| [GMCnet] NOT the Autozone 92-2797 Fan Clutch... [message #97051] |
Tue, 24 August 2010 18:41  |
KRDietz
Messages: 133
Registered: July 2010
Karma: 0
|
Senior Member |
|
|
Took a short trip this weekend. 200+ miles along the Oregon Coast.
The first 60 were from Eugene to Florence. The newly installed fan
clutch just about ruined that 60 miles trip.
My engine tends to run about 190-195 when cruising. Outside temp
doesn't seem to matter much. 70° to 90° - the engine runs about 190°
The new fan clutch would come on at 190° and push the temp back down to
180° before cycling off. 7-8 minutes later the engine would be at 190°
again and the fan would be howling away. And not just the fan, either.
I replaced the Alternator and PS pump belts because I thought they were
worn out. Nope. I think this fan clutch simply hooks up so solid that
even new belts (and yes, they were nice and tight) couldn't keep it from
squealing. It wasn't as bad as with the old belts but still very annoying.
So we're going to see what Autozone says when I take this fan clutch
back. I'll settle for store credit! I had the old fan clutch with me
and installed it in Florence. I think it's actually working just fine.
Saw 200° during the trip and heard the fan clutch come on about then.
It wasn't nearly as loud as the Autozone-driven fan was, however.
So anyway... more of the same when it comes to fan clutches...
Kelvin
'73 23' in Eugene, OR
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
|
|
|
|
|
|
| Re: [GMCnet] NOT the Autozone 92-2797 Fan Clutch... [message #97077 is a reply to message #97051] |
Tue, 24 August 2010 20:02  |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
|
Senior Member |
|
|
| KRDietz wrote on Tue, 24 August 2010 19:41 |
Took a short trip this weekend. 200+ miles along the Oregon Coast.
The first 60 were from Eugene to Florence. The newly installed fan
clutch just about ruined that 60 miles trip.
My engine tends to run about 190-195 when cruising. Outside temp
doesn't seem to matter much. 70° to 90° - the engine runs about 190°
The new fan clutch would come on at 190° and push the temp back down to
180° before cycling off. 7-8 minutes later the engine would be at 190°
again and the fan would be howling away. And not just the fan, either.
I replaced the Alternator and PS pump belts because I thought they were
worn out. Nope. I think this fan clutch simply hooks up so solid that
even new belts (and yes, they were nice and tight) couldn't keep it from
squealing. It wasn't as bad as with the old belts but still very annoying.
So we're going to see what Autozone says when I take this fan clutch
back. I'll settle for store credit! I had the old fan clutch with me
and installed it in Florence. I think it's actually working just fine.
Saw 200° during the trip and heard the fan clutch come on about then.
It wasn't nearly as loud as the Autozone-driven fan was, however.
So anyway... more of the same when it comes to fan clutches...
Kelvin
'73 23' in Eugene, OR
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
swap it for the 92-2747 and get $10 back.
C. Boyd
76 Crestmont
East Tennessee
|
|
|
|
| Re: [GMCnet] NOT the Autozone 92-2797 Fan Clutch... [message #97085 is a reply to message #97072] |
Tue, 24 August 2010 20:11 |
 |
USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
|
Senior Member |
|
|
Dan,
It seems to me that if your engine does not overheat the fan clutch has to
be engaging.
Steve,
Is it possible that some fan clutches "spool up" (engage) slower and gentler
than others?
Regards,
Rob M.
USAussie
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Dan Gregg
Sent: Tuesday, August 24, 2010 8:35 PM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] NOT the Autozone 92-2797 Fan Clutch...
I am sure the one I have just free rolls. I have never heard it. I dont over
heat so I am not worried about it, yet. But one of these days. That is why I
am interested in some way to run electric fans without being such a drag on
the electricals.
Dan
--
Dan & Teri Gregg
http://danandteri.blogspot.com/
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
|
|
|
|
|
|
| Re: [GMCnet] NOT the Autozone 92-2797 Fan Clutch... [message #97093 is a reply to message #97090] |
Tue, 24 August 2010 20:47 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
|
Senior Member |
|
|
""Yeah... that was certainly one thought.
No way I'm buying another 2797...
""
Kelvin, I don't have a good suggestion for any one on this clutch issue but remember I had a 2797 that didn't engage at all and another that seems to be perfect. With this kind of variability I don't think any of us can make a decision other than most of us are fed up and disgusted by it.
Bob de Kruyff
78 Eleganza
Chandler, AZ
|
|
|
|
| Re: [GMCnet] NOT the Autozone 92-2797 Fan Clutch... [message #97100 is a reply to message #97090] |
Tue, 24 August 2010 21:11 |
shawnee
Messages: 422
Registered: February 2004
Location: NC
Karma: 0
|
Senior Member |
|
|
| KRDietz wrote on Tue, 24 August 2010 21:33 |
>> So we're going to see what Autozone says when I take this fan clutch
>> back. I'll settle for store credit! I had the old fan clutch with me
>> and installed it in Florence. I think it's actually working just fine.
