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Metalic knocking noise

This is a discussion on Metalic knocking noise within the General Help forums, part of the LSx Technical Help Section category; My father-inlaws 5.3 tahoe has this metalic sounding knock. Doesn't matter warm or cold and increases with RPM. Pulled valvecovers ...

  1. #1
    Junior Member Nasty's Avatar
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    Metalic knocking noise

    My father-inlaws 5.3 tahoe has this metalic sounding knock. Doesn't matter warm or cold and increases with RPM. Pulled valvecovers timing cover and all looks ok. Only thing I noticed is that the timing chain and gears looked dry. Like no oil on them. Kinda lost were to go next. Any ideas ? Forgot to add tried cancelling cyclinders to change it . No change. Also has great oil pressure. Changed oil went away for a little bit . He drove it from Ohio to South Carolina ,when he got back started making noises again.
    Last edited by Nasty; 05-13-2012 at 04:38 PM. Reason: Forgot some info.

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    Spaz is My Mentor SMWS6TA's Avatar
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    If I was a betting man I would say you have an oil pump failure and the noise is from a spun bearing.

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    Smiles for 9.5 Years cammed goat's Avatar
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    ^^this.

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