Thread: overheating - loss of power

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  1. #1 Re: overheating - loss of power 
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    Quote Originally Posted by grand prix newb View Post
    I found out where brackets go:
    I just brought front head in and had it worked on, machinest called and said head is ready $50.00 so I am asuming that the 80 psi reading was from a leaking head gasket and not a valve prob for that price/Allthough he has done other heads/flywheels/ and sold me clutch's, head gaket kits, and many parts before, so he may have just given me a deal, when I pick head up I will ask what he did to head..
    Turns out #3 valve took a hit was warped a little and need a grind, brought other head in last week and having valve jobs on both, magnufluxed, and ordered all parts to complete project.


    1997 Grand Prix SE 3800 series 2
    No mods yet.
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  2. #2 Re: overheating - loss of power 
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    Sounds like you finally are getting the red dragon back on the road.

    If you need any diagrams for your car, let me know year/model and email address to send it to.
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  3. #3 Re: overheating - loss of power 
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    Quote Originally Posted by JayAz View Post
    Sounds like you finally are getting the red dragon back on the road.

    If you need any diagrams for your car, let me know year/model and email address to send it to.
    Thanks for all the files very helpfull, just got heads and parts back today, but machinist took out all bolts that helped me I dentify front and rear head and where the brackets and everything bolted on, I don't know which exhaust bolt was a bolt that fastens exhaust and had a bracket or something bolted on to it.
    I would send pictures but daughter forgot the cable to download pics.
    Mario


    1997 Grand Prix SE 3800 series 2
    No mods yet.
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  4. #4 Re: overheating - loss of power 
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    Quote Originally Posted by grand prix newb View Post
    Thanks for all the files very helpfull, just got heads and parts back today, but machinist took out all bolts that helped me I dentify front and rear head and where the brackets and everything bolted on, I don't know which exhaust bolt was a bolt that fastens exhaust and had a bracket or something bolted on to it.
    I would send pictures but daughter forgot the cable to download pics.
    Mario
    Well she's moving right along.

    Heads with valve jobs:



    Progress ready for intake install:




    Got the exhaust almost on:



    1997 Grand Prix SE 3800 series 2
    No mods yet.
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  5. #5 Re: overheating - loss of power 
    GrandPrix Junkie
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    Are those the aluminum LIM gaskets? Cause from the pic they look black, like the plastic ones.

    Also, don't forget to put a dab of RTV in all four corners of the end seals for the LIM to block gaskets. I put some under the gasket, and then on top before seating the LIM. Never leaked again.
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  6. #6 Re: overheating - loss of power 
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    Quote Originally Posted by FordMan77 View Post
    Are those the aluminum LIM gaskets? Cause from the pic they look black, like the plastic ones.

    Also, don't forget to put a dab of RTV in all four corners of the end seals for the LIM to block gaskets. I put some under the gasket, and then on top before seating the LIM. Never leaked again.
    shoot I didn't put any on top just across the bottom, suppose I better do that now, dam I wish you caught me last night, been fastened since with thread lock, Thanks a lot though probbobly saved a big head ache down the road, rather pop of and give it a good rtv hit now then have to tare everything apart later, and yes sir they are the plastic gaskets (dam another thing I forgot about).
    Last edited by grand prix newb; 01-17-2011 at 03:14 PM.


    1997 Grand Prix SE 3800 series 2
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  7. #7 Re: overheating - loss of power 
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    I posted 7 minutes after your post that showed "Progress ready for intake install", where you still had the LIM off. Figured you'd see it in time.

    I'm not saying that it will leak if you only sealed the bottom part, just that I've always been told to put some at just the corners on top and bottom of those end seals where the seal meets the head and LIM. As long as the RTV is thick enough on the bottom part you might be ok, your call there.

    Although I wouldn't reinstall plastic LIM gaskets at all. There is a reason GM came up with the updated Alum. ones . I am actually surprised that they still make the plastic version after all the motors that have had this issue.
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