Can I use a breather instead of a PCV valve?
Registered. Put me in the PCV camp. A PCV system actually clears combustion gas blowby from the engine, whereas breathers will only allow positive pressure to escape. These gases will combine with moisture in the air and oil to create acids and sludge.
Is PCV valve open at idle?
The PCV valve controls the flow from the crankcase to the intake manifold. This open valve results in maximum crankcase ventilation. When the engine is idling or cruising, the intake manifold vacuum is high and pulls the valve upward, blocking the port to the intake manifold.
Is PCV valve necessary?
The PCV valve is necessary to prevent the gasses from going backwards out the breather when there is no vacuum. As others said you could go without it but you’ll spew these very bad gasses, even into the passenger compartment. There is no loss in performance with a properly running PCV.
Can a leaking PCV valve cause rough idle?
PCV valve. PCV stands for Positive Crankcase Ventilation. This can cause the valve to become blocked and inoperative, or it may start to leak. A PCV valve leak can cause the air-fuel mixture to run too lean, and this will cause a rough idle.
How does a PCV system work on an LS6?
A PCV system is designed to force any positive crankcase pressure into the intake manifold, rather than continue allowing the engine to build up pressure inside. The LS1 system just happens to force oil along with the air as well, so GM seemed to take a stab at fixing the issue with the LS6 system.
Where is the PCV valve on a car?
Other applications utilize a PCV valve mounted centrally in the intake manifold, above the lifter galley, with a fresh air intake equipped on one or both valve covers. Once inside the engine, the air circulates through the engine clearing away substantial amounts of moisture and harmful acidic blowby vapors.
What is PCV valve selection for a high performance engine?
Proper PCV Valve Selection for a High Performance Engine Build BY MATT WAGNER ANDGENE WAGNER 1 2 36JULY 2015 engine professional vacuum is highest and the PCV is in idle mode. The second mode flows a larger amount when the engine is under a load (cruise mode) and the vacuum level has dropped.
What is the difference between an LS1 and LS6 valve cover?
The LS1 system just happens to force oil along with the air as well, so GM seemed to take a stab at fixing the issue with the LS6 system. The LS6 setup pulls the pressure not from the valve cover, but from the VALLEY cover. This is the cover that resides under the intake manifold, and sits between the 2 cylinder heads.