MikeyM
Just got it firing!
Hello everyone,
I have a question regarding the expected oil pressure at idle.
It happens that when the oil is hot oil pressure switich is activated during idle.
I've tried multiple different oils, 10w40 Eni/Agip, 10w40 Motul, 15w40 Motul, but the result/outcome was the same.
When the oil is cold, there is no issue, oil pressure relief valve reliefs the pressure at 4 bar, I even tested the spring of oil pressure relief valve, and it is within the specs according to the repair manual.
When I tested the oil pressure relief valve I've also checked the sump for debries, still nothing to be found. Before I start further teardown of engine I just want to see what are your experiences about oil pressures in small block engines at different rpms and temperatures in genereral.
My measurements are following :
When engine and oil gets hot, oil pressure drops around 0.1bar @800 rpm.
If I increase the idle about 1000 -1100 rpms value goes up to 1.1-1.5 bar. Warning light is not activated anymore.
I see that the oil pump has the same partnumber for V35 and V75 engines so I assume only difference is the oil pressure relief valve setup in oil system between these two engines, i.e. this should not affect the oil pressure when engine is hot.
Now the question is do we have somewhere the table/data of expected oil pressures at expected rpms?
Also, what are your suggestions about the oil, shall I try different ones then recommended by manufacturer for 750 SB engine?
Many Thanks for support!
BR,
Mike
I have a question regarding the expected oil pressure at idle.
It happens that when the oil is hot oil pressure switich is activated during idle.
I've tried multiple different oils, 10w40 Eni/Agip, 10w40 Motul, 15w40 Motul, but the result/outcome was the same.
When the oil is cold, there is no issue, oil pressure relief valve reliefs the pressure at 4 bar, I even tested the spring of oil pressure relief valve, and it is within the specs according to the repair manual.
When I tested the oil pressure relief valve I've also checked the sump for debries, still nothing to be found. Before I start further teardown of engine I just want to see what are your experiences about oil pressures in small block engines at different rpms and temperatures in genereral.
My measurements are following :
When engine and oil gets hot, oil pressure drops around 0.1bar @800 rpm.
If I increase the idle about 1000 -1100 rpms value goes up to 1.1-1.5 bar. Warning light is not activated anymore.
I see that the oil pump has the same partnumber for V35 and V75 engines so I assume only difference is the oil pressure relief valve setup in oil system between these two engines, i.e. this should not affect the oil pressure when engine is hot.
Now the question is do we have somewhere the table/data of expected oil pressures at expected rpms?
Also, what are your suggestions about the oil, shall I try different ones then recommended by manufacturer for 750 SB engine?
Many Thanks for support!
BR,
Mike