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  1. #1
    Jr. Apprentice
    Join Date
    Jan 2010
    baton rouge La

    Default knocking sounds are scary

    today when i parked my truck i heard this knocking sound and automatically popped the hood thinnking i threw a rod but the engine was sounding fine but when i reved it up alittle it sounded as if it was coming from the exhaust... not sure what it could be
    1993 yukon on a six inch bds with 18 inch rockstars a 5 speed hella lights with a daystar light bar with an alpine x001 and custom exhaust

  2. #2

    Cool knocking sounds are scary

    Could be the cat. When it cools hit it with your hand and see if it rattles.

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