Long RV Trip Report - Also Engine Heating

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bshowalter

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Have you replaced the thermostat? The original thermostat part number was superseded with a revised part. I replaced it on my 2019 and both engine and transmission temp stay much lower now in normal driving and when towing.

 

VBreithaupt

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I brought up this same issue as well Jskane125. I pulled a camper last summer and and didn't have this issue with the temp. rising up on me. I noticed it happening this winter when I was pulling my utility trainer. It always happens in 9th or 10th gear when the turbos are running for extended period. Running it in manual 8 or 9th gear does solve it most of the time but that just seems like work around. I read that a possible radiator clog could be the cause and dealer can check the temp coming out of radiator to see if its within right range. I about to take mine in and have them figure it out because I don't think it is normal.
 

VBreithaupt

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Looks like thermostat would be the easiest and quickest thing to rule out first. I going to do that and report back
 

Rezolution

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Have any of you tried running the racing plugs that are 2 steps colder than the regular plugs?
 

LG_123

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I’ve towed our 8,000# trailer across the continent a couple times and have found deleting 10, 9, and sometimes 8 helps keep the RPMs in the optimal range. I also change the oil by 3500 miles and keep the coolant topped off to control the temp spikes which can happen towing uphill. Slowing down up a steep climb also helps.
 

slow3v

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Get your thermostat and thermostat housing replaced with the new revised OEM part. You'll drop 15F on engine temps, FYI.
 

JasonH

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I brought up this same issue as well Jskane125. I pulled a camper last summer and and didn't have this issue with the temp. rising up on me. I noticed it happening this winter when I was pulling my utility trainer. It always happens in 9th or 10th gear when the turbos are running for extended period. Running it in manual 8 or 9th gear does solve it most of the time but that just seems like work around.
Using the lower gearing isn't a work around. It's how the engine functions under heavy loads. The taller gears result in more boost, which elevates temps. By using lower gears the engine RPM is increased, which increases coolant circulation. It also reduces the load on the engine by employing mechanical leverage.
 

3rd Expyowner123

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My 2018 started showing temperatures numbers above the bar graph as it started getting hot when pulling my 21 foot boat at 75mph in Texas summer heat.
After having Ford dealer replace the thermostat this never reoccurred. Ford has modified the design of the thermostat.
Your pulling a much bigger load in terms of area so my experience may not apply.
Water pumps commonly develop slow leaks after mileage. I would replace both the water pump and thermostat.
 

wfdw

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I'm currently doing the same towing with the same vehicle and am very happy. No temp problems with the engine or tranny. Very strong and stable.
I don't know if I'm just lucky or if a previous owner did some fix but hope you can get there too.
 
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