate bending tool. A bending tool made for 3/8” fuel line will work.
For best results, it is recommended to fill the pan with only 6 to 6.5 quarts of Mobil 1 0W-50 or 15W-50 engine oil. Running a higher
oil level may cause oil aeration, cause a reduction in engine power, and in some cases could damage the engine. The pan should be
filled with oil no higher than the “full” mark. The dipstick must be pushed in until a “click” is heard and felt to be fully seated. If the
dipstick is not fully seated, it may work loose during engine operation.
Fuel Requirements:
Premium unleaded fuel with a minimum octane of 93 (R+M/2) is required with a maximum of 10% ethanol. Leaded fuels or ethanol
fuels with greater than 10% content will cause engine damage.
Fuel Pump:
The ZZ632 Deluxe requires a fuel pump capable of a minimum flow of 125 GPH (470 LPH) at 58 PSI.
ZZ632 Deluxe Engine
ALL INFORMATION WITHIN ABOVE
BORDER TO BE PRINTED EXACTLY
AS SHOWN ON 8.5 x 11 WHITE 16
POUND NON-BOND RECYCLABLE
PAPER. PRINT ON BOTH SIDES,
EXCLUDING TEMPLATES. TO BE
UNITIZED IN ACCORDANCE WITH
GMCCA SPECIFICATIONS.
Date
03JA22
IR 03AU20
Revision
Init Rel – Alin Dragoiu
Auth
NA
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Flywheel / Flexplate:
The ZZ632 does not come with a flywheel or flexplate. The ZZ632 is an internally balanced engine and the following
flywheels/flexplates are available to purchase through Chevrolet Performance Parts catalog:
ZZ632 Manual Transmission Flywheels
Part#
Outside Dia.
Clutch Dia.
12582964
14”
11.5”
ZZ632 Automatic Transmission Flexplates
Part#
Outside Dia.
Conv Bolt Pat.
10185034
Starter Ring
Gear Teeth
14”
168
For internally balanced engines.
Starter Ring
Gear Teeth
10.75/11.5”
Notes
168
Notes
Has dual-converter bolt pattern.
Pilot Bearing:
You must install a pilot bearing in the rear of the crankshaft if the engine will be used with a manual transmission. The pilot bearing
aligns the transmission input shaft with the crankshaft centerline. A worn or misaligned pilot bearing can cause shifting problems
and rapid clutch wear. A roller pilot bearing Part number 14061685 is recommended for this engine. This heavy-duty bearing adds an
extra margin of reliability to a high-performance drivetrain.
Starter:
The ZZ632 Deluxe engine does not include a starter. The starter must be matched to flywheel (or flexplate) diameter when installing
a ZZ632 engine. Small diameter flywheels are 12 3/4” in diameter and have starter ring gears with 153 teeth. Large diameter
flywheels are 14” in diameter and have 168 teeth on the starter ring gear. This difference in flywheel diameters requires two
different starter housings. Starter noses used with 14” diameter flywheels have two offset bolt holes; starters used with 12 3/4”
diameter flywheels have bolt holes that are straight across from each other.
Note: Chevrolet starter motors use special shouldered mounting bolts, which register the starter on the block. The following starters
and hardware can be used with the ZZ632 Deluxe engine:
12361146 - High-Torque Mini Gear Reduction Starter for 12 3/4" and 14" diameter flywheel/flexplate. Kit includes bolts and shims.
(10.5 lb.)
19302919 – Light Weight (LW) starter for 14” diameter flywheel/flexplate (10 lb.)
14037733 - Bolt, starter mounting, inner for 12 3/4” LW starter
12338064 - Bolt, starter mounting, outer for 12 3/4” LW starter; also, for 14” LW starter (2 required)
Air Cleaner:
A foam or paper element, low restriction air cleaner should be used to protect the engine from excessive wear and diffuse the air
entering the throttle body. The fuel mixture distribution can be upset if no diffuser is used, causing poor power and misfiring at high
engine speeds. Always check for adequate hood clearance when installing a new air cleaner. Chevy Performance Parts offers an
orange air cleaner kit part number 19432403 to match the valve covers on the ZZ632.
