This is a great video but it doesn't look like Mike or anyone else there is answering the questions so this is to anyone who might read it. I have a 2009 HMMWV m1123, The temperature seems to hover around 210 but sometimes creeps up to where the fan kicks on. My question is, should the engine, during normal operations, run at 180-190, consistent with the temperature of the thermostat or should it run hotter and the temp be regulated by the Cadillac valve, temperature sensor and fan clutch? Thanks, Mick
I haven't heard of many engines running safely at 220-230 degrees, not sure why it's set at that high of a temp. I think ideally if it came on at 210 and stopped at 190 it would be ideal
Mike, I have replaced all components (Caddilac Valve, Time delay Module and thermal switch) and my fan clutch is still stuck in the engaged position. Bad fan clutch? Thoughts? I appreciate any help. Thanks EDIT: Fan clutch was bad.
Hi Mike, when you say fan clutch disengages, does that mean the fan itself stops turning? In the video it looks like fan is still spinning when the graphic says the fan clutch is disengaged. Thanks
the fan should always be spinning. when the fan is engaged it will spin at the same RMP as the engine. when it dis-engages is will free spin at a lower RPM
Hallo von Deutschland,mein Cadillac Ventil hab ich neu, Temperatur Sensor neu,mit Druckluft auf den Cluster auf und zu , Lüfter geht nicht mehr aus ,was kann das sein?
My 6.5 got hot today because the fan did not engage over 220. The Cadillac valve verifies good (properly engages fan clutch when unplugged from harness), but the Thermostatic Switch has no effect on fan clutch, whether plugged in or unplugged. Does that confirm that the thermostatic switch is bad? Also, shorting the A & B wires on the harness also does not effect the fan clutch.
Thanks alot for the vid big help my HMMWV was getting warm after about a hour driving it i would turn on the heater so today same thing happened i unplugged the wires for the clutch and it engaged so that works i am thinking the thermo switch is bad gonna order one of those but both wires are black how do I tell which one goes where?
This was a clear, well-made video. Thanks.
The cleanest engine I have seen and good illustration.
Thanks Mike! Great explanation, very helpful.
Nice visual and verbal explanation. One of the better videos for the DIY'rs.
Thank you for making this!
This is a great video but it doesn't look like Mike or anyone else there is answering the questions so this is to anyone who might read it. I have a 2009 HMMWV m1123, The temperature seems to hover around 210 but sometimes creeps up to where the fan kicks on. My question is, should the engine, during normal operations, run at 180-190, consistent with the temperature of the thermostat or should it run hotter and the temp be regulated by the Cadillac valve, temperature sensor and fan clutch?
Thanks, Mick
I haven't heard of many engines running safely at 220-230 degrees, not sure why it's set at that high of a temp. I think ideally if it came on at 210 and stopped at 190 it would be ideal
Good info. Diagnostic in minutes.
Thanks Micheal, really priceless info.
Mike, I have replaced all components (Caddilac Valve, Time delay Module and thermal switch) and my fan clutch is still stuck in the engaged position. Bad fan clutch? Thoughts? I appreciate any help. Thanks EDIT: Fan clutch was bad.
Great video, thanks Mike!
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great video!
Good vid, and cleanest hmmwv I've ever seen, I'll be sharing sis with my young Amn learning armor mx
Hi Mike, when you say fan clutch disengages, does that mean the fan itself stops turning? In the video it looks like fan is still spinning when the graphic says the fan clutch is disengaged. Thanks
the fan should always be spinning. when the fan is engaged it will spin at the same RMP as the engine. when it dis-engages is will free spin at a lower RPM
Does this test need to be done on a cold engine? If it was already hot wouldn't it be engaging either way?
Nice video. Great information.
Can you show the replacement of the clutch itself? I need help. Lol
Hallo von Deutschland,mein Cadillac Ventil hab ich neu, Temperatur Sensor neu,mit Druckluft auf den Cluster auf und zu , Lüfter geht nicht mehr aus ,was kann das sein?
Is there a way to test the TDM to know if it’s bad or good?
My 6.5 got hot today because the fan did not engage over 220. The Cadillac valve verifies good (properly engages fan clutch when unplugged from harness), but the Thermostatic Switch has no effect on fan clutch, whether plugged in or unplugged. Does that confirm that the thermostatic switch is bad? Also, shorting the A & B wires on the harness also does not effect the fan clutch.
Same happens to my humvee
Unplug thermostatic switch does not affect fan clutch , any suggestions?
Thanks alot for the vid big help my HMMWV was getting warm after about a hour driving it i would turn on the heater so today same thing happened i unplugged the wires for the clutch and it engaged so that works i am thinking the thermo switch is bad gonna order one of those but both wires are black how do I tell which one goes where?
Damn. My m1151 is completely different. My fan stays on