Fan Clutch???
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Tuned
Joined: Jun 2006
Posts: 338
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From: Boulder City, Nevada
Fan Clutch???
Last week I went to Yosemite National Park. While climbing a steep hill my temps went up and my fan clutch engaged. But as the temps dropped it stayed on. Even after stopping overnight when I started it in the morning in 65 degree weather it was on. It finally stopped and I disconnected the wiring harnass on top of the shroud that controls it. It didn't come on the entire way home. My question is if this is the fan clutch or could it be one of the sensors? And don't you need a 1 and 7/8 inch wrench to get it off? Thanks.
Hotshot
Joined: Aug 2006
Posts: 17,398
Likes: 317
From: Whittier, CA
Last week I went to Yosemite National Park. While climbing a steep hill my temps went up and my fan clutch engaged. But as the temps dropped it stayed on. Even after stopping overnight when I started it in the morning in 65 degree weather it was on. It finally stopped and I disconnected the wiring harnass on top of the shroud that controls it. It didn't come on the entire way home. My question is if this is the fan clutch or could it be one of the sensors? And don't you need a 1 and 7/8 inch wrench to get it off? Thanks.
Tuned
Joined: Jul 2006
Posts: 262
Likes: 2
What's funny is my truck with the inop fan (for over a year) would puke even though the temps were normal (i.e., water at 195, oil at 195) whenever getting on it. AC obviously sucked at idle but all temps were great.
As soon as I replaced the clutch it doesn't puke a drop even on my daily driver tune (hybrid race).
Even at idle the fan is spinning around 600rpms. With the bad clutch the fan sat around 300rpms and would occasionally get to 1000rpms at WOT
As soon as I replaced the clutch it doesn't puke a drop even on my daily driver tune (hybrid race).
Even at idle the fan is spinning around 600rpms. With the bad clutch the fan sat around 300rpms and would occasionally get to 1000rpms at WOT
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Tuned
Joined: Jun 2006
Posts: 338
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From: Boulder City, Nevada
The fan being on full time kept the coolant lower than normal. When the fan finally disingaged I disconnected the sensor so it would not come back on. I didn't want to have it on the entire 450 mile trip home. The engine overheated climbing steep hills and I had to stop and let the engine cool off four times. But I felt this was better than a 450 mile trip with it running. It really seems to drain power when fully engaged. I have read that being on for extended times can damage other things such as your serpentine belt. However the overheating probably didn't help either. My coolant went to 235 a couple of times and my oil maxed at about 265. Once on the open road she still pulled my 10,400 fifth-wheel at an easy 70 so I hope everthing is ok.
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