Hi, I found a small oil leak at cylinder #3 valve cover.
The engine has only 6 hrs on hobbs, It happened after a one hour flight in cold weather.I have an oil cooler thermostat fitted but I forgot to cover a small surface of the water radiator before the flight. During the flight, I had noticed a wide temp variation of CHT but within limits.
I am wondering if this could be the cause of the leak. I have checked the cover torque, it was all good.

I will do an engine ground run up before next flight.

8373_1_4270268D-7C9C-44DA-8F47-61881A5C248C.jpeg (You do not have access to download this file.)
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