Headers:
A ZZ632 Deluxe engine can be equipped with a header exhaust system for maximum performance. For performance and limited
competition applications, the recommended header configuration is 2.375” diameter primary pipes, 28 to 30 inches long, with
3.500” diameter collectors.
ZZ632 Deluxe Engine
ALL INFORMATION WITHIN ABOVE
BORDER TO BE PRINTED EXACTLY
AS SHOWN ON 8.5 x 11 WHITE 16
POUND NON-BOND RECYCLABLE
PAPER. PRINT ON BOTH SIDES,
EXCLUDING TEMPLATES. TO BE
UNITIZED IN ACCORDANCE WITH
GMCCA SPECIFICATIONS.
Date
03JA22
IR 03AU20
Revision
Init Rel – Alin Dragoiu
Auth
NA
PART No.
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Wideband Oxygen (O2) Sensor Installation Procedure:
The O2 sensor must be installed in the exhaust system using the supplied O2 sensor bung from the hardware bag. The O2 sensor is
required as it measures the oxygen content of the exhaust gas, which is used by the ECU to manage fuel delivery under closed loop
control.
NOTE: It is suggested that the O2 sensor bung be installed by a professional muffler shop prior to the installation of the ZZ632
Deluxe engine. DO NOT drive the vehicle with the O2 sensor unplugged as this will damage the O2 sensor. An O2 sensor bung plug is
provided for your convenience. Because of harness length constraints, it is highly recommended to install the O2 sensor and the ECU
on the same side of the vehicle.
WARNING: A properly sealed exhaust system is critical for the ZZ632 Deluxe engine to function properly. Any air leaks in the exhaust
system, upstream of the O2 sensor, will skew the O2 sensor's output resulting in improper calibration which can lead to engine
damage.
Verify that the header and tailpipe gaskets and flanges are in good condition. It is recommended to replace any damaged gaskets
and flanges as they may cause exhaust leaks, which can lead to inaccurate Air Fuel Ratio (AFR) readings. Torque all fasteners to
manufacturer’s specifications to avoid any possible exhaust leaks.
WARNING: Be sure any RTV Silicone used to seal the exhaust system is compatible with Oxygen Sensors. This information will be
found on the silicone tube packaging.
WARNING: The Exhaust system must be completely sealed from cylinder head to tailpipe. This is the number one cause of poor
performance as exhaust leaks affect the air/fuel mixture seen by the ECU. Use locking type hardware to secure exhaust headers to
cylinder heads and exhaust collector to mid-pipe. DO NOT USE NYLOC NUTS. Re-torque exhaust hardware on a regular basis to
ensure exhaust leaks do not occur.
The O2 sensor bung must be installed in the exhaust system as close to the engine as possible, after the header collector and before
the catalytic converter (if equipped). This location must be approximately 10° above horizontal and within reach of the O2 sensor
harness connector on the engine main harness. NOTE: There must be at least 24” of exhaust pipe after the O2 sensor. Open headers
or “zoomies” will cause the sensor to read incorrectly.
Mark the drilling location on the exhaust system pipe with a permanent or paint marker. Check the proposed mounting location to
ensure the clearance for the O2 sensor is adequate and that the O2 sensor connector on the main harness will reach the O2 sensor
location. Make sure to take engine movement into consideration when checking for clearance.
Drill a 5/8" hole at your mounting location. Deburr and clean the hole as needed.
Fit the provided bung onto the hole opening. Secure the bung with a clamp and weld the bung in place.
ZZ632 Deluxe Engine
ALL INFORMATION WITHIN ABOVE
BORDER TO BE PRINTED EXACTLY
AS SHOWN ON 8.5 x 11 WHITE 16
POUND NON-BOND RECYCLABLE
PAPER. PRINT ON BOTH SIDES,
EXCLUDING TEMPLATES. TO BE
UNITIZED IN ACCORDANCE WITH
GMCCA SPECIFICATIONS.
Date
03JA22
IR 03AU20
Revision
Init Rel – Alin Dragoiu
Auth
NA
PART No.
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Once the installation of the bung is complete, make sure to clean the threads of the fitting to ensure it's free of debris.
