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Question? 700

posted by  Rolyak on  Mon Sep 8 02:32 CST 2003
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last visit: Fri Oct 24 08:03 CST 2014
[RELATED]

Road draft tubes were used on vehicles prior to emission controls. The valve cover had a breather for the inlet and a tube located elsewhere on the engine, this tube dropped down low where the vehicles movement would create a slight vacuum and pull the blowby vapors out to the atmosphere. Big pollution maker!
I re-read your post and if I understand it correctly your blowby vapors are still going back to the turbo inlet hose. Sorry for the confusion.






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