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      01-20-2013, 07:28 PM   #9

Drives: 03 Turbo Cobra, 2011 335xi
Join Date: Jun 2010
Location: Wallingford CT

iTrader: (3)

Originally Posted by simon View Post
I can't really tell where the hissing comes from to be perfectly frank. It's ear piercing and I can't bear to have it on for long.

I don't know where else it could be coming from other than he intake manifold, all I did was replace valve cover, crank case vent hose, and intake manifold. Could crank case vent hose issue cause this?

I really appreciate your help.

I thought you didnt replace the intake manifold? You just said you did again lol

Yes the crank case vent hose can cause this. If its not clipped on properly or cracked it will do this. Also the crank case vent valve if its bad it can do this.