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Unread 03-24-2009, 03:34 PM   #1
fortknox
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2007 WK 
 
Join Date: Mar 2009
Location: Lake Placid, FL 33852
Posts: 48
Clutch Fan Removal

Is there anyone on the board that has removed the clutch fan from their 4.7L? I remember on the old 5.9 dakotas you could remove the clutch fan and the a/c fan would still kick on to cool the engine as a secondary backup unit. Has anyone done this with their Grand Cherokee?

I would think it would be fairly simply and definitely help free up some rotating mass meaning more hp and better gas mileage.

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2008 Suzuki M109R
1800CC 2Cyl, 5Spd, 240 Rear Tire, Lots of Chrome!

2007 Jeep Grand Cherokee Laredo
4.7L V8, RWD, 3.91 Rear, Tow Pkg, E3 Spark Plugs, Superchips 91 Octane Tune

1996 Chrysler LHS
3.5L V6, FWD, Crane Firewire Spark Plug Wires, Custom AEM Dryflow Intake, E3 Spark Plugs, Main Cat Deleted
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Unread 03-25-2009, 03:48 PM   #2
johnniebravo
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2008 WK 
 
Join Date: Sep 2002
Location: Bristow, VA
Posts: 843
I don't think we even have a clutch fan on the WK, I know my CRD doesn't.


edit: i assumed we had the traditional belt driven clutch fan. Its there but a little different than i expected.
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Last edited by johnniebravo; 03-25-2009 at 06:33 PM..
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Unread 03-25-2009, 04:07 PM   #3
JOHNRAMBO
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2005  
 
Join Date: Nov 2008
Location: WINDHAM MAINE
Posts: 22
We Do! Have A Clutch Fan!
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Unread 05-04-2009, 01:05 PM   #4
fortknox
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2007 WK 
 
Join Date: Mar 2009
Location: Lake Placid, FL 33852
Posts: 48
Just rekindling this message since i never got an answer.

Oh and does anyone make an underdrive pulley? or pulley set?
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Jason

2008 Suzuki M109R
1800CC 2Cyl, 5Spd, 240 Rear Tire, Lots of Chrome!

2007 Jeep Grand Cherokee Laredo
4.7L V8, RWD, 3.91 Rear, Tow Pkg, E3 Spark Plugs, Superchips 91 Octane Tune

1996 Chrysler LHS
3.5L V6, FWD, Crane Firewire Spark Plug Wires, Custom AEM Dryflow Intake, E3 Spark Plugs, Main Cat Deleted
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Unread 06-14-2009, 08:07 PM   #5
sanitarium16
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2007 WK 
 
Join Date: Apr 2008
Location: New York
Posts: 82
im interested in this as well
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Unread 06-15-2009, 11:40 AM   #6
BlueSteelJP
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2005 WK 
 
Join Date: Apr 2009
Location: Maine
Posts: 257
Yes, I needlesly replaced mine on my WJ, since they are both 4.7 liters they are similiar. Chrysler has a special tool for this but if you cannot get the tool your best bet for removal is probably the hammer and crescent wrench. With the pulley belt still on, get a large crescent wrench and grip the large fan clutch nut. You will need to hit it several times to knock it loose. The trick to finding out which way the nut needs to turn is to watch which way the fan spins while the engine is on. Hit the nut the same way the fan spun. My fan spins counter-clockwise, thus, the nut broke loose by me hitting it counter clockwise. Once you break the large nut loose, unthread it all the way and set it down in the fan shroud. I got this from another site and it worked for me.

Tool:

http://getmetools.com/schley.html


Schley 99800 - Pulley Holder Water Pump / Fan Clutch for GM / Chrysler: $53.38
Quantity: Check out now

• This specially designed tool is used on vehicles using pressed on pulleys. These pulleys have holes instead of bolt heads for use in securing the pulley from rotating while removing or installing the fan clutch assembly. With the use of a 36mm open end wrench part #88550, #93260 or #95210 the technician can loosen and tighten the fan clutch on many 1999 and later GM trucks, vans and SUV's. Many 1998 and later Jeeps. Also many 1998 and later Dodge trucks, vans and SUV's.
Used on the Following Applications:
GM 4.8 Liter V-8, 5.3 Liter V-8 and 6.0 Liter V-8 1999 and Later
Chrysler, 3.9 Liter V-6, 4.7 Liter V-8, 5.2 Liter V-8, 5.9 Liter V-8, 8.0 Liter V-10 1998 and Later.
Chrysler engines using factory replacement water pumps for the following engines; 3.9 Liter V-6, 5.2 Liter V-8, 5.9 Liter V-8 1993 and Later Also, 8.0 Liter V-10 1997 and Later
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