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need help diagnosing noise

This is a discussion on need help diagnosing noise within the General Help forums, part of the LSx Technical Help Section category; any ideas....

  1. #1
    Junior Member ZeroXploit's Avatar
    Join Date
    Mar 2015

    1999 camaro 3.8L

    need help diagnosing noise

    any ideas.

  2. #2
    Super Moderator
    pajeff02's Avatar
    Join Date
    Feb 2009
    Mansfield, PA

    Black & Blue
    '02 WS.6 / '07 Suburban

    If it was a V8, I'd say that the secondary air system check valve was blown out and the hose had come off. So tough to tell - it has a higher pitch to the noise than a rod knock. Sounds like a metal scrape combined with a bad exhaust leak.

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