Engine replacement [Archive] - GrandAmGT.com Forum


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04-17-2005, 04:08 PM
I have a 99 Grand Am GT with the 3.4 liter. I'm in the process of swaping the engine out and ran into a 2003 3.4 liter from an alero. I know that it is the same engine, but will the 2003 engine fit in my 1999 Grand Am? Any replies welcome and thank you ahead of time.

04-18-2005, 06:27 PM
Basicly, they are the same except for a few minor things. The upper intake manifold has 10 bolts in it I think on the 99. The 03 has 6. The alternator has a different mounting. The EVAP purge valve is mounted behind the coil packs on the 99 and on the 03 it is mounted right in front of the EGR valve. Both engines are rated at the same hp, 170. I am pretty sure you can make the 03 work with very little modification.