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Old 12-20-2010, 05:41 AM
oldred oldred is offline
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It certainly could be excessive blow-by which would not be good but another likely cause is simply the crankcase ventilation clogged. Are you finding an oily residue on the outside of the crankcase anywhere? A compressor pump crankcase needs to be ventilated just like a gas engine and if completely clogged, or nearly so, will start blowing oil out the crankcase in various areas. However if only partially clogged it may only blow little if any oil out but may pick up condensation from normal blow-by (even a new pump does not have a 100% seal on the rings) which will result in water in the oil, how old is this pump?
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