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View Full Version : GQ 4.2L petrol to diesel conversion query



mtbrider4life
23rd April 2013, 09:44 PM
Gday, Im just curious. Is it a straight bolt up job if you have a GQ with a 4.2L petrol in it and you want to take that out and put a 4.2L diesel engine in ?

Dales300exc
23rd April 2013, 09:52 PM
Ive just purchased and engine to build up and transplant.

Bellhousing is different on the diesel, three bolt starter hole instead of two, but i believe people have modified their petrol ones before. I bought a complete engine and trans.

Dash cluster is different and tacho wont work on a petrol cluster (from the research ive done).

Radiator is different.

Engine will bolt straight in depending on mount style (there are two different styles) but can be changed to suit i believe.

Wiring modifications.

Im sure im missing stuff but until i build my engine and undertake the task (plus do more research) i cant be sure.

So far i have a complete engine/trans and a diesel cluster that i dont really like. Think its a pov pack one.

Bloodyaussie
23rd April 2013, 09:53 PM
Is your one carb or efi??

Carb model is pretty straight forward but injected model is a bit more stuffing around....

Rossco has done this conversion and did it over a couple of weeks with most of it done during the weekends..

happygu
24th April 2013, 06:45 PM
It would end up cheaper to change the truck rather than change the motor.

If you are up for the challenge though.......go for it, but it will cost you......

Mic