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KNOCKING noise

This is a discussion on KNOCKING noise within the Internal Engine forums, part of the LSx Technical Help Section category; when i start my engine, it knocks/taps until oil warms up. is this a comman thing?...

  1. #1
    Junior Member ls1hoon's Avatar
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    2002 Holden Commodore SS

    KNOCKING noise

    when i start my engine, it knocks/taps until oil warms up. is this a comman thing?

  2. #2
    Yo Da Lin The Valley..... astyles's Avatar
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    at idle?

  3. #3
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    probably piston slap........very common..........usually never a problem, just annoying. It get better when then engine is warm because the metal expands.

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    Aw shucks. bluefields88's Avatar
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    2000 Camaro SS #3574 A4

    I heard it's due to the aluminum blocks. has to do with the metal or something? I dunno, I have it tho, not a big deal.

  5. #5
    Yo Da Lin The Valley..... astyles's Avatar
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    mine sounds like a peterbuilt when it really cold

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    black
    it could be lifters or a rod bearing. thats what happen on mine. and no piston slap is not normal man. thats not good.

  7. #7
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    2006 GTO

    uh any knocking is not a good thing unless ist knocking the bottom out of some girl

  8. #8
    Aw shucks. bluefields88's Avatar
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    2000 Camaro SS #3574 A4

    Quote Originally Posted by lawrence View Post
    uh any knocking is not a good thing unless ist knocking the bottom out of some girl
    HEY-O!!!!!!!!!

  9. #9
    Member jmhvenom's Avatar
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    2002 Z28

    Would suggest taking it to a dealer under warrenty but I am thinking thats out of the question in 2007. Hope its already, lots of talk about this awhile ago. I think it was a GM service bulletin.

  10. #10
    386HP 373TQ jwindbigler's Avatar
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    1999 Trans Am 5.7L

    Check all of your exhaust and intake bolts tight. I had a severe valve tapping sound, and it got better when I tightened up the bolts.

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