It's got vacuum, and plenty of it. It wants to suck your finger (or hand) down the oil fill cap, it's got that much vacuum.Originally Posted by BillBoost37
I don't mean to try and shoot you down when you're trying to help, but I don't think anything could be plugged because, if I'm thinking correctly, that would build excess pressure, not excess vacuum.
Plainly said, somebody was pretty darn smart to figure out that by allowing the crankcase to take in air (i.e. the vacuum leak in the oil fill) it would prevent the car from making the noise. It's just my own opinion, but somebody was trying to cover something up by giving it the vacuum leak (which could explain why the hole was drilled into the extension). Now it's just a matter of figuring out what they were trying to cover up.....
