What is "Normal operating Temperature" 1997 528i

[vping]

http://www.bimmernut.com/forum/5-ser...ot-really.html

I've posted about a few things and the latest is an "odd overheating but not really" listed above.

This AM I decided to hook up the code scanner and drive to work with it on and I monitored the coolant temperature. The temp was good and normal is 198º. When I stopped at the deli, and sat and idled, it was 207º. 5 minute stop for my sandwich and the temp was down to 198º. On the way to work, fairly normal again and then sat at work and idled it. The temp was 207º at 772-784RPMs. I turned on the AC and it went up to 214º (just wanted another test). I checked the hoses and the top was very hot, the bottom was cooler but still pretty hot and the overflow tank was a few inches low.

I still think I need to purge some air out of it.

What is the normal operating temperature i should be looking at on the scanner?

Temp gauge had needle at 12:00 for the duration of the drive.

[shogun]

well, the thermostat should be originally: Thermostat 11 53 7 511 083 92 CEL (used up to 09/1998), 92ºC = 197.60ºF. That means it will open at 197.60 F, so all should be fine.

[Tiger]

You need to check the aux electric fan to see if it is working.

Do the coolant pressure test to make sure you don't have any leak.

[genphreak]

x2! ...

If it gets hot in traffic at any point, a suspect could be the viscous coupling in the fan clutch.

[Tiger]

He already replaced the clutch fan, radiator and overflow tank... from the other post...

Did you replace the thermostat? You should do this if you haven't

[genphreak]

indeed, but are they working properly? Maybe they are not even new parts. Good point to be sure the t'stat is included for sure- one would need also to check for leaking hoses, connections and so on. Pin holes in hoses could generate such symptoms too.