Thread: Loose oil cap
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Old 07-22-2020, 12:08 PM   #5
JFP in PA
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Quote:
Originally Posted by sfkjeld View Post
Does The oil system need to be air tight?
Yes, the crankcase is under 5 inches of water level vacuum from the AOS while the engine is running. The vacuum is necessary to help the low tension piston rings seat properly.
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Last edited by JFP in PA; 07-22-2020 at 12:14 PM.
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