2002 Buick Century noisy at idle only

2002 BUICK CENTURY
89,000 MILES • 6 CYL • FWD • AUTOMATIC
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TENSK456
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When the engine is ideling, I hear a noise similar to a slapping noise. When the RPM increases, the noice is gone. The performance of the engine is great. It almost sound as if perhaps the timing chain may be slapping or rubbing?
Aug 31, 2010 at 8:28 AM
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WRENCHTECH
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Take a piece of chalk or crayon and go to the harmonic balancer and draw a line from the center bolt, all the way to the outside edge. Start the car for a second and re-examine the line and see if the line is broken to indicate a broken harmonic balancer.
Aug 31, 2010 at 9:21 AM
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TENSK456
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I checked the harmonic balancer with a chalk line and did not notice any movement. Any other possibilities?
Aug 31, 2010 at 11:36 AM
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WRENCHTECH
  • ✓ASE Certified Mechanic
  • 20,761 POSTS
  • ASE Certified Mechanic
There are plenty of other possibilities but you're going to have to determine where the noise is originating from.
Aug 31, 2010 at 11:53 AM
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