Home » Public Forums » GMCnet » [GMCnet] Cad500 Fan Clutch
| [GMCnet] Cad500 Fan Clutch [message #174864] |
Thu, 28 June 2012 07:44  |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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ATTN: Cad 500 nuts
My Cad controls its H2O temperature just fine. On the 900 mile trip last
week, mostly in 90+*F temperatures, it stayed between 198*F and 202*F at
least 99% of the time, with occasional excursions as low as 196*F or as
high as 203*F. BUT, the fan clutch stayed engaged about 50% of the time!
Which might indicate that I need more cooling capacity. But the
engagement seemed to have NO correlation with the temperature; in fact, it
almost seemed to be inversely correlated: At times the clutch would engage
with the temperature at 198*F and disengage at 202*F! Thus, the problem is
NOT that the AL radiator is inadequate. Obviously, the engagement
temperature of the clutch is just too close to the engine's normal
operating temperature.
So, yesterday I decided to install one of the bargain standard 455 fan
clutches I bought when they were so cheap on eBay recently. Uh-oh! I
forgot -- the WP bolt pattern is different on the 500! Looks like Alan
gets a couple of free spares.
My question now is, "Who's REAL happy with their Cad500 fan clutch and what
is it?"
Ken H.
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Ken Henderson
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www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Cad500 Fan Clutch [message #174868 is a reply to message #174864] |
Thu, 28 June 2012 08:15  |
Larry
Messages: 2875
Registered: January 2004
Location: Menomonie, WI
Karma: 10
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| Ken Henderson wrote on Thu, 28 June 2012 07:44 |
ATTN: Cad 500 nuts
My question now is, "Who's REAL happy with their Cad500 fan clutch and what
is it?"
Ken H.
|
Ken,
Mine is a Delco unit that I bought online from the Delco site about 8 yrs ago. It works perfect. Temp goes to 210 or so, fan comes on and drags temp down to 192 where it goes off. Sometime today I will look through my receipts and see if I can find what the part # is.
BTW, at Bob Drews suggestion, I built a "funnel" out of conveyer belt material that I bought at a farm supply store. (ah...NO...not JD) The funnel completely encloses the radiator from the radiator out to the grill not allowing air to escape around the sides, over the top, or out the bottom. Once air enters the grill, the air has nowhere to go accept through the radiator. The fan clutch use to engage a lot before the funnel. Now, even in very warm weather, the only time it engages is when I slow down for in-town driving. Engine temps run at 192 regardless of ambient temps, (until I slow down for town traffic).
Larry 
78 Royale w/500 Caddy
Menomonie, WI.
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| Re: [GMCnet] Cad500 Fan Clutch [message #174870 is a reply to message #174864] |
Thu, 28 June 2012 08:14 |
Steven Ferguson
Messages: 3447
Registered: May 2006
Karma: 0
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Senior Member |
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Ken,
As you know, I spent a lot of time and $$ looking into fan clutches. I
did learn a lot but came to no real bottom line. First of all, buying a
fan clutch is a real crap shoot. You used to be able to trust genuine GM
AC Delco parts, this is no longer the case. Delphi has become a packaging
company, and my research turned up the fact that Hayden now makes some of
the HD fan clutches for Delco, and even Hayden farms out some of it's
manufacturing to offshore companies.
Driven by necessity, I think Armand Minnie has found the best workable
solution for those who detest heaing (and feeling) that massive fan
constantly engaging ad disengaging.
Radiator baffles: If you haven't got 'em get 'em and install 'em.
Front air dam: Get one, it's the final piece of the puzzle.
Fan Clutch: Keep trying.
On Thu, Jun 28, 2012 at 5:44 AM, Ken Henderson <hend4800@bellsouth.net>wrote:
> ATTN: Cad 500 nuts
>
> My Cad controls its H2O temperature just fine. On the 900 mile trip last
> week, mostly in 90+*F temperatures, it stayed between 198*F and 202*F at
> least 99% of the time, with occasional excursions as low as 196*F or as
> high as 203*F. BUT, the fan clutch stayed engaged about 50% of the time!
> Which might indicate that I need more cooling capacity. But the
> engagement seemed to have NO correlation with the temperature; in fact, it
> almost seemed to be inversely correlated: At times the clutch would engage
> with the temperature at 198*F and disengage at 202*F! Thus, the problem is
> NOT that the AL radiator is inadequate. Obviously, the engagement
> temperature of the clutch is just too close to the engine's normal
> operating temperature.
>
> So, yesterday I decided to install one of the bargain standard 455 fan
> clutches I bought when they were so cheap on eBay recently. Uh-oh! I
> forgot -- the WP bolt pattern is different on the 500! Looks like Alan
> gets a couple of free spares.
>
> My question now is, "Who's REAL happy with their Cad500 fan clutch and what
> is it?"
>
> Ken H.
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Fathom the hypocrisy of a nation where every citizen must prove they have
health insurance......but not everyone has to prove they're a citizen.
