Fan clutch 'roar' when engine cold? - DodgeTalk : Dodge Car Forums, Dodge Truck Forums and Ram Forums
 
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#1 Old 02-13-2007, 11:54 AM
Damn Dirty Ape
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Fan clutch 'roar' when engine cold?

The last 2 mornings (temp=30's) I've noticed that I have a 'roar' from the fan clutch (fan) on cold startup and until I've driven maybe 1/4 mile. I've had the truck since last October and never had it do this on a cold condition. I've only heard it after letting it idle a while then usually it's only for a few hundred feet then it dies off. But that's only when it's warmed up and been idling a while.

I had the fan assembly off last week but did place it face down as noted on the fan (face down meaning opposite the side with the big nut).

Since it has never made this noise on a cold condition should I be concerned?

'06 Dodge Dakota Laramie Club Cab 4x4 w/ TRX4 Off-Road package, SoundBox, Flame Red, Auto, 3.7L .
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#2 Old 02-13-2007, 12:30 PM
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Well here in central california the morning temps are sometimes in the 30's but usually in the 40-50's. Sometimes my mechanical fan will engage for about 100 yards and then stop. Not sure why but it does.

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#3 Old 02-13-2007, 01:37 PM
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My 03 Dakota 3.9 did same thing when the first winter hit. Took back to dealer and new fan & clutch installed. Fixed the problem.
Mech said no recall or TSB but this was (at that time) the second one that he had changed.
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#4 Old 02-13-2007, 11:50 PM
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hmm.. oddly enough the past two mornings are the first times at startup in the 4 months i've had it..

'06 Dodge Dakota Laramie Club Cab 4x4 w/ TRX4 Off-Road package, SoundBox, Flame Red, Auto, 3.7L .
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#5 Old 02-14-2007, 12:44 AM
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Don't worry, that sound is perfectly normal. The fluid in the clutch settles to the bottom when the engine is off. When it's cold outside the fluid isn't very viscous so it takes a while for it to spin around and distribute evenly. The roar is the sound of the clutch fully engaging the fan until the fluid disperses and disengages the clutch. This is why it'll never do this when it is warm out.
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#6 Old 02-14-2007, 12:52 AM
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Yellow is right. If your fan clutch isn't roaring on cold starts its time to purchase a new fan clutch.

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#7 Old 02-14-2007, 01:28 AM
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Mine did it to, if you don't like it take it off, the electric fan will still run when needed, ive been running mine without the clutch fan for over a year now, and never gave me a problem.

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