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6G74 1996 DOHC engine replacement compatibility #1105528 04/18/20 08:21 AM
Joined: Apr 2020
Posts: 2
W
Werrason Offline OP
Need a Spot
I reside in Switzerland and need to change the engine of my 1996 Pajero 3.5L 6G74 DOHC (no GDI) with manual transmission based in Central Africa.

This is not an easy undertaking as this model is rare in Africa (compared to the diesel models) and requires that I ship the engine from Europe, which is feasible and inexpensive (as part of shipment in another car).

The engine is impossible to find in Western Europe, but available from one or two sellers in Eastern Europe and possible to ship from there. Here in Europe, only the Pajeros have the 6G74 DOHC engines.

The easiest option for me remains to do a 1:1 swap with a 1994-1996 3.5 L 6G74 DOHC engine to avoid having to make adjustments and costly mistakes during the swap. I can live with the risk of possible problems in the replacement engine. Using a rebuild kit or putting the parts from the replacement engine on the old mount is a last option in cases the attempt to carry out the 1:1 swap fails.

Even after remotely finding a 1994-1996 3.5 L 6G74 DOHC engine, I would like to avoid surprises in terms of compatibility when it comes to the swap that will take place months after buying the engine and far away from Europe.

Therefore, I have the following questions before going ahead and buying the replacement engine:

1. Does the 1994-1996 3.5 L DOHC 6G74 replacement engine have to be from a manual transmission model?

2. Is the current ECU computer compatible with that of the replacement 1994-1996 3.5 L 6G74 DOHC nginee , even if the replacement engine is from a car with automatic transmission (I have a V5M31 manual transmission)? Or do I absolutely have to get the ECU of the replacement engine?

I have researched these questions for some time but have not been able to find any insights. Your help is greatly appreciated.

Best regards,
Werrason

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Re: 6G74 1996 DOHC engine replacement compatibility [Re: Werrason] #1105534 04/23/20 01:38 AM
Joined: Feb 2005
Posts: 7,276
rxinhed Offline
Trail Leader
*****
Welcome the The Wire!

I've played with 6G72 engines and saw no difference between automatic and stick shift with respect to the crank end. On the 4G54, there was a difference in the metal plate between the block and transmission bellhousing. Are the local L200 or Pajero Sport models available with the 6G74?

Re: 6G74 1996 DOHC engine replacement compatibility [Re: Werrason] #1105537 04/23/20 08:19 AM
Joined: Apr 2020
Posts: 2
W
Werrason Offline OP
Need a Spot
Thank you very much for your reply!

If it would only be a matter of a metal plate between the block and transmission bellhousing, do you share my assessment that an improvised solution (taking off or building a metal plate or go without one, as applicable) could do the trick if the automatic engine needs to be connected to the manual transmission?

Interestingly here in Europe, it is only the Pajero that has the 6G74 engine. The L200 only comes in diesel and the Pajero Sport goes up to 3.0 L 6G72. The non-availability of the 6G74 for these vehicle is probably due to the high fuel consumption of gasoline engines in light of high fuel prices. While the 6G72 already has a high consumption, the 6G74 is over the top. Interestingly, the closest model in terms of compatibility in Europe would be the even more exotic Kia Opirus, whose G6CU engine has many of the same parts as the 6G74 but is mounted on a different side and therefore not 1:1 compatible (see https://www.motorreviewer.com/engine.php?engine_id=80 ). I








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