NOTE: The O2 sensor bung uses an M18 x 1.5 thread pitch.
ECU and Wiring Harness Installation
The ZZ632 comes with the engine harness installed and the ECU calibrated/tuned to operate the engine across a wide range. Any
changes made to the control system, especially changes made to the tuning or calibration of the control system can lead to
engine damage and will void the warranty. Battery must be fully charged and in good condition before attempting to crank engine.
In some cases, low cranking voltage may cause ECU to lose the calibration. Ignition switch must be in good working condition. Power
interruptions during cranking may also cause issue.
ECU Mounting:
The ECU can be mounted inside the passenger compartment (preferable location) or in the engine compartment. If mounted in the
engine compartment, follow these guidelines:
• The ECU should be located such that it isn’t being directly hit by water or road debris. It is recommended to mount the ECU
in a location away from excess heat, vibration, and possible water exposure.
• It should also be located such that it isn’t extremely close to exhaust manifolds or headers.
• It should be mounted such that it is as far away from spark plug wires, CD ignition boxes, or other “electrically noisy”
devices as is reasonably possible.
• Make sure the connector end of the ECU is pointed DOWN such that water can’t make its way into the ECU terminals.
Do not over-tighten mounting hardware if the ECU is not mounted on a flat surface.
Important Wiring “Do’s and Don’ts”:
An EFI system depends heavily on being supplied a clean and constant voltage source. The grounds of an electrical system are just as
important as the power side.
The ZZ632 ECU contains multiple processing devices that require clean power and ground sources. The wiring harnesses for them
must be installed in such a manner that they are separated from “dirty” power and ground sources.
DO’S
•
•
Install the main power and ground directly to the battery. To the POSTS/TERMINALS, not to any other place!
Keep sensor wiring away from high voltage or “noisy/dirty” components and wiring, especially secondary ignition wiring
(plug wires), ignition boxes and associated wiring. It is best that the plug wires not physically contact any EFI wires.
Properly crimp or crimp and solder any wire connections. Apply quality heat shrink over any of these connections.
It is critical that the engine has a proper ground connection to the battery and chassis.
•
•
DON’TS
• NEVER run high voltage or “noisy/dirty” wires in parallel (bundle/loom together) with any EFI sensor wiring. If wires need to
cross, try to do so at an angle.
• Do not use the electric fan outputs to directly power a fan. They must only trigger a relay.
• Do not use improper crimping tools.
• Don’t use things like “t-taps”, etc. Use proper crimpers/solder and heat shrink.
• It is never recommended to splice/share signal wires (such as TPS, etc.) between different electronic control units (i.e.
“piggyback”).
• Do not connect the red/white switched +12V wire to “dirty” sources, such as the ignition coil, audio systems, or 12V sources
connected to HID head lamps.
Main Power/Battery Connection
The ZZ632 ECU has a main battery power and ground connector on the right side of the ECU. The right position, Terminal “A” is the
ground (black wire). The black wire should go to the negative post DIRECTLY on the battery. The left position, Terminal “B” is the
ZZ632 Deluxe Engine
ALL INFORMATION WITHIN ABOVE
BORDER TO BE PRINTED EXACTLY
AS SHOWN ON 8.5 x 11 WHITE 16
POUND NON-BOND RECYCLABLE
PAPER. PRINT ON BOTH SIDES,
EXCLUDING TEMPLATES. TO BE
UNITIZED IN ACCORDANCE WITH
GMCCA SPECIFICATIONS.
Date
03JA22
IR 03AU20
Revision
Init Rel – Alin Dragoiu
Auth
NA
PART No.
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positive terminal (red wire). The red wire should go to the positive post DIRECTLY on the battery. If you have a “dual post” battery, it
is a great idea to purchase separate posts/studs to connect the ECU power and ground to the non-used terminals. Always use the
fused power cable with the proper connectors supplied. Don’t connect to the ECU until after ALL wiring and installation is
performed.
ECU Connectors:
The ZZ632 ECU has two main connectors:
• J1A - The first connector next to the USB connector is the “J1A” connector (34 pin). This connector is primarily an “Input”
connector. It contains all the sensor inputs and wide band oxygen sensor control.
