What to know about thePositive Crankcase Ventilation (PCV) Valve:
The PCV Valve movesgasses from inside the crankcase to the intake manifold where they are burned as part of the usual combustion process. Excess fumes are burned by the engine, rather than released into the atmosphere.
Facts to Note:
PCV valve failure can be caused by other engine problems. To make sure that this is not the case, a mechanic should test your engine after changing the PCV valve, to make sure that the car runs well and doesn’t have other problems.
How to Fix:
Disconnect the vacuum hose.
Take away and change the PCV valve.
Replace PCV hose if appropriate.
Fix vacuum hose.
In general, it is a good practice to change the PCV valve during every major tune-up. Changing the engine oil and flushing the engine on a regular basis will prevent sludge build-up inside the oil pan that may cause the PCV valve to fail.
Common symptoms indicating you may need to change the Positive Crankcase Ventilation (PCV) Valve:
Leaks in the engine compartment.
Leaks underneath the car.
A hissing noise from the engine.
Car operates poorly.
Importance of this service:
SEE ALSO:HOW TO REPLACE A CRANKSHAFT OIL SEAL
As excess gas build upin your crankcase, the PCV valve forwards it through the intake manifold, where they are used as a normal part of your engine’s process. When the PCV valve fails, your engine will not redirect this excess gas that it depends on. As such your vehicle will not run smoothly, and it will likely get much worse gas mileage.