Have a question about my engine breather. I checked it by sucking and blowing down the engine breather hose, and found it lets in air but blocks it coming out the crankcase?. I was sure that all cars I've had it should vent out not in?.
Are you talking about the thin rubber hose going to the cam cover (PCV system fresh air intake), or the hose coming from the breather module on the back of the engine (the output of PCV system)?
