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Anyone tried to measure blowby pressure - Printable Version

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Anyone tried to measure blowby pressure - peter460332 - 11-23-2009

Was thinking of making a repeatable blowby measuring guage for an Om617. I was contemplating of measuring pressure in return line to inlet manifold with a restricting orifice. One will eventally over time be ample to quickly assess if an engine is satisfactory or not. Any thoughts - what pressure will engine shut off ( MW pump on mine )
Peter


RE: Anyone tried to measure blowby pressure - ForcedInduction - 11-23-2009

Pressurizing the crankcase on any engine is very bad, its a quick way to blow out many oil seals.

One standard measuring method is to get a 30 gallon trash bag and observe how much it inflates over 1 minute.