Hi there, low compression can be cause by faulty rings, burnt valves, blown head gasket, best you get a wet compression test done and report the wet and dry readings, a wet test is with about 2 teaspoons of oil in the cylinder, this seals up the rings and if comp is still low the problem will be in the gasket or valves, start here.
Mark (mhpautos)
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Monday, June 14th, 2010 AT 4:22 AM