Hi,
My car has recently begun to overheat.
Initially the first instance presented as very high oil temperature reaching 110 degrees.
a couple of minutes later, after passing 110 mark I noticed the water temperature begin to rise above half way.
Once I reached home I noticed the overflow full of coolant. Mind you it was old coolant.
So after changing the thermostat, coolant, and radiator cap I tested its stability under load.
and sure enough the oil temperature does still reach 110 eventually.
Originally I thought this might just be due to thrashing around abit.
So I decided to go for a run on the freeway. 100 kmh for 30 minutes.
Sure enough the temperature reach 110 again, but water steady.
My questions are, and I apologise for my ignorance.
1) Is the oil heating the water? or is the water heating the oil?
2) if the oil is heating the water, why is it reaching such a high temperature?
3) if the water is heating the oil, what could be causing this?
Thanks