Hmmwv overheating 220-240

[Rob T.]

If the fan is on all the time your fuel consumption will go up and you will loose some horsepower
Check the time delay, if the insulation on the wires is failing, you should replace it.
Make certain when you replace the thermostat that you get all of the air out.
Also check the coolant surge tank, remove the small coolant lines to check if the nipple is blocked, that is also a common problem
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Thank you very much. Also had an overheating problem with my 6.5 engine. One of the nipples was blocked with a little cord of silicone. Hope the problem is gone now. Still have to test it.