Home » Public Forums » GMCnet » Oh, Sure, Another Fan Clutch
| Oh, Sure, Another Fan Clutch [message #246772] |
Tue, 08 April 2014 11:30  |
George Beckman
Messages: 1085
Registered: October 2008
Location: Colfax, CA
Karma: 11
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We went to Fort Bragg, CA, last month and I occasionally heard a noise that sounded "fan belt" related. A "twinging" sound. I even checked the level on the power steering.
We just got back from another short jaunt. As we started the 190 mile trek home, I heard the noise and bothered to check power steering. Full.
The noise shut up and so we went on. About an hour later the fan clutch engaged. I checked the engine temp and it was absolutely normal. The clutch roared and then went to half speed and then got quite.
Maneuvering in yard comprehension came to me. The twining and twanging was constant. Fan clutch. When I shut it down it rattled on for about 10 seconds. A quick estimate says this one lasted about 2200 miles. I can't wait to lay on my belly board and change it.
'74 Eleganza, SE, Howell + EBL
Best Wishes,
George
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| Re: Oh, Sure, Another Fan Clutch [message #246796 is a reply to message #246795] |
Tue, 08 April 2014 15:51  |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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Senior Member |
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Discovered quite by accident, one of the shelves from my Ikea shelving unit fits perfectly in the engine hatch opening. It could almost be passed as designed for it. Great belly board.
Tom, MS II
2012 Phoenix Cruiser model 2552
KA4CSG
[Updated on: Tue, 08 April 2014 19:25] Report message to a moderator |
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| Re: Oh, Sure, Another Fan Clutch [message #246813 is a reply to message #246772] |
Tue, 08 April 2014 19:12 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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| George Beckman wrote on Tue, 08 April 2014 10:30 |
We went to Fort Bragg, CA, last month and I occasionally heard a noise that sounded "fan belt" related. A "twinging" sound. I even checked the level on the power steering.
We just got back from another short jaunt. As we started the 190 mile trek home, I heard the noise and bothered to check power steering. Full.
The noise shut up and so we went on. About an hour later the fan clutch engaged. I checked the engine temp and it was absolutely normal. The clutch roared and then went to half speed and then got quite.
Maneuvering in yard comprehension came to me. The twining and twanging was constant. Fan clutch. When I shut it down it rattled on for about 10 seconds. A quick estimate says this one lasted about 2200 miles. I can't wait to lay on my belly board and change it.
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These things really are a crap shoot. The performance varies dramatically within a given part number and even if you finally find one that engages and disengages when you want, the lifespan is an issue. It's not just a China thing since I've had the same issue with US built units. We are dealing with aftermarket part numbers which have very minimal is any quality oversight. If we can find a current OEM production unit, we will have much better luck no matter where it is made. I personally wouldn't rule out an electronically modulated viscous clutch that is used on many current model trucks.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: Oh, Sure, Another Fan Clutch [message #246830 is a reply to message #246772] |
Tue, 08 April 2014 20:56 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Senior Member |
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That would so great if we could find a truck electric clutch application. Thermal sensor in the air stream after the radiator and a dash mounted override switch. The Peterbuilt type seem to be loose or locked. Need something with variable levels of engagement. Locked on with 425 in S would be a great long hill descent aide.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: [GMCnet] Oh, Sure, Another Fan Clutch [message #246890 is a reply to message #246813] |
Wed, 09 April 2014 11:03 |
Jim Bounds
Messages: 842
Registered: January 2004
Karma: 0
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Senior Member |
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A fan clutch is a "disposable" part not unlike plug wires, dist cap and rotor, etc. They do go out, the manufacturer says 2-3 years and it's a good idea to replace it.
Delco used to be what I used until I found that Delco stopped working with reman od starters, Alt., AC compressors and yes, fan clutches. Hayden builds about every name fan clutch out there. 2747 Hatden is the heavy duty that seems to work well in our coach. The 2797 is a severe duty clutch that sound like a B-52 taking off and the 2807 is a standard duty.
They do go bad, like he said bout everything is from China-- welcome to the world of cost effective parts sourcing, things will be different now...
Jim Bounds
________________________________
From: Bob de Kruyff <NEXT2POOL@AOL.COM>
To: gmclist@temp.gmcnet.org
Sent: Tuesday, April 8, 2014 8:12 PM
Subject: Re: [GMCnet] Oh, Sure, Another Fan Clutch
George Beckman wrote on Tue, 08 April 2014 10:30
> We went to Fort Bragg, CA, last month and I occasionally heard a noise that sounded "fan belt" related. A "twinging" sound. I even checked the level on the power steering.
>
> We just got back from another short jaunt. As we started the 190 mile trek home, I heard the noise and bothered to check power steering. Full.
>
> The noise shut up and so we went on. About an hour later the fan clutch engaged. I checked the engine temp and it was absolutely normal. The clutch roared and then went to half speed and then got quite.
>
> Maneuvering in yard comprehension came to me. The twining and twanging was constant. Fan clutch. When I shut it down it rattled on for about 10 seconds. A quick estimate says this one lasted about 2200 miles. I can't wait to lay on my belly board and change it.
These things really are a crap shoot. The performance varies dramatically within a given part number and even if you finally find one that engages and disengages when you want, the lifespan is an issue. It's not just a China thing since I've had the same issue with US built units. We are dealing with aftermarket part numbers which have very minimal is any quality oversight. If we can find a current OEM production unit, we will have much better luck no matter where it is made. I personally wouldn't rule out an electronically modulated viscous clutch that is used on many current model trucks.
