Re: To: Tim B

Posted by Tony C. on June 19, 2005 at 08:40:08 from (24.187.69.249):

In Reply to: To: Tim B posted by Andrew H on June 19, 2005 at 08:24:24:

Probably; on older cars before the advent of PCV valves the vapors that built up in the crakcase from heat and blowby were exhausted thru a "road draft" tube that hung down from the top of the crankcase. As the car moved down the road a slight vacumn was created in the pipe by the air passing over the beveled end of the tube which caused it to suck the gasses out to the atmosphere.

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