Fan clutch/engine temps

NyCowboy87 · Jul 3, 2017

Does anyone know what the spec is for fan clutch engagement? Seems like mine is almost always on especially hauling my big trailer and horses (15k lbs). I put my scan tool on it this weekend and of course can only monitor engine oil temps, but anything over 208* the fan comes on. The idiot water temp gauge doesn't seem to move toward hot before the fan comes on and it's getting a bit annoying between the fan noise and this 38r.

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Denver · Jul 3, 2017

In my 02 Superduty it will come on around 218-220. Reading from a coolant gauge on the pillar and getting temperature from the port on the water pump at the upper hose. I did have the same gauge on my 95 OBS and I don't recall the fan ever speeding up or the temp going above 215. That truck had the older all metal radiator setup.

NyCowboy87 · Jul 3, 2017

Hmm makes me wonder if my water temps are getting that hot. Do you have any data comparing water temp to oil temp? I know my oil temp didn't rise over 214 while I was watching it. I always figured oil temp would be higher than water temps.

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Denver · Jul 3, 2017

No oil temp data.

Optimator82 · Jul 3, 2017

I just got rid of the problematic thermal fan clutch a few weeks ago on my truck and replaced it with an electric fan clutch from Horton (Horton EC-450). My stock fan bolted right up to the electric fan clutch too. One of the best upgrades I've made to my truck.