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Torque Specifications for most Makes and Models
Jeff, most of the guys around here have converted their Goat trucks to electric fans, far more reliable and a bunch cheaper. Plus they can be setup to keep running for a bit after the truck is shut down to prevent residual heat build up.
If you want I can ask what they get them from, I know it's two fans from some import. One of my employees has a truck so modified.
Best of luck.
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Torque Specifications for most Makes and Models
Earthwrks,
Those torque wrench extensions are color coded according to the amount of measured maximum torque each is capable of producing. It depends on the metallurgy (chemical composition) involved.
Some metals are softer, and therefore twist a bit more than others. This twisting effectively reduces the maximum amount of torque the extension can apply to a bolt.....preventing TOO MUCH torque from being applied.
Unfortunately, there is no sure way of knowing for sure if the minimum recommended torque was ever reached. No matter which extension is used, the minimum torque applied is always suspect.
I always use the color rated at least one lower than my intended final torque specs. I then use a hand-held torque wrench for the final adjustment. This prevents a guy from having to turn a hand-held torque wrench several revolutions before reaching the desired value. I don't depend on them, but they do save a lot of time removing and replacing sockets, as they get a guy close to the desired final readings.
For extremely critical things, such as head bolts, intake manifold bolts, exhaust manifolds, etc....I don't use an air impact wrench at all. I always fear the possibility of stripping out the threads in an engine block.....especially aluminum blocks.
Joel
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Torque Specifications for most Makes and Models
Story for you.
I had my cheapie torque wrench calibrated against a precision one; it was right on. When the set torque is reached, you can keep reefing it but it just ratchets without further tightening.
Got new tires for my Supra. The tire jockey didn't notice that the rims (as well as the tires) are directional, and had to dismount and remount a couple of them. Feeling sorry for him, and wanting to ensure they weren't over-tightened, I offered to do the tightening. Set his really long wrench at 75 (he had some colored extensions but the lowest was too high), and tightened till I heard the click. To be sure, as I do with mine, I gave it another swing. Didn't know that his wrench does NOT free-wheel when the setting is reached. The sound of a wheelbolt twisting off is one I hope to never hear again.
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Torque Specifications for most Makes and Models
Joel, here's my VIN: 3D7KU28C73G793021
I called the dealer and he ran the VIN and said the clutch is electric. I looked pretty well and found no evidence of an electric clutch which would have be to be on the engine and resisted by a some sort of bracket. No wires around this area nor through the front of the fan. The drive pulley feels to be hollow--no coil or anything behind or inside the pulley resembling a clutch.
Here's the stack-up order looking front the front: Fan, then a black, thin metal, cupped "cereal-bowl" looking bezel affair that appears to capture/hold/cup/surround the aluminum-finned viscous clutch, then the pulley drive shaft. This is different than some fan drives in that the clutch is what you see first from the front, then the fan, then the drive pulley.
None of the Dodge web sites that sell parts show an accurate picture of the clutch---electric or otherwise.
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Torque Specifications for most Makes and Models
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To be sure, as I do with mine, I gave it another swing. Didn't know that his wrench does NOT free-wheel when the setting is reached. The sound of a wheelbolt twisting off is one I hope to never hear again.
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Ouch.  Very interesting though, I've never seen a torque wrench that ratchets once the set torque is reached. I've got beam wrenches, click wrenches, and a Snap-on dial wrench and none of them do that.
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Torque Specifications for most Makes and Models
Earthwrks,
You might be one of the lucky ones........
The manual I have shows the clutch going into the front of the fan. If you look at the front of the fan, the clutch is the first thing visible.
NOW.........
There's a BIG WARNING note in the manual mentioning that some vehicles have a reverse rotation fan. If your fan is one of these, it should be marked with the word "REVERSE" in bold letters. If so, you will need a reverse rotation viscous clutch to go with it.
Unfortunately, there is no diagram showing the reverse fan and clutch assembly setup. Therefore, I have no idea if this is what you have. However, I can tell you that your description of the assembly looks nothing like the photo in my manual.
You may have one of those orphans that come along between major design changes.
Joel
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Torque Specifications for most Makes and Models
Earthwrks,
I looked up your VIN number. Thanks for that. You have a 2003 Ram 2500 with the 5.9L straight 6 diesel.
When looking at the fan from the front of the truck, does your fan rotate clockwise or counterclockwise?
The picture in my manual shows your fan rotating counterclockwise, when viewed from the front....Clockwise when viewed from the driver's seat.
Joel
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Torque Specifications for most Makes and Models
Earthwrks,
Do you have air conditioning on your truck?
And are you sure your belt is routed correctly? If your belt is routed incorrectly, the viscous drive unit won't spin the fan.....even if it's working properly.
Just wondering.
Joel
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Torque Specifications for most Makes and Models
Joel, yes AC and the snow plow prep package, with automatic and 4x4. Trailer tow package too.
The belt is the original with (yikes) 94,000 miles on it. The belt was never really removed when I did the pulleys--I simply relieved the tensioner, lifted the belt off/away and left it in place. Fan spins counterclockwise facing it. I did come across something on the Net about '03's made before Jan.' 03 had a different fan clutch---but I'm not sure I read it right NOR do I know the build date (which is encoded in the VIN?). Today was fairly cold in the mid-20's when I started the engine. It sat overnite, so I tried to spin the fan by hand before starting it. The fan had some resistance and would only spin maybe half- to three-quarter turn. However when I started and idled it for about 3 minutes I could see the fan slowing down even though engine RPMs were stable. It wasn't as noisey with all the crunching sounds when it's warmed up.
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Torque Specifications for most Makes and Models
Earthwrks,
Well, you've lost me here. It seems that you have the standard fan and clutch shown in my manuals, but your description of it is quite different than the pictures I see on this end.
Oh......and there's nothing wrong with having a belt with 95,000 miles on it. Belts can last a very long time. It might not be a bad idea to keep a new belt in the toolbox, however. Better yet, someplace where it won't get chewed up.....maybe under the back seat?
I really wish I could help you find the clutch you need, but I'm afraid this one is something my manuals simply don't cover.
And here I thought I had a winner. First problem I face, I can't solve it. Life is like that for me quite often, it seems.
Joel
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