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HOLDEN V8 ENGINES To RANGE ROVER / LAND ROVER ZF 4-SPEED AUTOMATIC TRANSMISSIONS| Marks 4WD Adaptors manufacture engine conversion kits to allow the fitting of Holden V8 engines to the standard Range Rover / Land Rover 4 and 5-speed transmissions.
These engine conversion kits will also suit Land Rover 109" and 110" wheel base including the Land Rover Defender and the Discovery fitted with the Rover alloy V8 engine. Kits are also available to suit the factory 4-speed automatic transmissions. The front coil springs on the Range Rover / Land Rover will need to be upgraded as the cast iron GM engines are heavier than the alloy Rover V8 engine. The GM V8 engine kit consists of an adaptor plate that bolts to the rear of the engine. The standard Range Rover / Land Rover V8 bellhousing then bolts to the rear of the adaptor plate. The transmission does not need repositioning for this conversion as the GM V8 engine has similar external dimensions as the Range Rover / Land Rover V8 engine. Engine mounting kits are available to suit GM engines. The engine mounts have been designed to bolt to the side of the GM engine and then bolt directly to the original Range Rover V8 pre 1996/ Land Rover V8 pre 1999 engine mounting rubber and chassis bracket. The original chassis mounts do not require relocation. The engine mountings have been designed to give you sufficient legal sump to differential clearance when used with a standard GM rear drop sump. A spigot bush, spigot bush adaptor, bellhousing cover plate and all the required bolts are supplied with the kit. The original GM flywheel and starter motor are used for the conversion. The bellhousing will need to be modified to allow the starter motor nose to clear. EFI Wiring The wiring of an EFI engine can be a daunting task especially if you have no prior experience with electronics. well fear not because Marks 4WD Adaptors have an interface wiring loom which is fitted with the EFI, fan, A/C, fuel pump relays, and fusses along with the original GM plugs that correspond with the engine loom. The few remaining trailing wires are labelled to show you where to connect them. Diagnostic Test Light Commodore V6 and V8 vehicles are fitted with with a diagnostic test light to alert the driver of electronic component failure associated with the engine management system. Marks 4WD Adaptors manufacture a diagnostic test light, switch and loom that can be fitted into any vehicle fitted with a Commodore V6 or V8 engine requiring simple and quick engine management diagnostics. Surge Tank Vehicles previously fitted with carbie engines are commonly being re-powered with Commodore, Chevy, and Oldsmobile EFI V6 and V8 engines. When the vehicle was fitted with a carburettor no problems were experienced as the carbie bowl acted as a reservoir and prevented fuel starvation. Unfortunately EFI engines rely on constant fuel pressure for the injectors to operate properly. In a lot of cases the fuel tanks are not equipped with baffles that prevent fuel starvation when accelerating quickly or climbing steep hills, the fuel supply line in some cases is also to small for the high volume high pressure pump. To over come this problem Marks 4WD Adaptors manufacture a surge tank that is used in conjunction with a low pressure lift pump. The lift pump is mounted on the side of the surge tank, it transfers fuel into the surge tank which holds approximately 1ltr of fuel. When it's full, an over flow pipe caries the excess fuel back to the fuel tank. A 12mm outlet is fitted in the top of the tank allowing unrestricted fuel supply to the high pressure fuel pump, the 12mm outlet is fitted with a pickup tube which is suspended approximately 25mm from the bottom of the surge tank. This allows heavy material and water to be separated from the fuel, a drain plug is fitted for ease of servicing. The return fuel from the engine is plumbed into the top of the surge tank through a separate fitting. The tank is supplied with all fittings, lift pump, mounting bracket, hardware and instructions. Commodore VR and VS engine computers (PCM's) require a security signal from the body control module before the engine can be