Duff PCV valve symptoms?

Oranoco · Nov 25, 2015

I was asked the question and I don't know. Never changed mine but apparently they're problematic so might swap it out to be safe.

aragorn · Nov 25, 2015

Never changed one.

Its a pressure limiting valve to stop too much vacuum being applied to the crankcase.

When your on overrun, with lots of vacuum in the manifold, the pcv lets fresh air into the crankcase breather system to limit the maximum depression.

There is a couple of check valves under the manifold which stops the breather system getting pressurised when on boost. Those do fail and should be checked periodically and replaced.

Bradderz_1988 · Nov 25, 2015

Just delete the pcv system and install a catch can.

Problem solved.

Oranoco · Nov 25, 2015

Where abouts will I find those?

aragorn · Nov 25, 2015

There are two pipes off the underside of the inlet manifold.

One goes to a very obvious check valve, then off round the bulkhead to the tank vent system.

The other goes down to a rubber T Piece which connects to the main Z shaped breather pipe and the big steel pipe running to the PCV. The rubber T piece has a check valve in the end of it that goes to the manifold, if you look carefully you'll see its jubilee clipped into the T.

Oranoco · Nov 26, 2015

Cool, thank you. Will take a look at that.

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Duff PCV valve symptoms?

Oranoco

Registered User

aragorn

"Stick a V8 in it!"

Bradderz_1988

Dont replace it, Upgrade it !!

Oranoco

Registered User

aragorn

"Stick a V8 in it!"

Oranoco

Registered User

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