• J1B - The second connector is the “J1B” connector (26 pin). This connector is the “output” connector. It has 8 injector
outputs and outputs for other devices.
Harness Routing:
If the ECU is mounted in the interior, it will have to be routed through the firewall into the engine compartment. Use a 2” hole saw
to create a hole in a desired location if no other point of access is available. Use a grommet for a 2” hole to seal this area. Earl’s part
number 29G001ERL is recommended.
Connect the J1A and J1B connectors of the main harness into the ECU.
A 40A Relay is located on the main harness. This powers the injectors and fuel pump. There is also a 20 amp fuse for the injectors
and fuel pump pre-installed in this location.
Loose Wires:
The following loose wires in the main wiring harness should be connected as follows on all systems.
ZZ632 Deluxe Engine
ALL INFORMATION WITHIN ABOVE
BORDER TO BE PRINTED EXACTLY
AS SHOWN ON 8.5 x 11 WHITE 16
POUND NON-BOND RECYCLABLE
PAPER. PRINT ON BOTH SIDES,
EXCLUDING TEMPLATES. TO BE
UNITIZED IN ACCORDANCE WITH
GMCCA SPECIFICATIONS.
Date
03JA22
IR 03AU20
Revision
Init Rel – Alin Dragoiu
Auth
NA
PART No.
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[Required] 12V Switched – Color = Red/White – Should be connected to a clean +12 volt power source. Power source should only
be active when the ignition is on. Make sure source has power when engine is cranking as well (check with voltmeter). Not all
sources apply power when the ignition switch is in “cranking” position. This wire is located approximately 7” from the ECU
connectors. DO NOT connect to a “DIRTY” source like an ignition coil!
[Required] 12V Battery – Color = Red – Should be connected directly to the battery. This powers the fuel pump and fuel injectors.
This wire is protected by a fuse in a sealed fuse holder. The fuse holder is located about 18” from the ECU connector. A fuse is preinstalled (20A).
[Optional] 12V Fuel Pump – Color = Green - Used to directly power a fuel pump (+12 volt). Do not use this wire to power fuel
pumps that require over 15 Amps. Refer to your fuel pump manufacturer for amperage ratings. For high current pumps, use this
wire to trigger a separate relay and use larger gauge wire to feed the pump - 10 gauge is recommended.
[Required] Chassis Ground – Color = Black – Connect to a chassis ground point that has excellent connectivity with both the engine
and battery. There must be good continuity between the connection point and the battery when checked with a digital volt ohm
meter (DVOM). This ground should not be connected at the same location as other grounds.
[Optional] Tach Output – Color = Blue with white stripe – This wire provides a 12v square wave output and can be used to trigger a
conventional tachometer. Note: This loose wire is not present on all harnesses.
Additional Inputs and Outputs:
The base calibration loaded into the ZZ632 ECU is pre-configured with 2 outputs to be used for the following features:
• Electric Fan #1 output (Ground)
• Electric Fan #2 output (Ground)
• Optional output #3
• Optional output #4
The chart below will help identify the proper loose wires necessary for use with the preconfigured inputs/outputs, as well as
additional inputs/outputs that can be configured in the software. These are located in the “Inputs/Outputs” connector. A mating
harness with loose wires is included with the system.
ZZ632 Deluxe Engine
ALL INFORMATION WITHIN ABOVE
BORDER TO BE PRINTED EXACTLY
AS SHOWN ON 8.5 x 11 WHITE 16
POUND NON-BOND RECYCLABLE
PAPER. PRINT ON BOTH SIDES,
EXCLUDING TEMPLATES. TO BE
UNITIZED IN ACCORDANCE WITH
GMCCA SPECIFICATIONS.
Date
03JA22
IR 03AU20
Revision
Init Rel – Alin Dragoiu
Auth
NA
PART No.
SHEET
8 of 14
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Electric Fan #1 output – This output will provide a ground output to trigger a relay used for a cooling fan. This output should never
be directly connected to a fan, but the relay that powers the fan. It should be connected to the ground trigger of the relay. ECU is
configured to turn on at 180 deg F and off at 175 deg F.
