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Old 07-28-2019, 04:40 PM   #1
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Year: 1995
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Fan Clutch Question

Quick question about the fan clutch on my DT466 1994/95 model year, someone told me that the fan clutch is bad if you can spin the fan by hand with little effort on a cold engine, it's about 90 degrees today and I can easily push the fan with one finger. I have never really herd the fan really roar but twice maybe,

Also anyone bought parts from Ryder Fleet?
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Old 07-28-2019, 06:24 PM   #2
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is your bus running hot? if you are seeing your temp gauge run up to the 215-220 range and you arent hearing any fan roar then the clutch could be bad.. if the bus is always running cool.. then its likely doing its thing..


Viscous fan clutches are variable engagement.. so they ramp up... if your engine gets good and warm they should fully engage the fan and you'll hear the roar.. if the engine temp is within range and it just goes up a little.. the fan clutch may partially engage so the fan spins faster than minimum speed but may not need to fully engage..


-Christopher
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Old 07-28-2019, 07:00 PM   #3
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I was driving though Moab,UT and I was seeing temps at 210, I would immediately pull over and let it cool down, I never let it get above 210 as I know 220 is death for a DT466. I have never seen it run above 180/190, before or after that I don’t recall at the time in UT but I don’t remember the fan roar
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Old 07-28-2019, 07:50 PM   #4
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Quote:
Originally Posted by bigskypc50 View Post
I was driving though Moab,UT and I was seeing temps at 210, I would immediately pull over and let it cool down, I never let it get above 210 as I know 220 is death for a DT466. I have never seen it run above 180/190, before or after that I donít recall at the time in UT but I donít remember the fan roar
Where did you hear 220 is death to a DT466. 220 is not critical.
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Old 07-28-2019, 07:55 PM   #5
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The local bus barn, but not the were the bus came from. What is death for a dt466
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Old 07-28-2019, 08:17 PM   #6
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Quote:
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The local bus barn, but not the were the bus came from. What is death for a dt466
If it hits in the 235* range, the alarms will start sounding, slow down and let it cool. I would not be concerned unless it was maintaining 235 or above.
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