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2002 Chevy Trailblazer Exhaust Leak vs. Lifter Knocking

Tiny
PATRICK_BRIAN
  • MEMBER
  • 2002 CHEVROLET TRAILBLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 100,000 MILES
I have what appears to be either an exhaust leak or a lifter knocking. I had our mechanic at my plant listen to it and he believes it is an exhaust leak because as the truck warms up, the ticking sound gets quieter. How hard is it to change an exhaust manifold gasket on this vehicle since that would be the cheapest route to try first and what steps does this entail.

Also the cruise control on this vehicle will not engage. Checked all the fuses and they are good. Would this be the switch or is there something else that could be wrong.
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Sunday, March 15th, 2009 AT 9:30 AM

1 Reply

Tiny
BRIAN 1
  • MECHANIC
  • 1,030 POSTS
Actually its the exhaust manifold leaking, very common problem.I've changed alot of these. Its not hard changing it, whats a pain is most of the exhaust manifold bolts break off in the cylinderhead. I have not had one yet that didnt break at least 2. Then they have to be drilled out and heli-coiled. Post back with any other questions.
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Sunday, March 15th, 2009 AT 3:40 PM

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