Electric Fan #2 output – This output will provide a ground output to trigger a relay used for a cooling fan. This output should never
be directly connected to a fan, but the relay that powers the fan. It should be connected to the ground trigger of the relay. ECU is
configured to turn on at 190 deg F and off at 185 deg F.
Preconfigured Input/Output Wiring
Description
ECU Pin
Connector Pin
Input #1
A12
A
Input #2
A3
B
Input #3
A13
C
Input #4
A4
D
Electric Fan #1 (Output #1)
B12
E
Electric Fan #2 (Output #2)
B11
F
Output #3
B10
G
Output #4
B3
H
Loose Wire Color
White w/ Blue
White w/ Red
White w/ Black
White w/ Green
Gray w/ Yellow
Gray w/ Red
Gray w/ Black
Gray w/ Green
Final ECU Connection:
Once all harnessing has been connected, you may plug in the main power harness (referenced above) to the ECU.
At this point, the installation of your EFI system should be complete. The vehicle should be ready to start and run.
Throttle Position Sensor (TPS):
The TPS is set at the factory with 0% reading when throttle is against the idle adjustment screw and 100% with the throttle opened
against the stop. The ZZ632 control system is equipped with an Idle air control valve (IAC) to control idle speed. No further
adjustment of the idle screw or TPS is necessary. The engine should idle around 1050rpm. Ensure that the throttle linkage allows the
throttle to sit against the adjuster screw and can open the throttle fully to achieve a 100% TPS reading.
Diagnostic LEDs:
ZZ632 Deluxe Engine
ALL INFORMATION WITHIN ABOVE
BORDER TO BE PRINTED EXACTLY
AS SHOWN ON 8.5 x 11 WHITE 16
POUND NON-BOND RECYCLABLE
PAPER. PRINT ON BOTH SIDES,
EXCLUDING TEMPLATES. TO BE
UNITIZED IN ACCORDANCE WITH
GMCCA SPECIFICATIONS.
Date
03JA22
IR 03AU20
Revision
Init Rel – Alin Dragoiu
Auth
NA
PART No.
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Start-up and Break-in Procedures
Safety first. If the vehicle is on the ground, be sure the emergency brake is set, the wheels are chocked, and the car cannot fall into
gear. Verify everything is installed properly and nothing was missed. Engine should be checked for any leaks after the engine is
started.
1. After installing the engine, ensure the crankcase has been filled with motor oil to the recommended oil fill level on the
dipstick(see section Oil Pan/Dipstick above for correct procedure). The engine performs best with around 6 – 6.5 quarts of oil in the
pan and a full oil filter. The ZZ632 can be broken in with synthetic oil. The engine has been validated and performs best with Mobil 1
0W-50 oil. Also check and fill as required any other necessary fluids such as coolant, power steering fluid, etc.
2. The engine should be primed with oil prior to starting. The oil pump is driven by a special oil drive mechanism that is fastened to
the block and covered by the valley tray. As a result, the engine cannot be primed in the conventional big block manner using an
adaptor to spin the oil pump. The use of a pre luber kit such as J 45299 is recommended.
a.) Locate the oil gallery plug on the left side of the engine block above the oil filter housing.
b.) Install the 1/4-18 adapter Part No. 509373
c.) Install the flexible hose to the adapter and open the valve.
d.) Pump the handle on J 45299 to flow a minimum of 1–1.9 L (1–2 qt.) of engine oil. Observe the flow of engine oil through
the flexible hose and into the engine assembly.
e.) Close the valve and remove the flexible hose and adapter from the engine.
f.) Install the gallery plug to the engine. Tighten the oil gallery plug to 30 Nm (22 ft. lb.)
g.) Top-off the engine oil to the proper level.
ZZ632 Deluxe Engine
ALL INFORMATION WITHIN ABOVE
BORDER TO BE PRINTED EXACTLY
AS SHOWN ON 8.5 x 11 WHITE 16
POUND NON-BOND RECYCLABLE
PAPER. PRINT ON BOTH SIDES,
EXCLUDING TEMPLATES. TO BE
UNITIZED IN ACCORDANCE WITH
GMCCA SPECIFICATIONS.
