Originally Posted by iminhell
I'm inclined to side with Puke on this one, air in the cooling system.
Try pinching off the heater core bypass and warming the car up, this is the front bottom hose coming off the thermostat outlet housing.
What that does is force water through the heater core and oil cooler, which is were air likes to get trapped.
This makes a lot of sense now I think about it. I will try it tomorrow.
Originally Posted by Puke
Might still have air in the cooling system which will make the water temp gage to read incorrectly. Did not make sense to me at first until I had a few beers and thought about it real hard. May or may not be your issue but I would check the coolant overflow level anyway. Also look, smell, and listen for a coolant leak. Either way good luck and keep us posted as I for one am curious.
I tried your method too. But the beer made my brain fuzzy
Where exactly is the oil cooler?
And I checked the water level. It was fine.