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07-29-2015, 03:18 PM | #1 |
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Valve Cover Breathers
I have a theoretical case scenario I was wondering if I can get some comment on by the engine experts. If you have no valve cover breathers on either valve cover (V8 Engine of course), and are using just a PCV valve, can the crankcase pressure build high enough to cause the rear main seal to fail?
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Nelson Kowal Stock 345 |
07-31-2015, 09:25 AM | #2 |
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Re: Valve Cover Breathers
YES! A PCV system requires a breather to be a ventilation system. little or no vacum under full throttle which is when the engine is making the high amount of back pressure.
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07-31-2015, 11:53 PM | #3 |
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Re: Valve Cover Breathers
I found out by accident that you need a breather installed if you use a PCV valve system. I didn't lose a rear-main seal but I sucked a valve-cover gasket up pretty good!
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Lew Silverman #2070 "The Wagon Master" N/SA |
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