:cornut: 1st post, welcome to MA. Check the crank case to head hose and it's connection to the head for leaks 1st. Leaks from the valve cover usually involve oil not gas pressure leaks. The crank case generates both positive and negative pressure during the different phases of the running cycle.
Jason
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Jason Montague New MemberLifetime Supporter
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Thanks Jason - I assume that's the hose that comes up from below to the rear corner of the cylinder head cover. I did check it out and, while covered with a mesh, it appears to be intact. (I haven't yet figured out the magic code to remove that hose from the cylinder head cover. I'm sure it's simple once I figure out how to turn/pry the connector.)
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Jason Montague New MemberLifetime Supporter
Jason -
nkfry New MemberMotoring Alliance Sponsor
Unless someone was in there recently there is no reason that connector would come loose. My bet is the PCV, which is integral to the valve cover has failed, you'll need to replace the valve cover to fix the issue.
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I recently had to do both the valve cover and the PVC. It wasn’t too bad. Got the parts from Detroit Tuned.