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I did notice my new t stat was slightly longer ZZ4x4 like maybe a civi version. (Bought from Napa) Ordering a Humvee one now. What is proper orientation? I put mine in the way I took it out but may have been wrong all along. I will get my fan switch off and test in water like mentioned. And...

Thehummerguy it's funny how temperamental these are for such a built machine. I'm a few posts away from starting a 4bt build thread.

ZZ4x4. I deffenetly have a failed something since I am overheating and fan does not turn on ever. When I unplug the TDM with the truck overheating the fan slides 1/4 forward and roars. Plugging the TDM back in when it's still hot disengages the fan. I just need to figure out why and where the...

T stat is new. Cap holds pressure and dosnt leak when hot but I will replace. I'm going to get into it and overhaul the coolant system. Are cracked cylinders or head gaskets a huge issue on these 6.2 vs the 6.5 issues? I'm not seeing or smelling burnt coolant so hopefully it's not damaged. Fan...

Update. Ran up over 240. Pulled over while running fan was not on. Unplugged TDM and fan turned on. Limped home but temps never really came down. Ended up boiling off quite a bit of anti freeze. Got home cooled down and topped fluid back off (3 gallons) Had out today with fan unplugged and temps...

Going to order a TDM. It's been staying at around 219 will driving. I still can't hear or tell if the fan is ever coming on to keep it there or if the radiator is just doing its job and it's not getting hot enough for the fan

To clearify we own a private beach house on private roads. The Humvee lives out there. I unplugged the time delay module tonight and the fan kicked in. After hearing the fan I can't say that I've heard this come on while driving. Would a bad time delay module cause the fan to not engage and the...

Driving home tonight. Temps where in the 200-220 range. But any long periods of idling or moving slow and temps creep up.

Nine! Nice! I've read from a few places that temps in the 230's isn't bad. What are your temps like in summer months just cruising around? Do you ever have any over heating issues? Mine hit 240 so I question what the fans doing.

ill check the fan tomorrow and see if it kicks in when it's supposed to and functioning. I'll post tomorrow when I got some more info. Thanks

Driving around it stays at about 200. It shouldn't be running 240 in this weather not being abused. It seems like every time I open the hood the fan is spinning. I'll do a coolant flush just to be sure fluids are good. Old t stat was a little crunchy. I'm considering running a top aux fan since...

Isn't the 6.2 a belt driven fan off the motor?

1993 Humvee with 17k. Replaced thermostat suspecting old one was stuck. New NAPA one I believe it's a 190. Seemed fine for last couple days driving around about 40 mph weathers been in the 50's. Same weather today driving on the beach slower speeds, humvee gauge reads 240. Is this normal for...