Thread: Replacing Engine, need help deciding on engine

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  1. #1 Replacing Engine, need help deciding on engine 
    SE Level Member Curt7's Avatar
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    I have a 2003 grand prix GT. Last weekend i replaced the intake gasket, upper plenum and coolant elbows. Everything went well but the problem was the guy who owned it before me put **a lot** of sealant in. WAY too much. Long story short after doing this and attempting to flush the system out the sealant managed to block something off somewhere in the system and i overheated my car. The coolant was legit boiling. Anyways engine is knocking and is fu******d. This means IM basically fu******d. But i work at a dealership so all my buddies are going to help me put an engine in. Now here come the questions. Do i get another regular 3.8? Or do i get a supercharged 3.8? But will a supercharged one fit in? or will it just eventually kill my tranny? I think i will be buying a full grand prix (GT)(P) and swapping the engine and this way i have a car for other parts. Just need to get the minor details figured out and i gotta go for it. I can still drive the car but there are no guarentees to how long she will run for. Thanks guys! Any advice is wanted!
    2003 Grand Prix GT
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  2. #2 Re: Replacing Engine, need help deciding on engine 
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    What part of ontario?

    I vote do it then have will tune it.

    Keep the transmission thats in the car in there.

    Better gearing than the GTP tranny.
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  3. #3 Re: Replacing Engine, need help deciding on engine 
    SE Level Member Curt7's Avatar
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    About 30min from ottawa. Will it fit in no problem than?
    2003 Grand Prix GT
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  4. #4 Re: Replacing Engine, need help deciding on engine 
    GT Level Member Lenny's Avatar
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    swap in an LS7
    2007 Grand Prix GXP

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  5. #5 Re: Replacing Engine, need help deciding on engine 
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    Some connectors might be different.

    So i'd suggest getting the harness with it.

    Unfortunately I don't know anyone who can tune around there.

    So you'll probably want to swap the transmission, PCM, harness and passengers side axle all in one go.
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  6. #6 Re: Replacing Engine, need help deciding on engine 
    SE Level Member Curt7's Avatar
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    Haha alright. I guess i will just have to see what i can get my hands on and go from there!
    2003 Grand Prix GT
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