Forum Discussion
chevor
Jan 21, 2015Explorer
I was seeing temps over 240 during climbs.
What I have experienced is cleaning the cooling stack (where the components are removed from the truck and then cleaned) can really bring temps down. Its extremely hard to clean between radiator and intercooler while still in truck. Rarely see 200 now.
I don't know if you have a the classic or new body style. I know with my 2010 the radiator came out from the rear after fan was removed. So it was unnecessary to remove AC coil and intercooler. Just washed those out from behind after radiator was removed.
The problem with the Duramax is the transmission is first cooled through the radiator and then goes to an air cooler. If the radiator isn't cooling the engine coolant effectively it will make the trans fluid even hotter.
So a plugged up radiator will cause your problem.
What I have experienced is cleaning the cooling stack (where the components are removed from the truck and then cleaned) can really bring temps down. Its extremely hard to clean between radiator and intercooler while still in truck. Rarely see 200 now.
I don't know if you have a the classic or new body style. I know with my 2010 the radiator came out from the rear after fan was removed. So it was unnecessary to remove AC coil and intercooler. Just washed those out from behind after radiator was removed.
The problem with the Duramax is the transmission is first cooled through the radiator and then goes to an air cooler. If the radiator isn't cooling the engine coolant effectively it will make the trans fluid even hotter.
So a plugged up radiator will cause your problem.
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