Runnng coolant temp issues
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Tuned
Joined: Mar 2007
Posts: 342
Likes: 1
From: South central kansas
Runnng coolant temp issues
Hey everyone, its been a while since I have been on. I guess that means my 6.0 has been running good. LOL. I have noticed over the last 3 years of owning my 6.0 that my temps seem to be a little higher than most. During the winter driving down the highway with no load my temp runs at 191. From what I have read the thermostat is set for 190 so this is good. During the summer in same conditions but with a/c on I run between 200-205. This seems a bit high but acceptable. Pulling a 6k trailer in summer conditions temp will reach 220-225 and stay at 220. This seems high for no more load than I am towing. Pulling my 8k fifth wheel my temps stay at 220 but frequently climb to 235. This scares me, and I have pushed coolant out of the degass bottle during these pulls. I have noticed the new trend is putting the external oil coolers on. Is this the cure-all we have been waiting for. I also run Spartan's heavy tow tune when pulling my 5th wheel, mild street economy tune otherwise. Thanks for the info.
I'm hitting easy street
Joined: Nov 2009
Posts: 6,395
Likes: 27
From: Central Oregon
Is your fan coming on? Should be at those temps. And when it does, it will knock those ECT temps right down. Mine, when I pay attention, starts to come on right around 218.
Since you are seeing the new trend, have you checked your EOT temps lately?
Since you are seeing the new trend, have you checked your EOT temps lately?
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Tuned
Joined: Mar 2007
Posts: 342
Likes: 1
From: South central kansas
I do not have an oil temp guage in my truck. Yes my fan kicks on somewhere in the 215-218 range, sometimes it brings temps down, other times it will not budge them at all. LIke I said, my coolant temp sits at 220-222 consistently when towing. I guess I should get an oil temp guage and check it before I spend a grand on an external oil cooler.
Hotshot
Joined: Jul 2005
Posts: 13,834
Likes: 25
From: Middle Tn.
I do not have an oil temp guage in my truck. Yes my fan kicks on somewhere in the 215-218 range, sometimes it brings temps down, other times it will not budge them at all. LIke I said, my coolant temp sits at 220-222 consistently when towing. I guess I should get an oil temp guage and check it before I spend a grand on an external oil cooler.
Junior User
Joined: Nov 2010
Posts: 80
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The oil temp will get hot first if the oil cooler is plugged. and will make the coolant temps run cooler. Do you have an egr delete? or have the tuner cutting it out? if so, might want to check that, It could be messing up the cooling fan.
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Tuned
Joined: Mar 2007
Posts: 342
Likes: 1
From: South central kansas
No, I do not have an egr delete. Aside from the tuner and exhaust truck is stock. Tuner does not have tune to disable egr cooler. When truck is warmed up to operating temp, how much warmer should engine oil be than coolant as a baseline reading? Is there a good place to point an infrared thermometer at to get this reading?
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Tuned
Joined: Feb 2009
Posts: 482
Likes: 6
From: Alberta
When I used to have a heavy load up on steep road, I found that gearing down and having the engine / fan / water pump turning faster actually helped to bring the temps down, even if the engine did not seem like it was lugging. Don't know if it works the same way on these trucks.
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