Fan clutch question...
#13
#14
OK... I've got an update...
Drove to the office (5.25 miles) yesterday... outside temps were in the low/mid 60s. Temp on the UG got up to 201 at one point. When I had my foot on the gas and moving temps went back down to 195 to 197.
I replaced the Viscous fan last night and drove in to the office this morning. Temp didn't get above 194 and was mostly around 188 or even lower for the majority of the ride... with similar outside temps.
Now I have a question. Why have a viscous fan anyhow? Why isn't it just fixed (always spinning 100%) like my old jeep? Cold climates?
Drove to the office (5.25 miles) yesterday... outside temps were in the low/mid 60s. Temp on the UG got up to 201 at one point. When I had my foot on the gas and moving temps went back down to 195 to 197.
I replaced the Viscous fan last night and drove in to the office this morning. Temp didn't get above 194 and was mostly around 188 or even lower for the majority of the ride... with similar outside temps.
Now I have a question. Why have a viscous fan anyhow? Why isn't it just fixed (always spinning 100%) like my old jeep? Cold climates?
#15
I replaced my Hayden HD clutch two days ago. I had the same temps and same result! The clutch was plenty viscous hot and cold. I couldn't spin it more than half a turn by hand. I can only assume the thermostatic spring on the front of the clutch had failed and it was not engaging fully. Very strange. The HD clutch should have lasted more than a year and a half.
#16
OK... I've got an update...
Drove to the office (5.25 miles) yesterday... outside temps were in the low/mid 60s. Temp on the UG got up to 201 at one point. When I had my foot on the gas and moving temps went back down to 195 to 197.
I replaced the Viscous fan last night and drove in to the office this morning. Temp didn't get above 194 and was mostly around 188 or even lower for the majority of the ride... with similar outside temps.
Now I have a question. Why have a viscous fan anyhow? Why isn't it just fixed (always spinning 100%) like my old jeep? Cold climates?
Drove to the office (5.25 miles) yesterday... outside temps were in the low/mid 60s. Temp on the UG got up to 201 at one point. When I had my foot on the gas and moving temps went back down to 195 to 197.
I replaced the Viscous fan last night and drove in to the office this morning. Temp didn't get above 194 and was mostly around 188 or even lower for the majority of the ride... with similar outside temps.
Now I have a question. Why have a viscous fan anyhow? Why isn't it just fixed (always spinning 100%) like my old jeep? Cold climates?
Mostly fuel economy, it reduces engine load. there are a few other benefits but they are mostly kinda of vague.
#17
#18
I believe the aux fan not running and not really being cold enough out to crank the heat, thus also cooling the system, is what brought the issue to light. The new HD clutch seems to have been the easy fix. Again, my fan was plenty viscous hot and cold. It did not freewheel at all by hand.
#19
They vary but do not really fully disengage, How thermal Fan clutches work as to temp most engage at about 170° - 190 radiator air temperature, (about 30° lower than coolant temperature). But the best bet is to check the specs for the one you have
#20