>> Saw 200° during the trip and heard the fan clutch come on about then.
>> It wasn't nearly as loud as the Autozone-driven fan was, however.
>>
>> So anyway... more of the same when it comes to fan clutches...
>>
>> Kelvin
>> '73 23' in Eugene, OR
> swap it for the 92-2747 and get $10 back.
Yeah... that was certainly one thought.
No way I'm buying another 2797...
Kelvin
_______________________________________________
|
Kelvin,
My experience with the Hayden 2797 was the same as Bob DeKruff. The first one I bought never came on. I took it back and the second one worked fine. Bob had the same experience. It is made in the USA but I think they still have quality problems. They are under warranty so they should give you a new one to replace the one that didn't work. I didn't have any problem when I returned it. They just went back and got another one. It made me suspect the problem happens too much when I was not asked any questions.
Gene Dotson
74 Canyonlands
www.bdub.net/Motorhome_Enhancements New Windows and Aluminum Radiators
|
|
|
|
|
|
| Re: [GMCnet] NOT the Autozone 92-2797 Fan Clutch [message #97108 is a reply to message #97051] |
Tue, 24 August 2010 23:15 |
kenneth hugelier
Messages: 89
Registered: August 2008
Karma: 0
|
Member |
|
|
I have no answers, just information. When I discovered that my fan clutch was no longer working, I called Jim K and ordered one. When I removed the old one, it was obvious that it was a cheap after market replacement. I don't know what the part number is of the one I got from Jim, but it works like this: the engine temp. does not change appreciably. I have a digi-panel or whatever it's called and I am sure the engine temp can vary a few degrees before the little LED on the panel changes position. When going up a hill in normal warm summer weather, I can hear the fan start to spool up. The amount of engagement of the fan depends on the length and grade of the hill, but the temp does not move. If the hill is long enough or steep enough, the fan will go full tilt for a bit then slow down. I have had to turn down the radio to tell if and when the fan is engaging. I have not been out in extreme heat, that is above 90F or so, but plenty in the upper eighties.
I like the way it works. I am not complaining. Like I said, no answers, just my experience with fan clutches
Oh, I have a 455 with headers and fender vents on the sides. The stock radiator was cleaned and refurbished by a former PO when the engine was replaced a little over 20K ago.
ken hugelier 77 PB Det. Mich.
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
| Re: [GMCnet] NOT the Autozone 92-2797 Fan Clutch... [message #97133 is a reply to message #97085] |
Wed, 25 August 2010 08:40 |
Steven Ferguson
Messages: 3447
Registered: May 2006
Karma: 0
|
Senior Member |
|
|
Rob,
In all of the ones I tested, there wasn't any appreciable difference
in spool up time to total engagement. Nor was there any measurable
difference in the time it took to totally disengage. The Haydens and
the AC Delco 15-4949 spun at a much lower percentage of engine rpm
when disengaged.
If you are not overheating, other than the normal rise in temps
when under heavy load or surge temps at the end of off ramps, and you
are not hearing the fan engage, you have the fan clutch I would want.
More and more I led to believe that GM had a good reason for leaving
a large portion of the "hot" side of the radiator unshrouded. That
is where the hottest air is coming through the radiator.
We need to listen to K.H. after he gets an opportunity to test his
modified shroud. I bet the call to the Curtis's will be going out
shortly thereafter for them to make a shroud that uncovers the "hot"
side of the radiator.
On Tue, Aug 24, 2010 at 6:11 PM, Rob Mueller <robmueller@iinet.net.au> wrote:
> Dan,
>
> It seems to me that if your engine does not overheat the fan clutch has to
> be engaging.
>
> Steve,
>
> Is it possible that some fan clutches "spool up" (engage) slower and gentler
> than others?
>
> Regards,
> Rob M.
> USAussie
>
> -----Original Message-----
> From: gmclist-bounces@temp.gmcnet.org
> [mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Dan Gregg
> Sent: Tuesday, August 24, 2010 8:35 PM
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] NOT the Autozone 92-2797 Fan Clutch...
>
> I am sure the one I have just free rolls. I have never heard it. I dont over
> heat so I am not worried about it, yet. But one of these days. That is why I
> am interested in some way to run electric fans without being such a drag on
> the electricals.
> Dan
> --
> Dan & Teri Gregg
>
> http://danandteri.blogspot.com/
>
>
>
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Steve Ferguson
'76 EII
Sierra Vista, AZ
Urethane bushing source
www.bdub.net/ferguson/
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
| Re: [GMCnet] NOT the Autozone 92-2797 Fan Clutch... [message #97134 is a reply to message #97133] |
Wed, 25 August 2010 09:06 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
|
Senior Member |
|
|
I thought that was going to start yesterday. Until I pressed the brake
pedal and it was hard as a rock. Booster quit. New one's on the way.
