My Trailblazer started making a slight knocking.

  • 17,400 MILES

My trailblazer started making a slight knocking sound and my first thought was a spun bearing but I never lost any oil psi. Im thinking now maby a broken piston. It will make a slight nois at idle but at 2000rpm is when you can really here it. Also it seems to be using oil bad. It is all goin out the pipe I believe. What are the chances of this just being somthing simple. The motor is a 4.2 inline 6

Monday, December 17th, 2012 AT 2:31 AM

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