Norcalrv7
Well Known Member
About 350 smoh trouble free hours on my Lycoming 360-b1e in my -7. The last few flights, I've noticed my oil pressure running in the low 90s ( a little past green range ) with oil temps at 170ish.
Oil pressure used to run lower, near 75 or so.
I replaced the vdo style pressure sending unit, which had failed internally. It was leaking oil inside
which was reading generally accurately, but high by 5-10 psi.
I've verified the pressure reading with another gauge.
My relief valve has the same 6 shim washers in it since the overhaul was performed.
As an experiment on the ground, I removed the washers from the relief valve. This caused lower rpm oil pressure to decrease to 40, but will still go right to 90psi at operating rpm. This test was done without the engine fully warmed up though, with oil temps near 140
I understand Lycoming allows 115psi during warm up
Any input on the next direction to go? Or should I take a washer or two out and forget about it?
Caleb
Oil pressure used to run lower, near 75 or so.
I replaced the vdo style pressure sending unit, which had failed internally. It was leaking oil inside
which was reading generally accurately, but high by 5-10 psi.
I've verified the pressure reading with another gauge.
My relief valve has the same 6 shim washers in it since the overhaul was performed.
As an experiment on the ground, I removed the washers from the relief valve. This caused lower rpm oil pressure to decrease to 40, but will still go right to 90psi at operating rpm. This test was done without the engine fully warmed up though, with oil temps near 140
I understand Lycoming allows 115psi during warm up
Any input on the next direction to go? Or should I take a washer or two out and forget about it?
Caleb
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