1999 GMC Sierra It sounds like an exhaust leak at manifold.

Tiny
ORION101
  • MEMBER
  • 1999 GMC SIERRA
  • V8
  • 4WD
  • AUTOMATIC
  • 93,000 MILES
Like air escaping/ ticking sound made from left side of engine only when under a load. No load no noise despite raising rpm's. Mechanic said, they all do that, I think it is a leak from a rusty exhaust manifold gasket. It doesnt have the ticking sound of valves but thats why I'm asking.
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Saturday, August 28th, 2010 AT 12:20 PM

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Tiny
DOCFIXIT
  • EXPERT
Hi
Get a 3 ft. 1/4 inch hose while running hold one end to ear other move around exhaust. When you hit leak you will know. Also look for black streaking at all exhaust connections.
Hope this helps
Thanks for donate
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Saturday, August 28th, 2010 AT 1:13 PM

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