Cooler thermostat question

Grumpy Bear · April 8, 2020

3 hours ago, tyler.frost92 said:

Just odd, never had a truck that's ran this hot while towing. I figured it wouldn't be out of the question to shave off 10-15 degrees.

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IF your absolutely certain the entire system is perfect...………… IT IS PERFECT RIGHT...then......

I'm going to catch heat for this but there is a card not yet played.

20% undiluted Dex Cool, 80% RO water + ONE bottle of Red Line Water wetter. Go back to 50/50 late fall before it is freezing.

Get greedy and use straight water and wetter or your under 20% glycol and use you AC you WILL break things.

If you forget this fall and you break it ...I won't know who you are.

Past that your going to spend some money on your system. Thicker core, aux trans cooler, aux oil cooler, fan settings and so on.

mookdoc6 · April 8, 2020

24 minutes ago, Grumpy Bear said:

IF your absolutely certain the entire system is perfect...………… IT IS PERFECT RIGHT...then......

I'm going to catch heat for this but there is a card not yet played.

20% undiluted Dex Cool, 80% RO water + ONE bottle of Red Line Water wetter. Go back to 50/50 late fall before it is freezing.

Get greedy and use straight water and wetter or your under 20% glycol and use you AC you WILL break things.

If you forget this fall and you break it ...I won't know who you are.

Past that your going to spend some money on your system. Thicker core, aux trans cooler, aux oil cooler, fan settings and so on.

Yup....I would go 60/40 and you don't have to change in Fall is all I would add. It might ever so slightly lower it. Never go above 60/40 is my rule.....maybe time for aftermarket on the Cooler?

flyingfool · April 8, 2020

18 hours ago, tyler.frost92 said:

Trans was running a consistent 185 pretty much the entire time. Truck has always been like this. Snapped the pic over an hour into my drive, I run 75-85 on the highway. No reason I shouldn't be able to do so with a pop up on the back, and have to back off speed. Temps were cycling between 215-221 the whole way, oil temps between 225-231. Unloaded normal driving the truck usually runs between 185-210 depending on traffic and ambient temperature.

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i thought the speed limit while towing with a pick up on a hitch was 55mph? i would look the otherway if your a 5th wheeler, but you sound like a weekend warrior type..

tyler.frost92 · April 8, 2020

i thought the speed limit while towing with a pick up on a hitch was 55mph? i would look the otherway if your a 5th wheeler, but you sound like a weekend warrior type..

No that's not the case. Not sure what you mean by weekend warrior. I asked for help on cooling don't need to be chastised for driving the speed limit or 5 over with a 3000lb popup

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flyingfool · April 8, 2020

anychance the Duramax radiator will fit in your truck?

Grumpy Bear · April 8, 2020

24 minutes ago, tyler.frost92 said:

No that's not the case. Not sure what you mean by weekend warrior. I asked for help on cooling don't need to be chastised for driving the speed limit or 5 over with a 3000lb popup

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Question of curiosity. What's the speed rating of the trailers tires? There small ones, right?

tyler.frost92 · April 8, 2020

Question of curiosity. What's the speed rating of the trailers tires? There small ones, right?

Probably 65 or 75 if I had to guess

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Grumpy Bear · April 8, 2020

1 minute ago, tyler.frost92 said:

Probably 65 or 75 if I had to guess

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L rating is 75 mph max

M is 81 mph

If there is no designation on the tire then it is 65 mph.

For those around you, please....check and either upgrade if needed or adjust speed are required. Please. Don't guess. Others depend on you too. Thank you for your consideration.

Pearl2017 · April 10, 2020

If you pull out the shutters assy you'll see that you can unsnap a bunch of the shorter ones from the frame and remove them without getting a CEL. the longer ones stay in attached to the actuator. This will let a bit more air in even with the shutters closed. For thermostat get yourself a camaro,vette or caddy tstat and Youll see there is a small flattened dimple on the disk where a 3/16" bleedhole can be drilled. This is an old Chevy trick that will drop the temp just a bit more. if you have one, flip the trans cooler tstat over to lower the trans temp about 30 degrees. Are you running premium 94 in that 6.2 when you tow? If you go lower grade the engine will detune and likely heat will go up. My guess the main heat issue is the speed you're running. With a large load and tall gearing there likely is some knock and lots of timing is being pulled. from the logging Ive done the stock 6.2 tune has timing pretty close to the edge for the 91 gas available around here.

Grumpy recommended Water Wetter ...i wouldn't touch that stuff. Google "Brown Gunk". that stuff breaks down and gets a nasty brown oily color i found out the hard way myself.

Grumpy Bear · April 10, 2020

6 hours ago, Pearl2017 said:

Grumpy recommended Water Wetter ...i wouldn't touch that stuff. Google "Brown Gunk". that stuff breaks down and gets a nasty brown oily color i found out the hard way myself.

I've used this product for 20 years without such an issue. Interesting.

flyingfool · April 11, 2020

anyone know if the larger radiator from the Durmax will bolt upto the stock gas truck rad support? it has to have much bigger cores to handle the diesle energy...

gat0r · April 11, 2020

Mishimoto radiator looks like it would help cool things down well

mookdoc6 · April 14, 2020

On 4/11/2020 at 1:37 PM, gat0r said:

Mishimoto radiator looks like it would help cool things down well

With the Mishi comes price as we all know....Let's face it these pigs Run Hot and GM likes em running hot...I am learning to accept it.

JONBLARC7 · April 14, 2020

What gas are you running???

I pull a much heavier load with my boat which is 6,500 to 7,000 depending on how full my 43 gallon gas tank is. I pull at 65 and never hit those numbers.

tyler.frost92 · April 15, 2020

What gas are you running???

I pull a much heavier load with my boat which is 6,500 to 7,000 depending on how full my 43 gallon gas tank is. I pull at 65 and never hit those numbers.

Nothing but 93. If you're only monitoring the coolant temp from the stock gauge you would never think it's over 200/210

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