Thread: Will a 2005 3.8 go into my 2004 3.8 car with no problem?

Will a 2005 3.8 go into my 2004 3.8 car with no problem?

I was on car-part.com and when I pulled up the screen looking for a motor it was only showing 2004 motors to replace 2004 car. Usually if there are interchangeable years it will pop up 2005 2006 motors to so i wasnt sure if there is maybe a small difference somewhere

Originally Posted by keatonregal

yes

Well my car is actually a 2004 supercharged GTP car but I got a line on a super low miles 2005 non Supercharged 3.8 but i was gonna do a top swap on it then put it in my 2004 car

Originally Posted by ScottyDoggs

its the same engine. as long as its the same n/a or s/c engine. swapping to a sc engine is a bit more work due to the tune it needs.

The motor is coming out of a 2005 Grand prix and I am wanting to do a top swap and then put it in my 2004 GTP car. I know that the compression is different in a non S/C engine but I read most guys do the swap for more horsepower and it shouldnt affect it having higher compression. It just my daily i dont race it or anything lol

Originally Posted by buck531

Depends on what your swapping the motor into. Say if it's Regal or Impala, then no, it won't just drop in and work. If it's a GP then it depends on if it's NA or S/C.

Did you just mail in the computer for a tune? What did it cost you?

Originally Posted by ScottyDoggs

your still gonna want a tune for that. and you'll want to add headers too.

your thinking of doing what i just a did, its called a bottom swap. makes the car feel better then the old engine. more pep for sure.