ChuckGant
Well Known Member
We have an RV7 with an IO-360/CS Prop.
We are using Grand Rapids Horizon EX with the oil pressure warning alarm set to go off at 99 psi. The Lycoming manual says 115, but the highest setting allowed on the GRT is 99.
We always wait until oil temperature is above 75 degrees for run-ups and above 100 degrees for take-off and have never gotten high oil pressure warnings.
Just recently (in the last 2 weeks are so), with the weather in the 50s-60s, we are getting high oil pressure warnings when doing our run-ups, with the oil temperature above 100 degrees. Because of this, we have been letting the engine warm up to over 130 degrees before the oil pressure indicates down in the 80s at idle and under 99 at take-off. Once flying, the oil pressure remains in the mid-80s the entire flight. Oil temperatures in flight are running about 170-180 degrees.
Any ideas?
I'm thinking it is a pressure transducer problem, but I don't know enough to know what else would cause a change in oil pressure.
Thanks,
Chuck
We are using Grand Rapids Horizon EX with the oil pressure warning alarm set to go off at 99 psi. The Lycoming manual says 115, but the highest setting allowed on the GRT is 99.
We always wait until oil temperature is above 75 degrees for run-ups and above 100 degrees for take-off and have never gotten high oil pressure warnings.
Just recently (in the last 2 weeks are so), with the weather in the 50s-60s, we are getting high oil pressure warnings when doing our run-ups, with the oil temperature above 100 degrees. Because of this, we have been letting the engine warm up to over 130 degrees before the oil pressure indicates down in the 80s at idle and under 99 at take-off. Once flying, the oil pressure remains in the mid-80s the entire flight. Oil temperatures in flight are running about 170-180 degrees.
Any ideas?
I'm thinking it is a pressure transducer problem, but I don't know enough to know what else would cause a change in oil pressure.
Thanks,
Chuck