Quote:
Originally Posted by jdlmodelt
I added octane booster to this tank till I get all the non 91 octane out. I also changed the oil. I discovered that my oil cap does not seal when it is tightened down. How come these engines have a vacuum at the oil fill tube instead of pressure?
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The AOS also lowers the pressure in the sump to a vacuum around -5 inches of water so that the low tension piston rings can properly seal.................
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Last edited by JFP in PA; 01-10-2014 at 02:54 PM.
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