started. The BCM simulator is programmed to supply the correct security signal allowing the engine to be started. The simulator is programmed to send both VR and VS security codes. The simulator is also equipped with an output to control a relay for the engine cooling fan. This option will only work with VS models. PCM Mem-CalsCommodore VT engine management computers require a stream of data to be sent to them from the body control module, prior to starting the engine. This is part of the vehicles anti theft system. The stream of data required by the PCM is special. Fortunately the input to the PCM can be switched off by changing the program information in the mem-cal. Marks 4WD Adaptors can supply mem-cals on an exchange or out right basis. Vehicle Speed Sensors (VSS) For the Commodore ECM/PCM to function properly and allow the engines emissions to comply with EPA regulations it must acquire a speed signal from the VSS. Marks 4WD Adaptors manufacture a number of VSS units and VSS interfaces to suit most EFI engine and vehicle combinations. Holden 308 V8 Bolt Patterns Holden V8 engines are available with two bellhousing bolt patterns all 253 C.I. engines have the Holden Trimatic bolt pattern. The 308 C.I. engines are available with the Turbo or Trimatic bolt patterns. The 1988 VN and later 304 C.I. and 350 C.I. engines have the Turbo bolt pattern. The bolt patterns are illustrated below. Chevy Turbo bolt pattern. Holden Trimatic bolt pattern. Clutch Options A standard 10.5" GM clutch kit can be used with the Range Rover / Land Rover 4-speed transmission as the clutch spline is the same (10 tooth). A 10.5" GM clutch pressure plate and Rover 5-speed clutch plate can be used with the Range Rover / Land Rover 5-speed transmission. A Range Rover / Land Rover clutch kit can be used but the GM flywheel will need to be re-drilled and taped to accept it. |
HOLDEN ENGINE TO R/R-L/R 4 OR 5-SPEED GEARBOX CONVERSION KITS
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RANGE ROVER / LAND ROVER ZF 4-SPEED AUTOMATIC TRANSMISSIONS
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HOLDEN V8 ENGINES TO RANGE ROVER / LAND ROVER 4 AND 5-SPEED TRANSMISSIONSMarks 4WD Adaptors manufacture a range of engine conversion kits to allow the fitting of Holden V8 engines to the standard Range Rover / Land Rover ZF 4-speed automatic transmission.
The front coil springs on the Range Rover / Land Rover will need to be upgraded as the cast iron GM engines are heavier than the light weight alloy Rover V8 engine.
The GM V8 engine kit consists of an adaptor plate that bolts to the rear of the engine. The standard Range Rover / Land Rover V8 bellhousing then bolts to the rear of the adaptor plate. The transmission does not need repositioning for this conversion as the GM V8 engine has similar external dimensions as the Range Rover / Land Rover V8 engine.
Engine mounting kits are available to suit GM engines. The engine mounts have been designed to bolt to the side of the GM engine and then bolt directly to the original Range Rover V8 pre 1996/ Land Rover V8 pre 1999 engine mount rubber and chassis mount. The original chassis mounts do not require relocation.
The engine mountings have been designed to give you sufficient legal sump to differential clearance when used with a standard GM rear drop sump.
The transmission torque converter is coupled to the flywheel via a crankshaft adaptor. The adaptor has the Rover flex plate bolt pattern and spigot diameter on the transmission end with the GM crankshaft bolt pattern and spigot diameter on the engine end. Note: Late model Range Rovers from 1996 could have a different flex plate bolt pattern and may need to be replaced with one from an earlier model to enable the use of our kit.
This allows the Rover flex plate and torque converter to be bolted to the rear of the crankshaft adaptor, same as the old Rover V8 engine. On the front of the crankshaft adaptor a flywheel is used instead of a flex plate, as there is no provision to support a flex plate when the starter motor is engaging.
As the original GM flywheel and starter motor are used for the conversion. The bellhousing will need to be modified to allow the starter motor nose to clear.
