Overheating towing with Denali 6.2L - Losing my F'n mind!!

[kbuskill]

Yes it did. I would say its a hair positive. I think the heat tape helped a bit.

I would still think there may be an issue with the radiator.

Back in the day you could get a radiator rodded out but it's probably nearly as cheap to just purchase a new one.

You could try having it "boiled out" if there is a local shop that can do it near you... but again, you may have better results with new... especially an upgraded one like the new Mishimoto.

 

[puckhead]

I would still think there may be an issue with the radiator.

Back in the day you could get a radiator rodded out but it's probably nearly as cheap to just purchase a new one.

You could try having it "boiled out" if there is a local shop that can do it near you... but again, you may have better results with new... especially an upgraded one like the new Mishimoto.

I can't swing the mishimoto right now unfortunately. I might just go with a cheaper stock one.

 

[kbuskill]

I can't swing the mishimoto right now unfortunately. I might just go with a cheaper stock one.

New stock is better than old clogged stock... lol

Alternately you could try some radiator flush OR remove the radiator and fill it with CLR and let it sit for a bit then flush it really good and reinstall... lol

 

[puckhead]

New stock is better than old clogged stock... lol

Alternately you could try some radiator flush OR remove the radiator and fill it with CLR and let it sit for a bit then flush it really good and reinstall... lol

Right now I just want to shoot it! Hot lead will clean it right!?!?! I will see what rockauto has.

 

[kbuskill]

Right now I just want to shoot it! Hot lead will clean it right!?!?! I will see what rockauto has.

I hate throwing parts at something and hoping it will fix it... but assuming your fans are functioning properly and to full capacity, my assumption would be a clogged radiator.

How many miles on the truck and how long have you owned it???

 

[gpracer1]

Both of my trucks stay dead-nuts at 210° 100% of the time. The needle never moves. Only time they go higher is when I'm towing, and only then when I'm really working the engine.

Yeah I hate that.
Mine reads 210 all the time when actual temp on tech 2 is 195.
I would love to be able to “calibrate” the gauge to show actual temp.

 

[puckhead]

I hate throwing parts at something and hoping it will fix it... but assuming your fans are functioning properly and to full capacity, my assumption would be a clogged radiator.

How many miles on the truck and how long have you owned it???

Just recently hit 200000. Owned it for about 5 years.

 

[kbuskill]

Yeah I hate that.
Mine reads 210 all the time when actual temp on tech 2 is 195.
I would love to be able to “calibrate” the gauge to show actual temp.

Same here... gauge shows 210... actual temp 192°.

 

[swathdiver]

Sorry I thought I saw trans temp

That was the other three transmission posts you are helping out on!

Mine reads 210 all the time when actual temp on tech 2 is 195.
I would love to be able to “calibrate” the gauge to show actual temp.

I read somewhere that the gauge is purposely slow and made to stay in the middle range so as not to alarm people.

Just recently hit 200000. Owned it for about 5 years.

I'm plum wore out Andy and have to sign off for the day. If I remember right you have a child due real soon and I reckon funds will be tight. You really need the services of a Tech2 and the shop manual. But take a look at the radiator's coolant. Green stuff is bad, and worse when mixed with Dexcool.

 

[swathdiver]

Why not try and clean the system out and do a water flush after the pressure test?

Follow the GM specs and procedure in your shop manual.

 

[puckhead]

Well thanks for listening! It is tiring for sure. I recently did a full flush. I did switch to green, I read on here somewhere to give it a shot. Do far, no better or worse. I plan to order a new radiator now. I'll probably do another flush then too. Used that radiator flush kit too this last time.


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[swathdiver]

Well thanks for listening! It is tiring for sure. I recently did a full flush. I did switch to green, I read on here somewhere to give it a shot. Do far, no better or worse. I plan to order a new radiator now. I'll probably do another flush then too. Used that radiator flush kit too this last time.

Did you switch to green before all this happened? Did you do a chemical flush or just water?

 

[Warriorpluto]

I did a bit of research and one certified gm mechanic says tcc valve messes up after a long drive if it's defective and causes this issue. Sometimes even when not towing. I'll have to find it again. He says valve body should he replaced if this occurs. This particular problem doesn't set off an engine light neither. If it were me I'd get a new valve body and and transmission control module to fix tthat problem and be done with it or get a low mileage 6l80. Both would be the same price.

 

[Warriorpluto]

here it is. you will see the technicians explanation at the bottom


https://www.justanswer.com/gmc/azma...2_1530665499_c25f95fdc3227eec2c8e236ffc27eae2

 

[petethepug]

Love it when symptoms are met with info backed up with GM service/repair data.

I’d buy an inexpensive infrared scanner and keep it in the center console. When things go sideways, get that puppy out and check the fuel and coolant enter/exit temps to compare to typical usage temps.


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[puckhead]

Did you switch to green before all this happened? Did you do a chemical flush or just water?

Both. It did it a few times before I changed and a few times after. I did a chemical flush when I flushed the system.

Sorry for the delay, the baby finally came! Gonna be busy for a while!

 

[puckhead]

I did a bit of research and one certified gm mechanic says tcc valve messes up after a long drive if it's defective and causes this issue. Sometimes even when not towing. I'll have to find it again. He says valve body should he replaced if this occurs. This particular problem doesn't set off an engine light neither. If it were me I'd get a new valve body and and transmission control module to fix tthat problem and be done with it or get a low mileage 6l80. Both would be the same price.

I actually had that fixed a while back. For that issue I was getting all sorts of codes and error messages though. Haven't had that issue since then.

 

[swathdiver]

Sorry for the delay, the baby finally came! Gonna be busy for a while!

Congratulations! Boy or girl and how's your wife doing?

 

[puckhead]

Congratulations! Boy or girl and how's your wife doing?

Thank you! Third girl! We have our hands full! Wife is doing good, sore though. Ended up being a last minute c-section.

As for the truck, just ordered a new radiator, should be here soon!

 

[swathdiver]

Thank you! Third girl! We have our hands full! Wife is doing good, sore though. Ended up being a last minute c-section.

As for the truck, just ordered a new radiator, should be here soon!

Thank the Lord your wife is doing well! We also have three girls and yes, they keep us pretty busy!

Get that Denali done quick, I bet that 1-ton Ford brought on the labor! LOL