Compressed Air + Cylinder = Pop! No Compression
11-26-2006, 09:09 PM
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Compressed Air + Cylinder = Pop! No Compression My brother and I are doing a valve spring swap on an engine outside of the car, and used the air compressor method to hold the valves up. It worked well on all cylinders, but cylinder 1 we did last, we used less than 80PSI. All that I can think of is the valve was leaking and build up pressure since we had a long pause before doing that cylinder last. We heard a loud pop, and air leaks out nonstop into the engine somewhere. What could have happened so we have an idea how bad we are screwed. Thanks
11-26-2006, 09:15 PM
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80 psi is no where near enough pressure to damage anything in the cylinder or combustion chamber. maybe there is a bent valve on that cylinder, see if you can tell if the air is coming out the intake, or going into the exhaust. if it's not going in one of those places it's got to be going past the rings.
11-26-2006, 11:00 PM
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Originally Posted by blkbird
Are you sure the valve didnt just open up while compressing the spring? I had that happen to me a couple of times...