EFI Wiring
The wiring of an EFI engine can be a daunting task especially if you have no prior experience with electronics. well fear not because Marks 4WD Adaptors have an interface wiring loom which is fitted with the EFI, fan, A/C, fuel pump relays, and fusses along with the original GM plugs that correspond with the engine loom. The few remaining trailing wires are labelled to show you where to connect them.
Tachometer Interface
The standard Toyota petrol tachometer will not operate directly from the V8 ignition system. Marks 4WD Adaptors manufacture an interface for the V8 petrol engine that will make operative the original 4-cylinder tachometer.
At the present time no tacho interface is available for the Diesel Toyota tachometer.
Diagnostic Test Light
Commodore V6 and V8 vehicles are fitted with with a diagnostic test light to alert the driver of electronic component failure associated with the engine management system. Marks 4WD Adaptors manufacture a diagnostic test light, switch and loom that can be fitted into any vehicle fitted with a Commodore V6 or V8 engine requiring simple and quick engine management diagnostics.
Surge Tank
Vehicles previously fitted with carbie engines are commonly being re-powered with Commodore, Chevy, and Oldsmobile EFI V6 and V8 engines. When the vehicle was fitted with a carburettor no problems were experienced as the carbie bowl acted as a reservoir and prevented fuel starvation. Unfortunately EFI engines rely on constant fuel pressure for the injectors to operate properly. In a lot of cases the fuel tanks are not equipped with baffles that prevent fuel starvation when accelerating quickly or climbing steep hills, the fuel supply line in some cases is also to small for the high volume high pressure pump.
To over come this problem Marks 4WD Adaptors manufacture a surge tank that is used in conjunction with a low pressure lift pump. The lift pump is mounted on the side of the surge tank, it transfers fuel into the surge tank which holds approximately 1ltr of fuel. When it's full, an over flow pipe caries the excess fuel back to the fuel tank.
A 12mm outlet is fitted in the top of the tank allowing unrestricted fuel supply to the high pressure fuel pump, the 12mm outlet is fitted with a pickup tube which is suspended approximately 25mm from the bottom of the surge tank. This allows heavy material and water to be separated from the fuel, a drain plug is fitted for ease of servicing. The return fuel from the engine is plumbed into the top of the surge tank through a separate fitting.
The tank is supplied with all fittings, lift pump, mounting bracket, hardware and instructions.
Commodore VR and VS engine computers (PCM's) require a security signal from the body control module before the engine can be started. The BCM simulator is programmed to supply the correct security signal allowing the engine to be started.
The simulator is programmed to send both VR and VS security codes.
The simulator is also equipped with an output to control a relay for the engine cooling fan. This option will only work with VS models.
PCM Mem-CalsCommodore VT engine management computers require a stream of data to be sent to them from the body control module, prior to starting the engine. This is part of the vehicles anti theft system. The stream of data required by the PCM is special. Fortunately the input to the PCM can be switched off by changing the program information in the mem-cal. Marks 4WD Adaptors can supply mem-cals on an exchange or out right basis.
Vehicle Speed Sensors (VSS)
For the Commodore ECM/PCM to function properly and allow the engines emissions to comply with EPA regulations it must acquire a speed signal from the VSS. Marks 4WD Adaptors manufacture a number of VSS units and VSS interfaces to suit most EFI engine and vehicle combinations.
Holden 308 V8 Bolt Patterns
Holden V8 engines are available with two bellhousing bolt patterns all 253 C.I. engines have the Holden Trimatic bolt pattern.
The 308 C.I. engines are available with the Turbo or Trimatic bolt patterns.
The 1988 VN and later 304 C.I. and 350 C.I. engines have the Turbo bolt pattern.
The bolt patterns are illustrated below.
Chevy Turbo bolt pattern. Holden Trimatic bolt pattern.
HOLDEN V8 ENGINE TO ZF 4-SPEED AUTOMATIC CONVERSION KITS
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Marks 4WD Adaptors 
Last modified:
July 24, 2008
