High oil temperature 912UL
in 912 / 914 Technical Questions
6 years ago
I need some help. I have a 2003 912UL in an Evektor Eurostar. I have had it for 10 years and for the first 5 years the oil temperature in the cruise was in the range 75-105 degC throughout the year.
About 5 years ago I had a problem that required an engine rebuild and since then the oil temperature has been much higher. Previously in the winter I had to block off part of the oil cooler and the coolant radiator to get the oil temp up to 100 degC even during the climb.
Partly as a result of this issue I had the engine disassembled and inspected again, nothing was found. I've checked the hose routing, cleaned out the oil cooler and checked the sensor, all without finding anything. I am finding that I have to throttle back in the climb to prevent the temperature from going above 120 degC.
I have not made any adjustments to the prop, the carbs or the cowling. What is odd is that the coolant temp is quite a bit lower at 65 degC. It is as though the heat in the oil is not being transferred to the coolant. I guess that if I had a water pump fault the CHT would be high and it is only about 80 degC.
I am at a loss to explain why this has happened. I have spoken to someone with exactly the same plane/engine configuration and they are getting oil temps 30 degrees lower than mine, just like I used to!
Any thoughts or advice would be appreciated. Thanks.
About 5 years ago I had a problem that required an engine rebuild and since then the oil temperature has been much higher. Previously in the winter I had to block off part of the oil cooler and the coolant radiator to get the oil temp up to 100 degC even during the climb.
Partly as a result of this issue I had the engine disassembled and inspected again, nothing was found. I've checked the hose routing, cleaned out the oil cooler and checked the sensor, all without finding anything. I am finding that I have to throttle back in the climb to prevent the temperature from going above 120 degC.
I have not made any adjustments to the prop, the carbs or the cowling. What is odd is that the coolant temp is quite a bit lower at 65 degC. It is as though the heat in the oil is not being transferred to the coolant. I guess that if I had a water pump fault the CHT would be high and it is only about 80 degC.
I am at a loss to explain why this has happened. I have spoken to someone with exactly the same plane/engine configuration and they are getting oil temps 30 degrees lower than mine, just like I used to!
Any thoughts or advice would be appreciated. Thanks.
