2001 GMC Sierra Exhaust Leak

2001 GMC SIERRA
60,000 MILES • V8 • 2WD • AUTOMATIC
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FISHERMAN49
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  • 2 POSTS
It sounds as if there is an exhaust leak when I first start the engine but then the noise quietens as the engine heats up. I read online that there has been a problem with the exhaust manifold bolts and wondered if this was the cause of the noise.
Feb 28, 2009 at 10:50 PM
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MHPAUTOS
  • ✓ASE Certified Mechanic
  • 31,937 POSTS
  • ASE Certified Mechanic
HI there,

Remove any heat shields from the exhaust manifolds, check foe black carbon stains, start up and use a length of hose as a stethoscope and listen around all bolts and flanges and gaskets, if there is a leak this will pick it up easily, start here.

mark (mhpautos)
Feb 28, 2009 at 11:06 PM
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