Dodge Cummins Diesel Forum

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-   07.5 - 09 3rd Gen 6.7L Powertrain (https://www.cumminsforum.com/forum/07-5-09-3rd-gen-6-7l-powertrain/)
-   -   High coolant temps (https://www.cumminsforum.com/forum/07-5-09-3rd-gen-6-7l-powertrain/2498221-high-coolant-temps.html)

Jsindle 04-13-2019 02:01 AM

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

the man in black 04-13-2019 07:51 AM

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?

Jsindle 04-13-2019 07:45 PM

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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