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XLTSPCL
Dodge Dakota
8/15/2001
10:17:28
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 Subject: 4.7 Clutch Fan Removal
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Message:
What's the easiest most hassle free way of removing the clutch fan? I know this ain't going to increas HP a huge amount, but what kinda numbers we looking at, 2-5HP?
Thanx
2000 4.7L 5speed CC 4x4
3923s, RS Gen II 180 T-Stat, Flowmaster 3" Cat-back 50 Series Delta-flow
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Jeffster
Dodge Dakota
8/16/2001
02:04:20
|  RE: 4.7 Clutch Fan Removal
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Message:
I took a small 2" clamp and tucked it over the lip of the pulley and tightened it. The pulley them jammed itself against a bolt right above the pulley and stopped it from spining when I lossened the fan clutch assembly. Don't worry about finding a nut to put back over the pulley it's welded or pressed permanently to the water pump shaft.
Does make a small dif. Idles very smoothly also.
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XLTSPCL
Dodge Dakota
8/16/2001
10:17:07
| RE: 4.7 Clutch Fan Removal
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Message:
So basiclly just jam up the pulley some how then take the large nut off the front? Do you clamp right on the pulley? Did you take your serpentine belt off first? Is the nut counter threaded?
Thanx Jeff
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Jeffster
Dodge Dakota
8/16/2001
20:29:36
| RE: 4.7 Clutch Fan Removal
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Message:
No I left the belt on and yes the bolt was actually a threaded post. I assume you saw the one I am talking about Just slip the c clamp around the back flange of the pulley and tighten it. The Clutch fan was not tourqued on that tightly, it was actually quite loose. I also wired a switch to my fan circuit so I can have it run contiuous if I want. The PCM won't tell it to turn on untill the temps get to around 195-205*
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XLTSPCL
Dodge Dakota
8/17/2001
12:08:18
| RE: 4.7 Clutch Fan Removal
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Message:
Thanx Jeffster. I'll give it a try and post my results after I'm done.
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WhiteOn
Dodge Dakota
8/17/2001
18:48:50
| RE: 4.7 Clutch Fan Removal
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Message:
I just removed clutch fan on my '01 4.7. Took 30 seconds. I simply put a vise grip on the pulley and a pipe wrench on the nut. The nut was not tight at all, and I just turned the fan to spin it clear off. The worst part was putting away my drop light. Will report tomorrow on how the temp gauge behaves.
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WhiteOn
Dodge Dakota
8/18/2001
12:18:36
| RE: 4.7 Clutch Fan Removal
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Ok, I took her out for an hour drive in the mountains through twisty roads and steep uphill interstate highway where many vehicles overheat. The temp gauge stayed right where it has always been. I don't see any change so far. This wednesday will be the true test since we are going on a 4x4 trip. I will keep the clutch fan in the truck just in case I need to re-install it. Has anyone done any low gear 4 wheeling with the clutch fan removed? If so how did the temp look and how did the electric fan perform?
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Jeffster
Dodge Dakota
8/18/2001
20:05:02
| RE: 4.7 Clutch Fan Removal
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Message:
White on did you know your fan will turn itself on automaticaly at around 200* I let my truck idle on a hot day to see if the fan could keep up without using my auxillary switch. The electric fan produces very significat airflow and shouldn't be a problem. The temps may however run a little higher than you want but it won't go past halfway on your temp gauge.
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WhiteOn
Dodge Dakota
8/18/2001
20:35:16
| RE: 4.7 Clutch Fan Removal
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Yes I did, and today I did an idle test to see what the electric would do. It would switch on and run for about 30 seconds. I could see the temp needle go down during this time, then it would switch off and not come on for a few more minutes. I also took a short trip down to Denver and spent some quality time in stop and go heavy weekend traffic. The temp never reached the halfway mark. I'm becoming convinced that this thing is going to work out fine. We'll see when the Dak is working hard at low speed while rock crawling. I don't really need to keep the temp down too much since I'm not doing any racing, so maybe it will work out perfect the way it is. Thanks for your comments Jeffster.
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umStefa
Dodge Dakota
8/20/2001
09:09:38
| RE: 4.7 Clutch Fan Removal
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Message:
Anybody tried to wire in a temperature sensor so that the fan kicks in earlier?
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ken encinas
Dodge Dakota
8/21/2001
18:13:54
|  RE: 4.7 Clutch Fan Removal
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Message:
You can have the computer custom flashed to kick in at a lower temperature. I Dont know if the dealer will do it but KRC performance was telling me they can.
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WhiteOn
Dodge Dakota
8/22/2001
17:21:02
| RE: 4.7 Clutch Fan Removal
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Message:
Back from a nice little 4x4 trip up to and around Loch Lomond Colorado. This was a great test for my temp gauge after clutch fan removal, and I'm happy to report that all went well. The electric kicked in and ran a bit, but only about 1/3 of the total time spent rock climbing. I now feel confident with the removal of the fan and the ability of the electric to keep things cool. I'm not planning any other changes in this area since the gauge didn't get quite to the halfway mark and the truck ran great.
