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PCV Valve
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PCV Valve - Positive Crankcase Ventilation Valve
This category contains featured questions as examples. They relate to most vehicles.
Question: What is the purpose of the PCV valve and what are the symptoms when
it goes bad?Answer: PCV means positive crankcase ventilation. This valve
uses vacuum from the intake manifold to draw the fumes from the crankcase.
Symptoms of a faulty PCV valve are poor idle and excessive pressure in the crankcase.
Question: 2001 Lincoln Towncar mileage: 98,000. I am trying to find
where the PCV valve is located. I checked the valve covers and the plenum, and I
cannot locate it.
Answer: It is behind the intake manifold near the valve cover.
Question: 2001 GMC Envoy mileage: 73,241. Where can I locate my
PCV valve? I bought one at my local auto parts store and I can't find anything
that looks like it. There are two hoses that lead into the valve cover. One can
be removed to expose a silver tip that somewhat resembles the PCV that I purchased
but it seems to be a different size. The other hose, when removed, exposes
a plastic piece that can be unscrewed to reveal three or four plastic prongs on
the end. Could the PCV go in here?
Answer: From what you describe, you found the PCV valve, the one
with the silver tip. The auto parts store may have sold you the incorrect
part.
Repair Topics /
PCV Valve
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