Re: Do truck flatheads use a filter on crankcase vent?


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Posted by Northern Calif Dave on Tuesday, November 16, 2004 at 6:29PM :

In Reply to: Re: Do truck flatheads use a filter on crankcase vent? posted by Tim Holloway on Tuesday, November 16, 2004 at 5:23PM :

Yes, that is the draft tube. It works based upon a rammed air situation. Over 25 mph, air is rammed up the pipe venting the crankcase.

The situation I described before with the PCV valve is another type of crankcase ventilation used for "severe duty" situations where road/highway speeds are not typical, therefore the road draft tube won't work properly.



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