PCV valve, Do I need it?? |
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PCV valve, Do I need it?? |
Cevan |
Aug 1 2009, 05:43 PM
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#1
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Senior Member Group: Members Posts: 1,079 Joined: 11-December 06 From: Western Massachusetts Member No.: 7,351 |
I've got a '74 2.0L D-Jet motor in my car. The PCV valve has nothing inside of it (no spring or valve) so it's basically a port on the oil filler. I've got it hooked up to the airbox, like L-Jet. I can't hook it to it's stock location on the plenum as it'll over-rev the motor at idle.
I've noticed that there is oil on the inside of the plenum, presumable from the oil fumes coming through the PCV valve. Is the arrangement I have ok, or should I try and find a PCV valve. Do I risk fouling the plugs? The car does not smoke. |
Cevan |
Aug 2 2009, 09:11 AM
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#2
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Senior Member Group: Members Posts: 1,079 Joined: 11-December 06 From: Western Massachusetts Member No.: 7,351 |
Positive Crankcase Ventilation. This article seems to indicate that the PCV valve was eliminated in the '75 D-Jet motors.
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r_towle |
Aug 2 2009, 09:41 AM
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#3
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Custom Member Group: Members Posts: 24,591 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
Positive Crankcase Ventilation. This article seems to indicate that the PCV valve was eliminated in the '75 D-Jet motors. I am a wise ass sometimes. Its a vent for the case pressure. So, it has to get vented...that is a fact. If you dont relieve that pressure, it will find another way out...typically seals will blow, in severe cases you could see an oil galley blow out. The original school of thought was a simple venting to the atmosphere...ooooo not good. The second step (and all cars have this) is to re-burn the vented gases. In a drag motor or race motor, I would vent to the atmosphere to keep my air/fuel mixture exact. In the real world, we re-burn these gases. It has to go into the intake track somewhere, so where you have it works. RIch |
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