Knocking

Tiny
MAILMAN417
  • MEMBER
  • 2002 PONTIAC GRAND PRIX
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 91,000 MILES
My pontiac grand prix 2002 makes a knock sound on acceleration and deceleration sometimes. Any thoughts on where to start?
Thursday, February 24th, 2011 AT 6:36 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
The first thought is cam bearings. Check to see if you can tell if it is a low end sound from the engine or if it sounds like it is coming from the top. If the top, the cam is my first guess. If a low end knock, it could be rods or main bearings.
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Monday, March 21st, 2011 AT 3:57 AM

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