Hey guys i have a 03 grand prix with the 3.1 and the headgaskets went out so i was going to get my motor rebuilt but i was told to just swap it out with a 3.5? Has anybody ever did this and will it just cause problems down the road? Thanks!
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02-29-2012
Hey guys i have a 03 grand prix with the 3.1 and the headgaskets went out so i was going to get my motor rebuilt but i was told to just swap it out with a 3.5? Has anybody ever did this and will it just cause problems down the road? Thanks!
02-29-2012
itll bolt right up to the tranny and such, the wiring shouldnt be too horribly bad. youll have to tune your PCM so it performs at its best.
03-01-2012
Ok cool. I was just wondering if my check engine light would come on since the motor is newer and also since.computers are so sensitive now days. Think i should do it or just rebuild my 3.1
03-01-2012
3.5 no sir.
maybe a 3.8
03-01-2012
Why not a.3.5? Just wondering. And wouldnt it be quite a job to put a 3.8 in it?
03-01-2012
i think a 3.8 would be the easiest route and worth the hassel.
03-01-2012
it would be a little bit more work to swap a 3.8 in, but a 3500 swap is definitely able.
MMS 3500 swap
disregard the comments on the '96 model year.
3500 Swap Finally Underway, a few questions
a 3.8 would be more worth it.
03-01-2012
^^ Better than the 3100
Yes, 3.5.Originally Posted by Nixon
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