-93' W350 / auto
After several trouble-free days of very hot heavy (25,000k) towing, a long uphill in low range nearly spiked the factory guage in the cool of the 5:30 am. Gauge had never risen over 1/2. I don't remember hearing the 'roar' of the fan, but it had been fine, and also did ok on way home last night (3 mile 7% grade) The door panel is off, so when the fan engages, it pressurizes the cabin with very hot air coming through the door.

Is there a way to test the fan clutch?
Are these strictly Thremo Hyd? (it almost sounds like elect clutch engages as noise changes so much)

cummins number for fan clutch? (I see a dodge # in Tech section)

Need to make a 200 mile Heavy run tomorrow (Friday)
janb

 

If theres oil coming out of it at all then its bad!

When my fan acted up i had been pulling the hill for a will, fan roaring and guage good. then just before the steepest part of the hill the fan cluch stopped roaring and the guage was starting to climb and it got rill warm before the fan started to ingage again. the fan stayed ingaged all the rest of the way but the guage didn't come down untill i was going down the ether side of the Mountion!

If you deside to replace the fan clutch, replace the fan and fan clutch with the updated ones Fan- 52028653
Clutch module- 52028760

I wish that i could us this set up but its only for the intercooled ones

 

no oil out of this area, feels good, (no play, moderate drag) but was 'free' wheeling / intermittantly slowly engaging with guage fluke (I'm wondering about gauge...since everything else Dodge wired on this thing is flakey) I will carry my wife's meat thermometer on my next trip, till I have time, and can afford a 'real gauge'.

the fan clutch worked well, engaging at least 20 times on the trip home last night.
but... upcoming 'freeway' trip is worrisome,

 

Was this high gauge reading shortly after starting the truck? My old thermostat would let the temp get pretty high before it would open the first time.

 

happened ~1hr into the drive

 

I had the same issue, I installed a real elec gauge into the port under the therm, in housing, behind alternator, Found that stock gauge or sender was faulty!
Peter.

 

ok, are you SUPPOSSED to hear the fan roaring???? I thought that was an indication the fan clutch was going .....
Mine occasionally sounds like a plane trying to take-off.....is that normal???
uassually after and hour or so of heavy towing or high speeds on the highway in hot weather....

 

Yes when the temp is cllimbing and the fan is not roaring and thats when you now you have a problem with the fan clutch

the guage can stay at normal on the guage and have the fan roaring.
the fan turns on by how much heat is travaling thru the fins of the radiator and heating up the fan clutch, so the temp, on the guage, don't need to go up, for the fan to kick in.

if the fan don't dissingage at all,.... say going down hill at freeway speeds then it is bad and you could gain some fuel milage by replacing it!

these fans take hp when inguaged!

 

Like you, I too haul 25-26k on a normal basis now. I can deff hear my fan clutch kick in, but the temp guage is very high when it does. I have a manual temp guage on her for a while, and I found that my factory guage showed pretty close to H, and I was only around 190 or so.

Also, mine does the same thing as far as cooling, I dont notice any decrease in guage temp when my fan kicks on, but the temps dont rise either.