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Mitsubishi Engine Info

COMMODORE V6 & OLDSMOBILE 3.8 LTR EFI V6

ENGINE & AUTOMATIC TO

MITSUBISHI PAJERO

Marks 4WD Adaptors have developed a conversion kit that allows the installation of the Holden Commodore V6 or Oldsmobile 3.8Ltr EFI V6 engine.

The kit is designed to replace the Mitsubishi 2.6 litre, 4- cylinder petrol engine (carby model), as well as the 2.5 litre 4 cylinder diesel engine.

The kit is designed to allow the GM V6 engine and (TH700R-4) 4 speed automatic transmission to be fitted to the original transfer case.

The adaptors have been designed to allow adequate firewall clearance therefore eliminating the need to move the transfer case or modify drive shafts.

The Mitsubishi Pajero engine mounting kit (Part No. MFK790) enables the use of the standard GM engine bracket located on the left side of the engine. This design allows the use of the standard GM air conditioning compressor if required.

A special engine sump will need to be fabricated to allow the fitting of the Commodore V6 engine into the Mitsubishi Pajero.

Comprehensive fitting instructions are also supplied as part of the kit along with excellent technical backup support if required.

 
COMMODORE V6 ENGINE REQUIREMENTS

You will need to obtain the following components.

The Commodore V6 engine, complete with the main engine wiring harness, the ECM computer and memcal. Other accessories such as the map sensor, purge canister, air cleaner and ducting, air conditioning compressor and power steering pump, engine pipes and catalytic converter, external fuel pump and damper.

The standard Commodore in tank, fuel pump cannot be used. We recommend you use an external EFI Commodore V6/V8 pump (GM part number 92017845), damper (GM part number 90067820) and the rubber insulating sleeve that slides over the fuel pump (GM part number 9292730).

Electric fan

The Commodore V6 does not have an engine driven fan. The Commodore electric fan and shroud will not fit in the Mitsubishi engine bay. An electric fan is required, we recommend using a Davis Craig DC16 or similar.

For details see Holden V6 parts.

LS1/GEN3 & LS2/GEN4

These engines can be fitted in conjunction with the GM 4 speed automatics by using our auto adaptor kits to the Mitsubishi transfer case, as listed below.

Other conversion parts are available - please call for assistance.

FLYWHEELS

Most Commodore V6 vehicles where fitted with automatic transmissions as a result few second hand engines are fitted with flywheels. However all of these engines fitted with automatic transmissions usually come with a flex plate which is fitted with the starter ring gear and engine balance weight. Marks 4WD Adaptors now manufacture a flywheel that bolts up behind the automatic flex plate thereby retaining the ring gear and the original engine balance.

These photos show one of our VS flywheels fitted to a flex plate. Photo 1, Photo 2.

STARTER MOTOR

When fitting the Commodore V6 to a manual transmission a manual starter motor must be used. The starter motor for the automatic can be identified as having a nose housing around the pinion gear. The manual starter motor is manufactured by Delco and only has the pinion gear protruding.

Marks 4WD Adaptors now manufacture manual starter motors. This manual starter motor has been designed to use the original automatic starter motor mounting bolts to secure it to the engine block.

These photos show Marks 4WD Adaptors manual starters and some automatic starters.

 

INTERFACE WIRING LOOM KITS:

Marks 4WD Adaptors manufacture this universal interface wiring loom kit to allow the fitting of Commodore V6 and V8 EFI engines to any vehicle.  

The wiring of an EFI engine can be a daunting task    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.    Wiring Loom Kit  

DIAGNOSTIC TEST LIGHTS

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.

FUEL AND BRACKET KITS

Marks 4WD Adaptors manufacture these fuel and bracket kits for Holden Commodore, Chevy, Nissan, Toyota and Ford V6 and V8 EFI engines to enable them to be fitted into any vehicle.

NOTE: If your vehicle was originally fitted with a carburettor engine then your fuel tank and supply lines will not suit an EFI fuel pump without the use of a surge tank. The purpose of the surge tank is to prevent the High Pressure Fuel Pump from sucking air or cavitation from lack of fuel flow through undersized intake lines. If the High pressure pump sucks air or cavitates, premature wear will result causing the output pressure to drop, reducing performance or stopping the engine from running, seizing the pump is also possible. For surge tank info click here.

 

SURGE TANK

Vehicles previously fitted with carbie engines are commonly being re-powered with Commodore, Chevy, and Oldsmobile EFI V6 and V8 petrol engines.  Chevy diesel engines are also commonly fitted and are also effected by the following. 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, cornering quickly or climbing steep hills, the fuel supply line in some cases is also to small for the high volume high pressure pump, this causes cavitations in the 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.

This photo shows a surge tank fitted to a Hilux chassis rail. Note the low pressure lift pump bolted to the bracket on the side of the surge tank.

 

 

MEM-CALS

Marks 4WD Adaptors stock Commodore V6 and V8 EFI engine mem-cals that have been re-programmed to ignore the anti-theft input signal.
 
Commodore 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 ECM/PCM is a special. Fortunately the input to the ECM/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.

BODY CONTROL SIMULATOR

Marks 4WD Adaptors now manufacture a Commodore body control simulator that suits V6 and V8 EFI PCM's.
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.

 














 



 

 

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