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Message: [QUOTE="sonic blue l, post: 1071026, member: 5185"] Excessive, with that said is the engine at operating temp. I understand what your trying to do is get an idea if you have excessive crankcase pressure, but your not actually doing the test properly. (So I will explain how ford would have or at least should have done the test) as just removing that cap and watching is more of a guess of what appears good or bad with no factual data. Engine at operating temp, calibrated orfice in place of the oil cap, mangahelic gauge measuring the pressure in inches of water, clamp off the crankcase breather (your not eliminating that variable in your testing). Rev engine to 3000 rpm (no load) while monitoring reading on test gauge set. (Mangahelic gauge) That will give you precise readings with an actual reference reading to determine crankcase pressure. [/QUOTE]

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