Last weekend I flew for 2 hours from Detroit to Newport News, Va and 4 hours back.

Going down the temp was -14°C at 11,500 ft. My oil temp looked a little low at 170°F. I closed the oil cooler air door and the oil temp went down to 150°F. I opened the air door back up, so that air was flowing through the oil cooler and the oil temp went right back up to 170°F. Same thing on the return trip. Only God knows why this happened.

In the summer with temps in the 60's, the oil temp will be 180°F with the air door open and 220°F with the air door closed.

I have no idea why it works differently in the winter?


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Lorn H. 'Feathers' Olsen, MAA, ASMEL, ASES, Comm, Inst
DynaComm, Corp., 248-345-0500, mailto:lorn@dynacomm.us
LNC2, FB90/92, O-320-D1F, 1,300 hrs, N31161, Y47, SE Michigan