2 replies to this topic

[Woreign]

I'm wondering what the normal operating oil pressure should be? When cold, my oil pressure gauge reads a little over 50psi. As the engine warms up, it drops down to around 30 at idle and 40-45 when driving. Just wondering if this is normal?

[Guess-Works.com]

Sounds pretty good... Your running oil pressure is governed by the oil pressure relief valve, and your idle oil pressure is indicative of big end/main bearing conditions.

[mk=john]

Yes, not too bad, however my newly rebuilt engine will run at a little higher pressure.

The pressure should drop on a warm engine at idle as the oil is thinner when hot, and so less pressure required to force it around the passage ways in the bearings etc.