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Pulsating air pressure

C3 Tech/Performance - forums.corvetteforum.com
Is there some truth to the mechanics' story I've heard about taking the oil filler cap off while the engine is idling and feeling the pulsating air pressure coming from the filler hole as a sign there is a problem with valves or rings? I have a 4 cylinder engine that is puffing out quite a load of air pressure and was wondering if anything specific could be targeted with that.
Date: Jan 13, 2018   


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