2010 ProStar Coolant Temp

[vewdew1]

Hi guys,

Last summer I purchased a 2010 International ProStar with a Cummins ISX15 that has been converted into an RV hauler to pull my 5th wheel camper. This is my first class 8 truck, so I'm a bit of a noob. Have a couple questions...

- I noticed that it takes a long time for the coolant temperature to rise. Idling wont even get the temp gage to move. Now that the temperatures have dropped, even driving it for 30 minutes barely gets the gage above 140 degrees. Is this normal or do I have a thermostat issue? What should the normal operating temp be?

- I also noticed that the fan rarely kicks on, especially now that its cold outside, but when it does it's a very loud and annoying roar from under the hood. Is this normal?

Thanks in advance.

Danny