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Quattro
Dodge Dakota
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7/15/2003
14:30:55
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 Subject: Loud Fan noise...intermittent at best
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Message:
Hey all, this might be a typical truck thing, or a result of a clutched fan...but about 1 out of every 7 times I start my 2000 V6, it sounds as though there is a HUGE fan running in the engine bay. My truck sounds like it's ROARING. Then, after a while, it goes away, and the truck is quiet again. Is this normal? What is it?
BTW- doesn't depend on temperature...it will do it from a cold start-up, or after it's been running.
Thanks
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bdholsin
Dodge Dakota
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7/15/2003
15:17:30
|  RE: Loud Fan noise...intermittent at best
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Message:
Sounds like your fan clutch has what is called "morning sickness". The viscous coupling in the fan is in the open position at shutoff. The sound you can hear, best described as a growl, is the fluid being pumped out of the fan clutch cavity. I have the same problem on my '97 3.9L Dakota. Let me guess...when you start it up and drive the sound is present until you hit second gear then it goes away until you shut off the vehicle.
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Shank
GenII
7/15/2003
20:52:11
| RE: Loud Fan noise...intermittent at best
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Message:
Fair wear & tear, Be worried when it no longer does this. My Jeep did it for about 80,000 Miles before my wife fipped it.
Oh, btw..... She doesn't touch the Dak!
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Quattro
Dodge Dakota
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7/16/2003
09:25:45
| RE: Loud Fan noise...intermittent at best
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Message:
Actually, it doesn't sound like a growl at all...it sounds like a large fan. To me anyway...
But, I hear Jeeps go by that make that sound all the time...like there is a big fan running.
Anyhoo, if it isn't serious, I won't sweat it. It's just hard to pinpoint WHEN it will happen...so I can't figure out a cause.
Q
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Geoff
GenIII
7/17/2003
16:38:54
| RE: Loud Fan noise...intermittent at best
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Message:
Mine did that so i removed it. Did'nt need it anyway. Truck has still never overheated even in traffic
Geoff
2000 3.9L RC Sport. Flame Red. 5-speed, 3.55, Airaid, Vortex Muffler, F&B 48mm TB, 180 T-Stat, Autolite 3923s, IAT Adjuster, Clear Corners, SS Grill Insert, JBA Plug Wires, Underdrive Crank Pulley. Hurst Shifter, Removed Clutch Fan, Sony CDX-MP450X MP3, JBA Headers
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daksprt4x4
Dodge Dakota
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7/17/2003
20:41:03
| RE: Loud Fan noise...intermittent at best
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Message:
geoff i was thinkin of removing my clutch fan too. my truck is almost modded the same as yours im just worried bout it overheating. where do u live that yers runs ok
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ACRucrazy
Dodge Dakota
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7/21/2003
22:23:51
| RE: Loud Fan noise...intermittent at best
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Message:
My 00 v6 does the same thing...its definatly the fan...on startup...stays engaged till past 2nd gear...has less than 30k miles on the truck...thinking of removing it.
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billco
Dodge Dakota
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7/21/2003
23:53:09
| RE: Loud Fan noise...intermittent at best
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Message:
01 CC 3.9 does the same thing and my 97 5.2 CC did the same thing. My 01 seems to do it for a few minutes when the air is a little damp. The clutch works by shearing a viscous fluid, the drag from which couples force from the driving shaft to the driven hub. The clutch consists of two sections, a fixed drag section that provides a minimum level of torque and a variable drag section controlled by a bimetal thermostatic coil visible from the outside. When the air is damp I think it causes the viscous fluid the thickenand cause increased drag and maybe combined with road crud and corrosion on the firct part creates enough drag to cause the fan to drive at engine speed.
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