When I start my car up my OP is about 65 psi on the guage with revs above
2000 and about 40 psi at idle. However after the engine and oil come up to
temperature the OP drops to about 55 psi at revs above 2500 and falls off to
about 40 psi with revs of 1500 and only about 20 psi at idle.
Do I have an incipient problem? Last year I pulled out the relief valve
spring and shimmed it about 1/4" which increased OP about 5 psi across the
board
but I wonder if it is time to replace the spring with a new one and/or lap in
the valve. Or is my oil pump not being all it should be?
The engine was rebuilt about 50K miles ago but consumes virtually no oil,
does not smoke and runs strong. I run 10W/50 synthetic oil.
Am I worrying unnecessarily?
Best--Michael Oritt, 100 Le Mans
|