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njk53 · 07-29-2015, 03:18 PM

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?

07-29-2015, 03:18 PM	#1
njk53 Senior Member Join Date: Jul 2007 Location: East China, MI Posts: 504 Likes: 0 Liked 0 Times in 0 Posts	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? __________________ Nelson Kowal Stock 345