View single post by Jim Ketcham
 Posted: 04-21-2011 12:46 am
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Jim Ketcham


Joined: 03-13-2005
Location: Salt Point, New York USA
Posts: 198
I am not sure what you are describing.  There is no hose that comes out of the Dellorto's (other than fuel hose).  The crankcase breather hose is a sort L shaped hose (about 1" diameter) that attaches to the bottom of the air box from the crankcase vent.  It allows heavy crankcase fumes to condense and return to the crankcase and the light ends to be drawn into the carbs to be burned.  

Some people have attached this vent to their aftermarket air cleaners directly before the carbs.  This should not be done as the heavy crankcase vapors do not get a chance to condense and return to the crankcase.  Usually one sees oil dripping from the air cleaners of these cars.