Steve Ferguson
Sierra Vista, AZ
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| Re: [GMCnet] Cad500 Fan Clutch [message #174877 is a reply to message #174870] |
Thu, 28 June 2012 08:54 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Thanks, Steve,
I've had side baffles for years. And I added the lower radiator scoop a
couple of years ago:
http://www.gmcmhphotos.com/photos/g5632-under-bumper-air-scoop-amp-rock-guard.html
What I don't have is a top baffle from the grille to the top of the
radiator, something only a few seem to have done (Barry Owen of NC, NASCAR
mechanic & aerodynamics specialist installed a complete aluminum duct on
his GMC). Before I replace this fan clutch, which works very well except
for its propensity to come on a little too soon, I may add that top baffle.
With a little more air flow, the clutch may calm down.
Which makes me think of something else I need to try: I'd better tape shut
the dampers I added in this, as yet un-proven, project:
http://www.gmcmhphotos.com/photos/g5567-radiator-shroud-modification.html
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI+ & EBL
www.gmcwipersetc.com
On Thu, Jun 28, 2012 at 9:14 AM, Steven Ferguson wrote:
> Ken,
> As you know, I spent a lot of time and $$ looking into fan clutches. I
> did learn a lot but came to no real bottom line. First of all, buying a
> fan clutch is a real crap shoot. You used to be able to trust genuine GM
> AC Delco parts, this is no longer the case. Delphi has become a packaging
> company, and my research turned up the fact that Hayden now makes some of
> the HD fan clutches for Delco, and even Hayden farms out some of it's
> manufacturing to offshore companies.
> Driven by necessity, I think Armand Minnie has found the best workable
> solution for those who detest heaing (and feeling) that massive fan
> constantly engaging ad disengaging.
> Radiator baffles: If you haven't got 'em get 'em and install 'em.
> Front air dam: Get one, it's the final piece of the puzzle.
> Fan Clutch: Keep trying.
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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] Cad500 Fan Clutch [message #174879 is a reply to message #174864] |
Thu, 28 June 2012 09:14 |
shawnee
Messages: 422
Registered: February 2004
Location: NC
Karma: 0
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Senior Member |
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| Ken Henderson wrote on Thu, 28 June 2012 08:44 |
ATTN: Cad 500 nuts
My Cad controls its H2O temperature just fine. On the 900 mile trip last
week, mostly in 90+*F temperatures, it stayed between 198*F and 202*F at
least 99% of the time, with occasional excursions as low as 196*F or as
high as 203*F. BUT, the fan clutch stayed engaged about 50% of the time!
Which might indicate that I need more cooling capacity. But the
engagement seemed to have NO correlation with the temperature; in fact, it
almost seemed to be inversely correlated: At times the clutch would engage
with the temperature at 198*F and disengage at 202*F! Thus, the problem is
NOT that the AL radiator is inadequate. Obviously, the engagement
temperature of the clutch is just too close to the engine's normal
operating temperature.
So, yesterday I decided to install one of the bargain standard 455 fan
clutches I bought when they were so cheap on eBay recently. Uh-oh! I
forgot -- the WP bolt pattern is different on the 500! Looks like Alan
gets a couple of free spares.
My question now is, "Who's REAL happy with their Cad500 fan clutch and what
is it?"
Ken H.
|
Ken,
Somewhere in my memory (which is not too good) I remember the Cad engine was designed to run hotter than the 455. I think it was about 205 degrees. Since the fan clutch is designed to come on at about 170 degrees air temperature through the radiator, this might affect the clutch operation. May be fan clutch that comes on at higher temperature would work better for you. My clutch with the 455 rarely comes on except going up a long grade. The engine temp usually runs between 190 to 195 degrees otherwise. In the back of my mind I think the temperature for the clutch to come was changed for some newer clutches.
Gene Dotson
74 Canyonlands
www.bdub.net/Motorhome_Enhancements New Windows and Aluminum Radiators
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| Re: [GMCnet] Cad500 Fan Clutch [message #174883 is a reply to message #174879] |
Thu, 28 June 2012 09:26 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Gene,
You're right about the 500 running hotter. If you compare the water
passages out of the 455 and 500 pumps, the 500's are significantly smaller
-- an early clue that it's likely to run warmer.
And I'm sure you're right about needing the higher temp clutch -- but how
to find one???
Until I can determine what's a higher temperature clutch, I think I'll try
getting more air through the radiator with a top baffle.
Ken H.
On Thu, Jun 28, 2012 at 10:14 AM, Gene Dotson wrote:
> Somewhere in my memory (which is not too good) I remember the Cad engine
> was designed to run hotter than the 455. I think it was about 205 degrees.
> Since the fan clutch is designed to come on at about 170 degrees air
> temperature through the radiator, this might affect the clutch operation.
> May be fan clutch that comes on at higher temperature would work better
> for you. My clutch with the 455 rarely comes on except going up a long
> grade. The engine temp usually runs between 190 to 195 degrees otherwise.