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sandman
Dodge Dakota
8/22/2001
17:33:19
| RE: 4.7 Clutch Fan Removal
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Message:
Your clutch fan is only operation at speeds below 30 Mph. I could see unhooking for drag raceing but what do you hope to gain in off raod and daily driver roles. Those 2-5 hourses are not going to make or brake you stop light to stop light raceing or increase your rock crawling power in any significant amount. Before clutch fans and flex blades you lost 10-15 hp.Are you are of how much shorter the life of you fluid could be if temp increase just a little bit? I also would not want to bet my engines longevity solely on eletric fans. Just thought I would throw this in!!! P.S. This is a mod that could void warranty and has potential to cause systemic damage to almost all systems.
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WhiteOn
Dodge Dakota
8/25/2001
01:44:00
| RE: 4.7 Clutch Fan Removal
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Message:
I'm really not looking for any gains in hp since I am not in the drag racing mode, although my Dak seems to have a bit more punch. What I have gained is NO NOISE from the fan. If I have a 195 degree stat and the electric kicks in at 200, what is the problem? The electric quickly cools, even under slow rock crawling 4x4 activity. So what are all of the "systems" that are going to be damaged by these 5 degrees?
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Waltherone
Dodge Dakota
JOIN HERE
12/04/2002
19:30:18
| RE: 4.7 Clutch Fan Removal
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Message:
Reviving an old thread to save some bandwidth--I know the bolt is regular right hand threaded, is that facing the front of the truck or rear tho? If I am in front of the truck looking at it (where drivers side is on my RIGHT) I turn the bolt counter clockwise?
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Lab Rat
GenIII
12/04/2002
21:05:13
| RE: 4.7 Clutch Fan Removal
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Message:
Yup. Give it a good whack with your right hand and presto! off it comes.
LR
Gibson Dual Sport, AirForce One air intake, Jet II, Jet TBS, 180 stat, IAT, TPS, no viscous fan, Lakewood traction bars, "Wilson" antenna ball...when are we gonna see some real parts??!!
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FredDQC
Dodge Dakota
JOIN HERE
12/04/2002
21:41:50
|  RE: 4.7 Clutch Fan Removal
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Message:
I did remove the clutch fan but left the clutch in just in case. I have seen pulleys fly off even with screws on them. It doesn't hurt and it is a good safety measure.I wasn't looking to gain anything but sure I'm glad I don't get that Fighter Jet noise when taking off in the mornings. The only risk I see is if you electric fan fuse breakes, then you will have little time to stop and avoid overheating. It happened to me once. The temp gauge when all the way up in a matter of seconds! not on my Dak though! thanks God. It was my wife's minivan. For those few seconds, I had to replace the head gasket;So I always carry extra fuses and wires just in case I had to connect it direct to make it to my destination.
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Lab Rat
GenIII
12/04/2002
22:01:12
| RE: 4.7 Clutch Fan Removal
IP: Logged
Message:
Fred,
It's on a 4.7. It will not come off. It is the same water pump and fan assy. as the 3.7 in the KJ. The KJ comes from the factory with no fan.
Comprende??
LR
Gibson Dual Sport, AirForce One air intake, Jet II, Jet TBS, 180 stat, IAT, TPS, no viscous fan, Lakewood traction bars, "Wilson" antenna ball...when are we gonna see some real parts??!!
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Waltherone
Dodge Dakota
JOIN HERE
12/04/2002
23:52:41
| RE: 4.7 Clutch Fan Removal
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Message:
Alright thanks! Now that the houston weather finally dropped ( a lot) I'll probly remove that tomorrow morning--do you have to remove the shroud to get the fan out of there or can you squeeze it thru? Looks like it might be able to squeeze thru but I don't want to bend half my radiator fins in the process..
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Texas Todd
Dodge Dakota
JOIN HERE
12/05/2002
08:24:28
| RE: 4.7 Clutch Fan Removal
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Message:
Fred,
If yo uhave a 4.7, uh, well, what an *%%&^ for leaving the clutch, NOw you still have that rotating mass. That pulley will not come off! Mine would have already.
Walt,
I live in the HOuston area. Mines been off two summers now. I do have a 180 tstat. With the a/c on, your elec fan is on at ANY temp. Without the a/c on, it kicks on when the gauge is about 1/3 the way over. (I don't know where people get a temp for this unless they hook a seperate gauge up with temps on it. My 01 4.7, has no temps on the gauge). Anyway, in the winter, even stuck in traffic without the a/c on, it never gets hot.
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Waltherone
Dodge Dakota
JOIN HERE
12/05/2002
10:54:17
| RE: 4.7 Clutch Fan Removal
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Message:
Nifty, Todd you ought to come over to
http://forums.delphiforums.com/dakotart some time
It's an R/T forum, but there seems to be a large population of Houston guys that all know each other, and a few 4.7's (me and one other guy that I know of..)
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Texas Todd
Dodge Dakota
JOIN HERE
12/05/2002
10:57:25
| RE: 4.7 Clutch Fan Removal
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Message:
Fron the above post, I also have the Trailer tow and H.D. engine service group, which I just found out apparently comes with a H.D. radiator.
