Good afternoon. I am looking for some insight from my fellow Mooney fanatics. I am new to the Mooney world and am having issues with the oil temp. At level cruise, my oil temps are creeping above the green arc and approaching the red line (245 degrees). I can pull the cowl flaps to half and it cools right down to normal operation range. It has been extremely hot outside in Alabama recently, but the problem persists even at level cruise at 9,500 feet with an OAT of ~60 Degrees Fahrenheit. I have exhausted the options I am aware of (except one which will be put into action tomorrow) and need some new ideas.
Thus far, we have been chasing our tails. Cylinders 2 & 4 (same side of the engine as the oil cooler) had an exhaust gas leak which has been fixed. My A&P and I have removed and flushed the oil cooler (flow is good and fins are straight), rebaffled the side of the engine with the oil cooler, A&P inspected and tested the vernatherm and it checked good. Last idea is to put in a new vernatherm, which is on the way now and will be installed tomorrow. I have seen some forum talk about potentially having cracked cylinder heads, but all compressions are over 75 and this does not seem to be the case.
If the new vernatherm does not resolve the issue, then what?