Flew again today. Outside air temperature was 69 deg F. I took off at 07:15 climbing at 100 MPH to 6500 ft. Started orbiting over the airport. Within 20 minutes my oil temperature rose to 240 deg F and stayed there unless I throttled back below 2000 RPM..
I have redone my baffling, no problem there. The sides of the turbulence reducers on the top inlet of the upper cowling are sealed. I have checked the calibration of the oil temperature gauge, within 5 degrees of actual. The oil pressure is 60 psi with 8 qts in the sump. Timing is correct and with the exception of the oil temperature the engine runs great. The oil cooler is a 7 tube Niagara Thermal supplied in the Van?s FWF kit. Mineral oil looks good and the plugs are not fouled. Looks like less than .5 qt burn per hour.
The engine is a Penn Yan O-320 and I only have 8.2 hours on it. This time in eight flights. Trying to break it in but do not want to exceed the oil temp limit for too long. I have not talked to Penn Yan yet, I will do that Tuesday. Penn Yan?s test shows an oil temp of 198 deg F after 30 min at 2700 RPM with OAT of 24 deg F. Yes they did the test in winter upper state NY.
What could be the problem? Incorrect setting of the oil thermostat? The oil cooler is hot but I have not checked to see if it is partially clogged. Oil cooler bypass valve malfunction? What else? I need help!![Confused :confused: :confused:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
I have redone my baffling, no problem there. The sides of the turbulence reducers on the top inlet of the upper cowling are sealed. I have checked the calibration of the oil temperature gauge, within 5 degrees of actual. The oil pressure is 60 psi with 8 qts in the sump. Timing is correct and with the exception of the oil temperature the engine runs great. The oil cooler is a 7 tube Niagara Thermal supplied in the Van?s FWF kit. Mineral oil looks good and the plugs are not fouled. Looks like less than .5 qt burn per hour.
The engine is a Penn Yan O-320 and I only have 8.2 hours on it. This time in eight flights. Trying to break it in but do not want to exceed the oil temp limit for too long. I have not talked to Penn Yan yet, I will do that Tuesday. Penn Yan?s test shows an oil temp of 198 deg F after 30 min at 2700 RPM with OAT of 24 deg F. Yes they did the test in winter upper state NY.
What could be the problem? Incorrect setting of the oil thermostat? The oil cooler is hot but I have not checked to see if it is partially clogged. Oil cooler bypass valve malfunction? What else? I need help!