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Repair Topics / PCV Valve
PCV - 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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