Cat does not use a compression check to diagnose engine problems. They recommend a leak down test. I made a leakdown tester from an air blowgun and 1/4" pipe fittings. Tee in a pressure gauge. Set the cyinder at TDC and put it in gear or lock the engine somehow. Pressurize the cylinder through the injector hole. I used the tip off of a gas compression gauge which fit on a 1/4" pipe nipple. You can easily hold it against 100 psi.
Use your compressor to presurize the cylinder to your max pressure. Shut off the air and see if it will hold. If air leaks try to locate where it is going. Intake or exaust manifold indicates valve. Into crankcase, piston or rings. Or into the dreaded cooling system may mean cracked head.
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Today's Featured Article - My Ford Golden Jubilee - by Troy Estes. This article is about my '53 Ford Jubilee and a story that starts with taking the tractor to my brother's Starter/Alternator Rebuilding shop for a wiring fix. The generator was shot as well as all the wiring. I dropped off the tractor expecting a transformation from a 6 volt to a 12 volt system utilizing the original generator housing, and a total rewiring of the whole tractor. The front end center pin bushing was worn also so I ask that they replace it if they had time. Well, that�s wha
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