PCV (Positive Crankcase Ventilation Valve) is a directional flow control valve that allows oil fumes pushing out (Positive Pressure) from the crankcase to enter the airflow just behind the Air Filter, so the oil fumes get sucked into the air/fuel mixture and burn. This prevents oil fumes from entering the atmosphere or dripping on the ground, as pollution. Older and even some current engines not for on road use, simply have a breather cap on the valve cover, to allow pressure (and oil fumes) to escape. Pressure is developed by the action of the Crankshaft/Pistons running and some blow-by from the Compression of the engine. Sometimes incorrectly referred to as a Pollution Control Valve or even a PVC Valve (PVC being a type of plastic). If it rattles freely, it is basically OK.I'm sitting here trying to figure out what they are for and if it is cheaper to just replace them.
So back to my previous post guys. For the price I rather go new but need to know which is the correct ones and how many I need. Also where do they go or come from?sad thing after owning two titans I just now found these on Sunday while changing my oil......and I call myself a mechanic.
I cleaned mine using some Alcohol and low pressure air.
At least I think that's what I remember reading. But when I took em off they seemed fine. I did not do it at 60k though... lol. It was more like 80k or 90k when I did mine. No noticeable differences were had. Just piece of mind knowing they were fresh and new .60k?!!!! oh crap I have 84K on my truck now
using either Mobil 1 or Amsoil helps
I ordered them along with the in cabin filters from rockauto. can someone point me in the right direction, possibly with pictures to see where the pcv's go?same here just put the new ones in make me feel better.
guess I get new one this week end