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Old 06-15-2017, 03:22 PM   #21
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Originally Posted by Ski in NC View Post
For high crankcase flow to be due to piston rings, it would have to be failure of the oil control rings at the bottom of the piston, which I have never seen fail. The compression rings at the top of the piston separate the compression from the airbox. Those do fail and the air flow leaking by then goes into the airbox, not the crankcase.
OK, so bottom line is someone supposedly educated in Detroit 2 strokes declairing they are impressed there is no blow by in my Detroit 2 stroke diesel, is pretty much meaningless, yes ?
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Old 06-15-2017, 03:40 PM   #22
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It's not meaningless for there to be low base pressure/flow, in fact I check that myself. But base pressure (aka blowby) does not indicate the health of the compression rings and liner, which is the weak spot on these.
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