Posted by Bus Driver on September 06, 2010 at 06:25:00 from (66.44.250.87):
In Reply to: crankcase air posted by ron8n on September 05, 2010 at 13:12:20:
The responses below are a bit surprising. Yes, an engine can pull air into the crankcase through the vent. Take the case of a single cylinder engine. The piston moving in the cylinder changes the air volume of the crankcase by exactly the same amount as the change within the combustion side of the piston. As the piston comes down, air is pushed out of the crankcase, as the piston rises, air is drawn into the crankcase. Positive crankcase ventilation may well result in a steady inflow of air into the crankcase. Yes, keep the crankcase vent and air passing through it as clean as possible.
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