High coolant temps - Dodge Cummins Diesel Forum
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post #1 of 3 (permalink) Old 04-13-2019, 02:01 AM Thread Starter
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High coolant temps

I have a 2008 mega cab. Bought used a couple months ago. Egr delete and exhaust is already done. When I drive around town or freeway temp is normal range. When I tow my 28 ft toy hauler temp will go to last mark before the hot red mark at 240 degrees. Has a new fan clutch in November

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post #2 of 3 (permalink) Old 04-13-2019, 07:51 AM
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Thermostat could be not opening fully. Rad stack could be dirty/plugged.
Make sure the new fan clutch is actually locking up. Should make a heck of a roar and be fully on by 215ish if I recall correctly.
Do you ever have any bubbles in the overflow? Level stay in the good range?
What tuner and settings you running?

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Truckasaurus - 2010 2500 CCSB -sold
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post #3 of 3 (permalink) Old 04-13-2019, 07:45 PM Thread Starter
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Don't know what programmer is in it was done before I got.
No bubbles in tank.
And I made sure fan clutch is engaging you can hear it working.
Possible t stat
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