Date
03JA22
IR 03AU20
Revision
Init Rel – Alin Dragoiu
Auth
NA
PART No.
SHEET
10 of 14
19432058
DR
Title Installation Instructions
ZZ632 Deluxe Engine Specifications
PART No.
19417730
SHEET 10 of 14
3. When possible, you should always allow the engine to warm up prior to driving. It is a good practice to allow the oil sump and
water temperature to reach 160 deg F before performing hard acceleration runs.
4. The engine should be driven at varying loads and conditions for the first 30 miles or one hour without wide open throttle (WOT)
or sustained high RPM accelerations.
5. Progressively increased throttle is allowed up to WOT. Do not exceed 4000rpm.
6. Change the oil and filter. Replace with Mobil 1 0W50 motor oil and a 25013454 or PF35L AC Delco oil filter. Inspect the oil and the
oil filter for any foreign particles to ensure that the engine is functioning properly.
7. Drive the next 500 miles under normal conditions or 12 to 15 engine hours. Do not run the engine at its maximum rated engine
speed. Also, do not expose the engine to extended periods of high load.
8. Change the oil and filter. Again, inspect the oil and oil filter for any foreign particles to ensure that the engine is functioning
properly.
ZZ632 Engine Specifications:
Displacement ……………………………………………….……………………… 631.5 in3 (10.35L)
Bore x Stroke ……………………………………………….……………………… 4.600 x 4.750”
Compression ……………………………………………….………………………. 12:1 Nominal
Block ……………………………………………………………….…………………… Cast Iron 10.200” deck
Cylinder Head …………………………………………………….………………… Cast Aluminum RSX Spread Port
Valve Diameter (Intake/Exhaust) ……………………….……………… 2.450”/1.800”, 5/16” stem
Chamber Volume …………………………………………….………………… 71cc Nominal
Crankshaft …………………………………………………………………….………. Forged 4340 Internally Balanced
Connecting Rods ……………………………………………………………………. Forged 4340 with ARP2000 7/16” bolts
Camshaft ………………………………………………………………………………. Hydraulic Roller Tappet
Lift ………………………………………………………………………………....... .780” intake, .782” exhaust
Duration @ .050” ………………………………………………………………. 270o intake, 285o exhaust measured at .050” tappet lift.
Rocker Ratio …………………………………………………………………………. 1.8:1 Aluminum shaft mounted roller tip and fulcrum
Timing Chain …………………………………………………………………………. Double roller
Oil Pan…………………………………………………………………………………… Stamped steel kicked out sump
Oil Pressure (minimum) ………………………………………………………… 11 psig @ 1100 rpm
Recommended Oil ………………………………………………………………… Mobil 1 0W-50
Oil Filter ………………………………………………..………………………………. AC Delco PF35L or 25013454
Valve Lash …………………………………………………………………………….. ½ to ¾ turn down from zero lash
Fuel ……………………………………………………………………………………….. Premium unleaded - 93 (R+M)/2
Maximum Engine Speed ………………………………………………………… 7,000 rpm
Spark Plugs …………………………………………………………………………….. Denso IK27 Iridium
Spark Plug Gap ……………………………………………………………………….. .032” (0.8mm) Pre-gapped
Spark Timing …………………………………………………………………………… ECU controlled
Firing Order ……………………………………………………………………………. 1-8-7-2-6-5-4-3
ZZ632 Deluxe Engine
ALL INFORMATION WITHIN ABOVE
BORDER TO BE PRINTED EXACTLY
AS SHOWN ON 8.5 x 11 WHITE 16
POUND NON-BOND RECYCLABLE
PAPER. PRINT ON BOTH SIDES,
EXCLUDING TEMPLATES. TO BE
UNITIZED IN ACCORDANCE WITH
GMCCA SPECIFICATIONS.
Date
03JA22
IR 03AU20
Revision
Init Rel – Alin Dragoiu
Auth
NA
PART No.
SHEET
11 of 14
19432058
DR
Title Installation Instructions
ZZ632 Deluxe Engine Specifications
PART No.
