Question about 2000 GMC Safari

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Noise from top of engine

With the engine running it sounds like marbles from the top of the engine

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  • Anonymous Mar 28, 2014

    Sounds like marbles


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Interesting analogy Could be a lot of things. If engine running fine other than noisy I would pour into the oil 1/2 cup of ATF, (automatic transmission fluid) as being a detergent oil it will free up sticky lifters and clean engine. I put ATF in every time I change my oil. Hope this helps. Pleas rate suggestion so I can see if worth my time helping solve problems... ty

Posted on Feb 26, 2009

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Posted on Jan 02, 2017

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