Mechanics

WHAT MIGHT BE CAUSING LOW COMPRESSION?

2005 Chevrolet Trailblazer • 14,000 miles

I have a 2005 chevy trailblazer that we bought a little over a year ago. We have had to fix misfire in cylinder 4 about 4 times in a year. Recently car stared idling rough, overheating, no pickup, drives terribly slow- had it towed to shop. They said there was a misfire in cylinder 2 and 4. Now they say compression in each cylinder is about 80 and supposed to be (250)if I heard correctly. They say we need a new engine. Do we really? What could cause this low compression in each cylinder and is there some other fix we can do that won't cost thousands? Thanks!
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Cps05
July 31, 2012.




The head gasket is probavbly bad and the head may be warped. This is more than likely due to the overheating incident. Since the top end needs to be re-built, it makes sense to re-build the entire motor.



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