Overheating while towing

[penstar4ever]

I have a 93 D250 3/4 ton (518 tranny)and it came with a dealer installed extra radiator under the bed on the drivers side in front of rear wheel,and mine never gets hot even when I tow up hills,it has a heat switch when tranny fluid get a certain temp and turns on,boy it is great.Check with the Dodge dealer and see what and if you can have one installed. Good luck:)

[86GLHT2]

never had a problem with my 02' overheating..........

[one hot diesel]

FYI Note. If you change your own coolant, make sure you Purge the air from the head, as air can get trapped creating a hot spot, cracking head,overheating, engine failure,ect...

[penstar4ever]

I would also recommend not using auto zone thermostat:):).

[Shelby VNT]

Just in case, the 5.9 Cummins can use one of two thremostats. The original Cummins replacement has a larger opening, which allows more coolant to flow through it. The replacements you buy at Autozone, Car Quest, ect, have a smaller opening. The original equipment Cummins thermostat is almost twice as large at the opening. Not that it will help you out, but it might be worth looking into. My stock thermostat started going bad on my 01 and I changed it out for a Car Quest piece. I have no over heating issues, and the smaller openinng really helps out a ton with engine temps in the winter. The temp is much more stable. Cummins speced the cooling systems out to be massive, for when the trucks are pulling at their max ratings. Under normal driving, the radiator is over kill, especially in the winter. Whenever my engine's original t-stat opened up, in the winter, the gauge would take a nose dive, and then take forever to get back up to 180-190. Not loaded, of course.

Regardless, it might be worth checking into if everything seems fine. Right off hand, I don't know if the Dodge replacement t-stats, available at the dealer, are the larger opening or not.