Bimmerfest - BMW Forums - View Single Post - How to test, clean, & redesign the original BMW dipstick guide tube (CCV vent clogs!)

Steve530 · #43 06-09-2012, 06:56 PM

I assume the engine was not running when you blew into the vent hose. Since there is no manifold vacuum to close the diaphragm, the air you blew into the vent hose went into the intake manifold.

If you were to remove and plug the hoses that connect the CCV to the manifold, you might be able to blow enough air into the vent hose to create the bubbling.

If your purpose is to identify a clogged dipstick guide tube, it would be easier and more direct to remove the CCV drain tube, connect a hose to the dipstick tube and blow through that hose.