1999 Pontiac Grand Prix

Tiny
JORDANT46124
  • MEMBER
  • 1999 PONTIAC GRAND PRIX
  • V8
  • 2WD
  • AUTOMATIC
  • 117,000 MILES
Knocking sound coming from engine with white smoke out the exhaust
Tuesday, August 3rd, 2010 AT 7:17 PM

1 Reply

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
Not good, this would indicate a headgasket problem and damaged main/cam bearings.

Perform a compression test to check headgasket, but if you have a knock, the bearings are damaged.
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Saturday, August 7th, 2010 AT 8:13 AM

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