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· Registered
2002 Dodge Durango SLT 4.7 liter Magnum 163K
10 Posts
Discussion Starter · #1 ·
I recently saw something that you should replace the pcv valve with a one-way type filter. Reason being the pcv valve puts hot air back into the engine? Anyone know about this? Not sure if it would even make any difference.

· Home School Valedictorian
3,498 Posts
The PCV is a one-way check valve. The valve allows blow-by in the crankcase to be pulled out by the engine vacuum. The check valve closes if the engine backfires, preventing the pressure from the backfire of blowing out gaskets.
It is an emision control device.
For most street engines, there is more benefit to running one.
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