Question about 1999 Pontiac Grand Prix

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Knocking sound by belts

Last year i had the belts and water pump fixed and today driving there was a kncking sound so i pulled over to check it out the sound was coming from over by the belts. I started to finish my drive home and it stopped

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  • Mike Butler
    Mike Butler May 11, 2010

    Does it basically occur when engine (belt) is cold, then once it warms up, goes away, or does it reoccur at random?

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  • Pontiac Master
  • 14,036 Answers

Belt tensioner probably the cause . or water pump bolts to tight.

Posted on Mar 17, 2009

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