Truck Running Hot - Dodge Cummins Diesel Forum
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post #1 of 6 (permalink) Old 09-13-2017, 06:12 PM Thread Starter
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Truck Running Hot

I am not for sure if I have a blown head gasket or not, I am not seeing any bubbles in the overflow tank. The truck normally runs around 202 and now it seams to be running around 204-206 and when I pull a trailer is is climbing up to 216 at times and then running around 210. If I get off the throttle it will cool back down to 199 and then back up to 206. I has not been that hot outside so it shouldn't be running that hot. Any ideas on what it possible could be? Thanks for any help.


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post #2 of 6 (permalink) Old 09-13-2017, 06:26 PM
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Check if your rad is clean, had a buddy with the same problem and the rad was completely plugged with straw dust

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post #3 of 6 (permalink) Old 09-13-2017, 08:07 PM
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That's not hot at all. Factory stat is 200f so they will cycle up around 205-210 then back down. Depending on the weight of the travel and speed your going they can get to 216 very easily.

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post #4 of 6 (permalink) Old 09-13-2017, 11:23 PM
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Also, the fan clutch does not fully engage to drive the fan at full speed till 217 degrees.

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post #5 of 6 (permalink) Old 09-14-2017, 01:57 AM
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Hmm interesting, never seen it go that high but I'm also in Canada so it's always cold, even when it's hot lol

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post #6 of 6 (permalink) Old 09-14-2017, 11:00 AM
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On my 16 towing a grade will get to the 205-210 fairly easily and towing at elevation I can get the 215 and start to engage the fan on and off. Pretty normal I think. Once you hit 230 with the fan on and won't cool it down I would begin to think something is a miss

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