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What do you mean by active or passive? There are PCV check-valves screwed into both head covers, which connect to tubes that go straight to the intake manifold for vacuum
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07-31-2012, 12:51 PM
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A True Z Fanatic
 
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What do you mean by active or passive? There are PCV check-valves screwed into both head covers, which connect to tubes that go straight to the intake manifold for vacuum sources.
Then there are unvalved lines going from elsewhere on the covers to the air intake tubes for crankcase fresh air supply, which have baffles (presumably to prevent catastrophic problems w/ intake backfires). |
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