AOP
In Remembrance 2023
This engine has been giving me fits lately. C-90-12F. I had lead deposits that made it necessary to pull all 4 jugs and have them overhauled, about 100 hours after I had to do it the last time. OK, so once they are back on, I had to break them in. On the second break in flight, I had noticeably less oil pressure than I normally do. So, I had visions of rebuilding the entire engine. Tried more oil, no good. Tried cleaning the oil pressure regulator valve, no good. Then we added a washer under the spring of the valve, and that raised the O/P to an acceptable level, but it is still not what I am accustomed to. It usually went to around 40 on warmup and then to 50 at full power and stayed there at cruise. Landing, it went to about 30.
Before the spring adjustment, it went to 50 but then backed off to around 30 and on landing it pegged at zero. I had to taxi in under power and braking to keep it above red line.
We're going to replace the valve spring and try adding a T fitting to the instrument line and adding another O/P gauge to see if it agrees with the one I have.
I am flying it to break in the cylinders, but am not comfortable with things the way they are.
Before the spring adjustment, it went to 50 but then backed off to around 30 and on landing it pegged at zero. I had to taxi in under power and braking to keep it above red line.
We're going to replace the valve spring and try adding a T fitting to the instrument line and adding another O/P gauge to see if it agrees with the one I have.
I am flying it to break in the cylinders, but am not comfortable with things the way they are.