Probably be next week before I can start road testing.
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI+ & EBL
www.gmcwipersetc.com
On Wed, Aug 25, 2010 at 9:40 AM, Steven Ferguson <botiemad11@gmail.com>wrote:
> ... We need to listen to K.H. after he gets an opportunity to test his
> modified shroud. I bet the call to the Curtis's will be going out
> shortly thereafter for them to make a shroud that uncovers the "hot"
> side of the radiator.
>
>
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
|
|
|
|
| Re: [GMCnet] NOT the Autozone 92-2797 Fan Clutch... [message #97146 is a reply to message #97134] |
Wed, 25 August 2010 10:16 |
LarryInSanDiego
Messages: 336
Registered: September 2006
Karma: 0
|
Senior Member |
|
|
A couple of summers ago when I got my GMC going, it would get hot quick. At the time, I couldn't afford the good Delco clutch that Jim sells but I had a Lincoln MKVII or MK VIII electric fan laying around for my race car project. It has an excellent reputation for being a huge air mover among road racers.
I removed the fan shrouding and stock fan, fabbed a fan box out of plywood and bolted the Lincoln fan onto that. It never goes past the 1/4 mark. Works so well I just left it on.
Larry Engelbrecht
San Diego, CA
'73 26' ex-Glacier
TZE063V100319 03/07/73
[Updated on: Wed, 25 August 2010 10:18] Report message to a moderator |
|
|
|
| Re: [GMCnet] NOT the Autozone 92-2797 Fan Clutch... [message #97191 is a reply to message #97133] |
Wed, 25 August 2010 14:49 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
|
Senior Member |
|
|
""Rob,
In all of the ones I tested, there wasn't any appreciable difference
in spool up time to total engagement. Nor was there any measurable
difference in the time it took to totally disengage. The Haydens and
the AC Delco 15-4949 spun at a much lower percentage of engine rpm
when disengaged.
""
I just requested that purchasing let me know when the Hayden rep comes in so I can talk to him. I discovered that we no longer source with them for just the reasons we have outlined (that sure was a short marraige). Apparently we have moved to Compressor Works and are having good luck so far.
Bob de Kruyff
78 Eleganza
Chandler, AZ
|
|
|
|
|
|
|
|
| Re: [GMCnet] NOT the Autozone 92-2797 Fan Clutch... [message #97206 is a reply to message #97196] |
Wed, 25 August 2010 17:20 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
|
Senior Member |
|
|
| Ken Henderson wrote on Wed, 25 August 2010 14:51 |
Interesting that Compressor Works' web site says they make TorqFlo, the
brand Kelvin got from AutoZone that's so noisy (in the 2797 version).
Ken H.
On Wed, Aug 25, 2010 at 3:49 PM, Bob de Kruyff <NEXT2POOL@aol.com> wrote:
>
> ... Apparently we have moved to Compressor Works and are having good luck
> so far.
> --
>
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
It's the fan that makes it noisy, not the clutch. Now if the clutch is coming on at the wrong time, that's a different story. My current clutch is cycling the way I want it and yes, when it's engaged the fan is noisy.
Bob de Kruyff
78 Eleganza
Chandler, AZ
|
|
|
|
|
|
| Re: [GMCnet] NOT the Autozone 92-2797 Fan Clutch... [message #97216 is a reply to message #97212] |
Wed, 25 August 2010 18:46 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
|
Senior Member |
|
|
I'll blame the heat since it's kept me from doing much of anything lately.
I've been thinking about replacing the booster because I'm pretty sure it's
the original -- and I'm getting weak enough to need the sensitized pedal.
:-)
Since I have a big reservoir, I have the boost pump on a manual switch. But
I can barely hear it anyway.
I only made it out of the driveway and 50' down the street before I decided
the short trip I'd planned was not a good idea. Even during that short
distance, I learned that my pneumatic parking brake really is a blessing --
when I wanted brakes, I just flipped it on and let the air do the work. It
pulls the pedal down harder than I can unless I grab the steering wheel and
pull in addition to standing my 220# on it.
Ken H.
On Wed, Aug 25, 2010 at 7:19 PM, Mr.erf ERFisher <mr.erfisher@gmail.com>wrote:
> > I thought that was going to start yesterday. Until I pressed the brake
> > pedal and it was hard as a rock. Booster quit. New one's on the way.
> >
>
> can we blame all of these failures on alcohol in the gas or something ???
>
> I have never heard of so many:
> catastrophic battery failures
> so many booster failures
> thermo fans that don't work,
>
> must be the weather
>
> by the way, didn't your vacuum pump tell you your booster was bad by
> running
> all of the time?
>
>
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
