My rings are heading south (leakdown test results), and I'm trying to get as much life out of the power plant as I can. I've already removed the pcv valve, and have a routed a hose that will connect to a catch can. For the valve cover, I want a breather that I can attach a hose to and route to the same catch can. I picked one up at the local parts store (5/8" opening for the hose), but it had no threads. I found a grommet that fit, but as soon as the engine heats up, the breather/grommet pop off the fill tube. Does anybody know of a manufacturer (and part number) that makes a breather that will work (ideally it would screw in, but I'm open to other options)?
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