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6th Gen ('00-'05): Is engine swap

Old 03-31-2018, 12:04 AM
Thread Starter
Join Date: Mar 2018
Posts: 1
Default Is engine swap

Hi i got a 04 monte ls 3400 and my transmission went out so i am thinking of swapping my 3400 engine for a 3800 with please can anyone let me know if its possible
Old 03-31-2018, 06:36 AM
Join Date: Nov 2017
Location: Isanti, MN
Posts: 828

Sure it's possible you need a new wiring harness and computer probably have to change gas lines and need some of the exhaust from the 3.8 along with new coolant hoses., the complete aiir intake system , different motor mounts and alternator. The Ac system will probably be different. Would imagine that I'm forgetting a few things but thinking your changing engines for more power . Cheap and easier way would be with a shot of nitrous oxide.
Old 03-31-2018, 06:36 AM
Join Date: Oct 2009
Location: around cal city,il
Posts: 3,141

Yes very possible and actually quite common.. You only need a few pieces out of the 3800 car other than the engine.. The wire harness, get it tuned, and the MAP sensor to read boost..

Theres plenty of guides around here im sure also..

This guy is probably one of the better known for doing this swap..

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