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Replacement PCV valve unavailable. Will any other do?

Discussion in 'Physics' started by Michael Sherpa, Oct 8, 2018.

  1. 1979 Leyland Sherpa 230 petrol 1.7l with "O series" engine

    I have an "oil separator" (or oil catch can) attached to the side of my engine. From there it goes through a hose to the ported vacuum by the throttle plate of an SU carb. Inside the hose is a pintle valve or what you might call a PCV valve today.

    Well, it seems the hose with integral valve is now unavailable. So my question is do all PCV valves work the same? ie. close at high vacuum (idle) and opens at low vacuum (cruising speed) and closes with back pressure (preventing explosion in crankcase from a backfire). So can I purchase any replacement PCV valve so long as it is rated for a similar sized engine ie. 1700cc engine.

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