vanzuilekom wrote:
Hello,
I have same engine in 2008 model. On the flats at any outside temp it runs at 192-194. Climbing at 6% for 10 miles it will go to 210 and the fan kicks in and cools immediately to 195. I called Cummins and they said fan on at 210 is the spec. and 192-194 is the thermostat set point. It has been this way since day one.
Hope this helps.
Check the belt for slippage. Check the rad for dirt or obstructions. Check the coolant level and also the rad pressure cap for spring tension and seal condition.
It just turned a year old with just under 3000 miles on it. The coolant recovery bottle is within limits and the cap is checked for tightness before every trip and is fine. So hopefully the belt is tightened correctly being so new, and I really hope the radiator hasn't accumulated that much dirt as we haven't been in dusty conditions. It looks to be clean.
What are you driving and your weight? I'm at about 32,000 GCWR ( with 4,000 toad). Just wondering if a big difference in weight being moved.
And in another note that still leaves me 6,000 more lbs allowable weight I can tow within specs ( above current toad) and about 4000 more in the allowable MH GVWR. So having 6,000 more lbs hanging off the back is going to make a big difference in engine and transmission temps and additional 4,000 lbs of cargo (additional 10,000 lbs) . It just seems to be at a high temp for a light load and ambient air temps.
