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Chrysler oil pressure


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Same engineers, different make, slightly different year: For 1933 Plymouth on the then new L-6 engine the owners manual says 30 PSI at 30 MPH.

I typically see 40 PSI at road speeds when the engine is warm. Idle pressure varies a lot and can be as low as 10 to 15 PSI if the engine is really hot. Slightly later engines than mine changed out the oil pressure relief system with one that shuts off flow through the bypass filter if the pressure is too low. I'd expect the hot idle pressure to be higher on those engines, probably 20 to 30 PSI.

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