--
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: Oh, Sure, Another Fan Clutch [message #246940 is a reply to message #246772] |
Wed, 09 April 2014 19:27 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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That's rediculous to think it a wear item like tires and brake pads. Does your oil filled transmission torque convertor wear out every 3 years? I blame poor quality as I never remember air cond GM cars and trucks having massive fan clutch failures in the last 40 years.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: [GMCnet] Oh, Sure, Another Fan Clutch [message #246945 is a reply to message #246940] |
Wed, 09 April 2014 19:46 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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I know that electric fans have been tried and discussed by many in this group. I remember that the majority opinion was that they were not a good idea. I cannot for the life of me remember why.
Todd Sullivan
Sully
77 royale
Seattle
> On Apr 9, 2014, at 5:27 PM, John R. Lebetski <gransport@aol.com> wrote:
>
>
>
> That's rediculous to think it a wear item like tires and brake pads. Does your oil filled transmission torque convertor wear out every 3 years? I blame poor quality as I never remember air cond GM cars and trucks having massive fan clutch failures in the last 40 years.
> --
> John Lebetski
> Chicago, IL
> 77 Eleganza II
> Source America First
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Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
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| Re: [GMCnet] Oh, Sure, Another Fan Clutch [message #246958 is a reply to message #246948] |
Wed, 09 April 2014 20:29 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Bob,
You're probably in a better position than any of us to answer the question,
what are the essential differences between the one you referenced at $185
and this one (with the same ad photo) for $119.99?
http://www.ebay.com/itm/2002-2006-Chevy-TrailBlazer-Cooling-Fan-Clutch-NEW/350585910183?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222005%26al go%3DSIC.PROD%26ao%3D1%26asc%3D20643%26meid%3D6094372319824636845%26pid%3D100005%26prg%3D9209%26rk%3D1%26rkt%3D6%26sd%3D301130255221&rt=nc
http://goo.gl/7HiAJq
Or the 3 others at the bottom of the page, for that matter.
The development of a manual or thermostatic pulse width controller would be
a trivial task for a number of people on the GMCNet if a few parameters
were known.
Wish we had a functional junk yard around here; I'd take the applications
list and go examine a few of them.
Ken H.
On Wed, Apr 9, 2014 at 7:59 PM, Bob de Kruyff wrote:
>
>
> I'm thinking of something like this. There are hundreds of different
> versions of these. Most are pulse width modulated by the engine computer,
> but I'm sure all of that can be figured out by some of our members.
>
>
> http://www.ebay.com/itm/Dorman-OE-Solutions-602-001-Electronic-Radiator-Fan-Clutch-GM-2002-2007-/301130255221?pt=Motors_Car_Truck_Parts_Accessories&am p;hash=item461cc30b75&vxp=mtr
> --
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Oh, Sure, Another Fan Clutch [message #246959 is a reply to message #246958] |
Wed, 09 April 2014 20:36 |
Bruce Hart
Messages: 1501
Registered: October 2011
Location: La Grange, Wyoming
Karma: 5
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Senior Member |
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Ken, biggest difference is different sellers.
On Wed, Apr 9, 2014 at 7:29 PM, Ken Henderson <hend4800@bellsouth.net>wrote:
> Bob,
>
> You're probably in a better position than any of us to answer the question,
> what are the essential differences between the one you referenced at $185
> and this one (with the same ad photo) for $119.99?
>
>
> http://www.ebay.com/itm/2002-2006-Chevy-TrailBlazer-Cooling-Fan-Clutch-NEW/350585910183?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222005%26al go%3DSIC.PROD%26ao%3D1%26asc%3D20643%26meid%3D6094372319824636845%26pid%3D100005%26prg%3D9209%26rk%3D1%26rkt%3D6%26sd%3D301130255221&rt=nc
>
> http://goo.gl/7HiAJq
>
> Or the 3 others at the bottom of the page, for that matter.
>
> The development of a manual or thermostatic pulse width controller would be
> a trivial task for a number of people on the GMCNet if a few parameters
> were known.
>
> Wish we had a functional junk yard around here; I'd take the applications
> list and go examine a few of them.
>
> Ken H.
>
>
> On Wed, Apr 9, 2014 at 7:59 PM, Bob de Kruyff wrote:
>
> >
> >
> > I'm thinking of something like this. There are hundreds of different
> > versions of these. Most are pulse width modulated by the engine computer,
> > but I'm sure all of that can be figured out by some of our members.
> >
> >
> >
> http://www.ebay.com/itm/Dorman-OE-Solutions-602-001-Electronic-Radiator-Fan-Clutch-GM-2002-2007-/301130255221?pt=Motors_Car_Truck_Parts_Accessories&am p;hash=item461cc30b75&vxp=mtr
> > --
> >
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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>
--
Bruce Hart
1976 Palm Beach
Milliken, Co
GMC=Got More Class
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Bruce Hart
1976 Palm Beach
1977 28' Kingsley
La Grange, Wyoming
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| Re: [GMCnet] Oh, Sure, Another Fan Clutch [message #246963 is a reply to message #246958] |
Wed, 09 April 2014 21:03 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Senior Member |
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I can't answer you Ken. I see similar if not identical parts even from the same seller at various prices. I think the main challenge for us will be to find one that has the correct physical mounting characteristics. I also see that many are designed for reverse rotation--whatever we may need (most of the applications probably use serpentine belts). If you google these, you can find manufacturer or distributer websites that have detailed specs. Frankly, you are probably the best qualified to try one of these !
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] Oh, Sure, Another Fan Clutch [message #246964 is a reply to message #246960] |
Wed, 09 April 2014 21:05 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Senior Member |
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| roy1 wrote on Wed, 09 April 2014 19:42 |
That is a possibility but the trailblazer has a serpentine belt so it would have a reverse rotation.
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Agreed--I just picked an example out of the blue--there are many designed for reverse rotation.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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