Oil Temperature High

[jbny]

All,

I have an 05 4.8is and never saw the oil temperature going slightly higher than the middle (210 F), but last week it was right between 210 and 300 F , in the past even if oil temp went up the coolant temp always stayed in the middle, however this time that went higher too.

I went home and added some coolant as it seemed low, since then i have been reluctant to drive the X5 for longer distances, is there anything i can check to see whats could have caused this? at the time I was parked with AC on and engine running.

Thanks for your help

[StephenVA]

check fan operations and expansion tank fill levels

[jbny]

Thank You StephenVA

I did add more coolant, however not sure about fan operation, is this an Aux Fan? I do not have any Fan in front of the radiator, please let me know.

Thanks for your help.

[bcredliner]

Since the coolant temp is normal, the oil temp is most likely normal which suggests the problem is the oil temp sending unit. With a laser temp reader you can check the coolant temp at the expansion tank and the oil at the pan.

[StephenVA]

+1 on the test do not guess approach!