01, 4.7, 5spd manual, HO cams, QC-slt,
NO viscous fan/clutch, homebrew intake, ported TB (68stock), 180tstat, leer shell, etc.
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kevster
Dodge Dakota
JOIN HERE
12/08/2002
09:59:10
| RE: 4.7 Clutch Fan Removal
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Message:
Ok I read this forum on clutch fan removal, I just removed mine from my 02 quad cab 4x4 ,4.7, I will install a regular nut from Lowes Hardware today, just for safety. I have a 180 T -stat also. I will see how the fan off works, but I was just thinking.... Why not install a smaller blade fan on the clutch and just reinstall the fan assembly, the factory fan is big i have seen fans alot smaller, this sounds like a better way to go..Whatch all think??
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Texas Todd
Dodge Dakota
JOIN HERE
12/08/2002
17:29:46
|  RE: 4.7 Clutch Fan Removal
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Message:
Kevster,
Nadda,
It don't get much hotter than where I live, or the traffic much worse.(Houston area)
1. It's NOT a faith thing, the pulley will not just come off! YOU DON'T NEED NO NUT
2. If you're running the A/C, THE ELEC FAN IS ON! Even at start-up! It's hard wired that way. It also comes on with a termostat setting, when the gauge is almost half way from the bottom.
3. If you want a smaller fan, than why bother? And if you're going to remove it, and I think you have, DON'T make the mistake of leaving the clutch on the pulley.
I too have the 180, no belt/clutch fan, two summers, towing my sailboat, NO PROBLEMS
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Lab Rat
GenIII
12/08/2002
18:39:25
| RE: 4.7 Clutch Fan Removal
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Message:
I agree with Todd and I'll say it one more time-the same water pump and pulley are used on the KJ 3.7. It comes from the factory with no fan, no clutch, no nut, no problem.
I'm just north of Todd in Big D which historically is hotter than Houston (the humidity in Houston keeps the ambient down) and I've had zero problems.
LR
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CW
GenIII
12/08/2002
18:47:25
| RE: 4.7 Clutch Fan Removal
IP: Logged
Message:
If you look close at the hub the nut will not prevent the pulley from falling off even if the pressed on pully did fail.
4.7 HO, CW style
2001 4.7 5sp 3.92 LSD
Ported 68mm TB, IAT adjuster, 3" flowmaster cat back, TPS @ .76V, 4" Z-tube, Roadmaster active suspention, Removed Third cat, Electric fan Convertion, HO cams, Robert shaw 180 therm, HO intake manifold.
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kevster
Dodge Dakota
JOIN HERE
12/08/2002
20:16:02
| RE: 4.7 Clutch Fan Removal
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Message:
Ok, I guess I will not worry, and just go for it, I am in Washington State and it doesnt get to hot here. What is the KJ 3.7? I dont know..
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.alex.
Dodge Dakota
JOIN HERE
12/08/2002
20:30:51
| RE: 4.7 Clutch Fan Removal
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Message:
The KJ is the new Jeep Liberty wiht the 3.7 V-6 that doesn't come with a clutch operated radiator fan and also doesn't come with a damn NUT holding on the water pump pulley because it's pressed on at the water pump manufacturing facility. Let's put it liek this..... if the pulley comes off the front of the water pump, you had much larger problems right before that anyway. Like the whole water pump came apart or soemthing.
I've had nothing on the front of that pulley for about 25,000 miles so far...... pump still pumps water and the motor runs cool like the breeze here in the Atlanta heat.
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AC 2000 4.7L
Dodge Dakota
JOIN HERE
7/10/2003
16:46:39
| RE: 4.7 Clutch Fan Removal
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Message:
Sorry to bring back an old thread but...
Todd, I have read your posts about running your 4.7 without the clutch fan for the last 2 summers without any overheating problems. And I realize that a 180 t-stat should be installed at the same time, which I will do as soon as I can locate one. But, I also noticed from your other posts that you have the HD cooling package that came with your tow package. I do not have the HD cooling package :( Have you had any feedback from folks with a normal cooling system?
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Lab Rat
GenIII
7/10/2003
16:55:10
| RE: 4.7 Clutch Fan Removal
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Message:
No HD cooling package on mine, well into second Texas summer and no problems whatsoever. I know it's hard to accept taking your fan off, I was doubting it at first but the electric fan moves a tremendous amount of air.
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TexasTodd
Dodge Dakota
JOIN HERE
7/10/2003
17:04:57
| RE: 4.7 Clutch Fan Removal
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Message:
AC,
Nice of the Lab Rat to give his testimony.
I've seen others post, that because of the uncertainty of the procedure, they kept their fan with them for awhile, cause it threads back on i mere seconds, no tools required, as the turn of the engine keeps it tight.
Good luck
Todd Bouton
01, QC, 4.7, 5spd, HO cams AND intake, homebrew cold air intake with air damn, no belt clutch/fan, ported 68mm TB, new 3923 plugs,
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