19417730
SHEET 11 of 14
Information may vary with application. All specifications listed are based on the latest production information available
at the time of printing
ZZ632 Engine Torque Specifications:
Camshaft retainer bolt/screw (Blue Loctite) .................................................................. 10 ft.-lbs. / 14 N·m
Camshaft sprocket bolt/screw (Blue Loctite) ................................................................. 25 ft.-lbs. / 34 N·m
Connecting rod nut (with ARP Lube) .............................................................................. 78 ft.-lbs. / 105 N·m
Crankshaft balancer bolt (Red Loctite) ........................................................................... 110 ft.-lbs. / 149 N·m
Crankshaft bearing cap nuts (with ARP lube)
Inner ............................................................................................................................. 110 ft.-lbs. / 142 N·m
Outer ............................................................................................................................ 105 ft.-lbs. / 142 N·m
Cylinder head bolt /nuts (with ARP lube)
Long studs .................................................................................................................... 75 ft.-lbs. / 102 N·m
Short studs ................................................................................................................... 60 ft.-lbs. / 81 N·m
Valley studs .................................................................................................................. 60 ft.-lbs. / 81 N·m
Engine block oil gallery plug (Teflon sealer) ................................................................... 15 ft.-lbs. / 20 N·m
Engine front cover bolt screw ........................................................................................ 10 ft.-lbs. / 14 N·m
Flywheel bolt/screw (Red Loctite) .................................................................................. 65 ft.-lbs. / 90 N·m
Intake manifold bolt/screw (30w oil) ............................................................................. 18 ft.-lbs. / 25 N·m
Oil filter adapter bolt/screw (Blue Loctite) .................................................................... 18 ft.-lbs. / 25 N·m
Oil pan assembly bolt/screw........................................................................................... 18 ft.-lbs. / 25 N·m
Oil pan drain plug ........................................................................................................... 15 ft.-lbs. / 20 N·m
Oil pump bolt/screw to rear crankshaft bearing cap (Blue Loctite) ............................... 55 ft.-lbs. / 75 N·m
Oil pump cover bolt/screw ..............................................................................................80in.lbs / 9 N·m
Rocker bar bolts (Blue Loctite)
7/16 x 14 bolts(ARP lube under bolt head).................................................................. 65 ft.-lbs. / 88 N·m
5/16 x 18 bolts............................................................................................................. 10 ft.-lbs. / 14 N·m
Rocker shaft bolts (30w oil) ............................................................................................ 25 ft.-lbs. / 34 N·m
Rocker cover bolts .......................................................................................................... 10ft.-lbs. / 14 N·m
Spark plug (30w oil) ........................................................................................................ 18 ft.-lbs. / 25 N·m
Starter motor bolt/screw ................................................................................................ 35 ft.-lbs. / 48 N·m
Valve lifter guide retainer bolt/screw (30w oil) ...............................................................18 ft.-lbs. / 25 N·m
Valley tray bolt/screw ......................................................................................................18 ft.-lbs. / 25 N·m
Water pump bolt/screw................................................................................................... 18 ft.-lbs. / 25 N·m
ZZ632 Deluxe Engine
ALL INFORMATION WITHIN ABOVE
BORDER TO BE PRINTED EXACTLY
AS SHOWN ON 8.5 x 11 WHITE 16
POUND NON-BOND RECYCLABLE
PAPER. PRINT ON BOTH SIDES,
EXCLUDING TEMPLATES. TO BE
UNITIZED IN ACCORDANCE WITH
GMCCA SPECIFICATIONS.
Date
03JA22
IR 03AU20
Revision
Init Rel – Alin Dragoiu
Auth
NA
PART No.
SHEET
12 of 14
19432058
DR
Title Installation Instructions
ZZ632 Deluxe Engine Specifications
PART No.
19417730
SHEET 12 of 14
Rocker Bar: Apply medium (Loctite blue) thread locker to bolt threads. Apply ARP lube under 7/16 bolt head. Start all bolts before
torquing.
ZZ632 Deluxe Engine
ALL INFORMATION WITHIN ABOVE
BORDER TO BE PRINTED EXACTLY
AS SHOWN ON 8.5 x 11 WHITE 16
POUND NON-BOND RECYCLABLE
PAPER. PRINT ON BOTH SIDES,
EXCLUDING TEMPLATES. TO BE
UNITIZED IN ACCORDANCE WITH
GMCCA SPECIFICATIONS.
