Thread: Noisy Idle/Coolant leak

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  1. #1 Re: Noisy Idle/Coolant leak 
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    I have a similar problem with my '98 GTP. The sound is loudest for the first minute after start up and then it almost goes any. It is loudest near the #5 cylinder exhaust manifold.
    Have you found a solution yet?
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  2. #2 Re: Noisy Idle/Coolant leak 
    GrandPrix Junkie
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    Is there any signs of coolant in the oil? Should look like a milkshake. Check the underside of the oil fill cap as well.

    Sounds like your leaking coolant around the TB due to the UIM being warped/cracked. If you haven't replaced the LIM gaskets it would be a good time to do that as well to avoid future issues. ineedparts.com sells a good kit for the UIM that includes everthing you would need to do the work. Been running mine for over a year and no issues.
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