[200q20v] Crankcase Breather Hose

C1J1Miller at aol.com C1J1Miller at aol.com
Wed Nov 8 13:31:59 EST 2000

Scott Mockry's site says:

"Vacuum Leaks-Breather Hoses!

     You need to make sure your engine’s various breather/vacuum hoses and 
turbo intake and pressure hoses are in good shape.
     Leaks anywhere in these hoses can cause lean or rich running and poor 
starting. " ... "The large breather hose coming from the side of the engine 
that is routed around the back of the engine typically gets rotten and mushy 
on the inside part of the hose facing the engine block. Often times the hose 
can collapse on itself or will split open on the back side. This hose does 
not have hard vacuum applied inside like the 10V Audi Turbo MC engine but 
leaks could allow un-metered air into the engine. The 20V breather hose has 
the Audi part number 034-103-221AF"

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