Date
03JA22
IR 03AU20
Revision
Init Rel – Alin Dragoiu
Auth
NA
PART No.
SHEET
13 of 14
19432058
DR
Title Installation Instructions
ZZ632 Deluxe Engine Specifications
PART No.
19417730
SHEET 13 of 14
Service Parts List:
PART #
19366599
88962212
12499434
19431562
88961556
10101164
10114166
19432392
19366601
19431810
19419903
19431809
19419905
19419906
19432558
19419899
19419898
19366613
19431805
19431806
19421228
19366625
19366614
19418278
10126796
3864814
12608814
19418041
19432875
19432013
19432014
QTY
1
1
1
1
1
1
1
1
8
2
16
16
16
8
8
8
8
2
10
10
16
1
1
1
1
1
1
1
1
1
1
NAME
Block, 632
Bearing kit, CR/SHF
Bearing kit, CM/SHF
Crankshaft
Bearing, Conn Rod Std
Seal Asm, Cr/Shf Rr Oil
Key, Cr/Shf Balr
Rod Asm, Conn
Piston Kit with Pin/rings (Std)
Head Asm, Cyl W/Vlvs
Spring-Vlv
Seal, Vlv Stem Oil
Retainer, Vlv Spr
Lock, Vlv Spr- Intake
Lock, Vlv Spr- Exhaust
Valve-Int
Valve-Exh
Gasket-Cyl Hd
Bolt/Screw-Cyl Hd (Long)
Bolt/Screw-Cyl Hd (Med)
Bolt/Screw-Cyl Hd (Short)
Valley tray
Intake manifold
Balancer Asm-Cr/Shf
Bolt, Balancer
Washer,CR/SHF BALR
Coolant Temp sensor
Valve ASM,idle air control
EFI CONTROL KIT-632
Support ASM, SPK plug wires
Support ASM, SPK plug wires
PART#
12579355
19256786
12591720
12595966
55505514
19338062
19328610
12713668
19370158
19366612
19366604
19366616
25013454
3853870
12568356
19168602
10108470
19432531
19256787
12568790
12568787
19366609
19366610
19421273
19421272
19432401
12551399
12551397
19421390
19366624
QTY
8
1
1
1
1
1
8
8
1
1
1
1
1
1
1
1
1
1
1
1
1
8
8
2
16
16
1
8
1
1
NAME
Wire ASM-IGN Coil
Ring,CR/SHF Posn sen reluctor
Sensor ASM-CM/SHF Posn
Sensor ASM-CR/SHF Posn
TMAP Sensor
Throttle Pos sensor
Spark plugs
Ignition coil
Front/Timing Cover
Pump Asm-Oil
Oil Pan w/ oil level indicator
Gasket-Oil Pan
Oil Filter
Oil filter adaptor
Oil pump drive
Pump Asm-Wat
Outlet-Wat
Camshaft Asm
Sprocket-Cm/Shf
Sprocket-Cr/Shf
Chain-Cm/Shf Timing
Rod Asm-Vlv Push Intake
Rod Asm-Vlv Push Exhaust
Rocker bar
Rocker arm
Lifter, Vlv
Retainer,VLV lifter guide
Guide, VLV lifter
Valve Cover Kit
Throttle body
Part numbers may be superseded and are subject to change. Check with your local dealer.
ZZ632 Deluxe Engine
ALL INFORMATION WITHIN ABOVE
BORDER TO BE PRINTED EXACTLY
AS SHOWN ON 8.5 x 11 WHITE 16
POUND NON-BOND RECYCLABLE
PAPER. PRINT ON BOTH SIDES,
EXCLUDING TEMPLATES. TO BE
UNITIZED IN ACCORDANCE WITH
GMCCA SPECIFICATIONS.
Date
03JA22
IR 03AU20
Revision
Init Rel – Alin Dragoiu
Auth
NA
PART No.
SHEET
14 of 14
19432058
DR
Title Installation Instructions
ZZ632 Deluxe Engine Specifications
PART No.
19417730
SHEET 14 of 14