> In the back of my mind I think the temperature for the clutch to come was
> changed for some newer clutches.
>
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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] Cad500 Fan Clutch [message #174886 is a reply to message #174864] |
Thu, 28 June 2012 09:50 |
Ray Erspamer
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
Karma: -3
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Senior Member |
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This is an interesting topic.....
Ken, what equivalent fan clutch are you running?
On our 403 I run the medium duty clutch, Auto Zone 21-5046 or Hayden 2747. I
do not like the severe duty 15-4644 at all, continually engages to the max then
disengages, thing ROARS, I can't keep the belts from squealing when it engages,
thing dives me nuts. I've found that the medium duty works great for our
climate, not sure how it would do in the south.
Radiator is new as of Sept 2010,
Ray
Ray & Lisa
78 Royale "Great Lakes Eagle"
Center Kitchen TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMC-Royale@att.net
414-745-3188
Web Site: http://ray-lisa.page.tl/
________________________________
From: Ken Henderson <hend4800@bellsouth.net>
To: gmclist <gmclist@temp.gmcnet.org>
Sent: Thu, June 28, 2012 7:45:49 AM
Subject: [GMCnet] Cad500 Fan Clutch
ATTN: Cad 500 nuts
My Cad controls its H2O temperature just fine. On the 900 mile trip last
week, mostly in 90+*F temperatures, it stayed between 198*F and 202*F at
least 99% of the time, with occasional excursions as low as 196*F or as
high as 203*F. BUT, the fan clutch stayed engaged about 50% of the time!
Which might indicate that I need more cooling capacity. But the
engagement seemed to have NO correlation with the temperature; in fact, it
almost seemed to be inversely correlated: At times the clutch would engage
with the temperature at 198*F and disengage at 202*F! Thus, the problem is
NOT that the AL radiator is inadequate. Obviously, the engagement
temperature of the clutch is just too close to the engine's normal
operating temperature.
So, yesterday I decided to install one of the bargain standard 455 fan
clutches I bought when they were so cheap on eBay recently. Uh-oh! I
forgot -- the WP bolt pattern is different on the 500! Looks like Alan
gets a couple of free spares.
My question now is, "Who's REAL happy with their Cad500 fan clutch and what
is it?"
Ken H.
_______________________________________________
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Unsubscribe or Change List Options:
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Ray Erspamer
78 GMC Royale Center Kitchen
403, 3.70 Final Drive
Holley Sniper Quadrajet EFI System,
Holley Hyperspark Ignition System
414-484-9431
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| Re: [GMCnet] Cad500 Fan Clutch [message #174887 is a reply to message #174870] |
Thu, 28 June 2012 09:51 |
Ray Erspamer
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
Karma: -3
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Senior Member |
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radiator baffles: If you haven't got 'em get 'em and install 'em.
Front air dam: Get one, it's the final piece of the puzzle.
Where can I find details on this ???
Ray
Ray & Lisa
78 Royale "Great Lakes Eagle"
Center Kitchen TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMC-Royale@att.net
414-745-3188
Web Site: http://ray-lisa.page.tl/
________________________________
From: Steven Ferguson <botiemad11@gmail.com>
To: gmclist@temp.gmcnet.org
Sent: Thu, June 28, 2012 8:15:03 AM
Subject: Re: [GMCnet] Cad500 Fan Clutch
Ken,
As you know, I spent a lot of time and $$ looking into fan clutches. I
did learn a lot but came to no real bottom line. First of all, buying a
fan clutch is a real crap shoot. You used to be able to trust genuine GM
AC Delco parts, this is no longer the case. Delphi has become a packaging
company, and my research turned up the fact that Hayden now makes some of
the HD fan clutches for Delco, and even Hayden farms out some of it's
manufacturing to offshore companies.
Driven by necessity, I think Armand Minnie has found the best workable
solution for those who detest heaing (and feeling) that massive fan
constantly engaging ad disengaging.
Radiator baffles: If you haven't got 'em get 'em and install 'em.
Front air dam: Get one, it's the final piece of the puzzle.
Fan Clutch: Keep trying.
On Thu, Jun 28, 2012 at 5:44 AM, Ken Henderson <hend4800@bellsouth.net>wrote:
> ATTN: Cad 500 nuts
>
> My Cad controls its H2O temperature just fine. On the 900 mile trip last
> week, mostly in 90+*F temperatures, it stayed between 198*F and 202*F at
> least 99% of the time, with occasional excursions as low as 196*F or as
> high as 203*F. BUT, the fan clutch stayed engaged about 50% of the time!
> Which might indicate that I need more cooling capacity. But the
> engagement seemed to have NO correlation with the temperature; in fact, it
> almost seemed to be inversely correlated: At times the clutch would engage
> with the temperature at 198*F and disengage at 202*F! Thus, the problem is
> NOT that the AL radiator is inadequate. Obviously, the engagement
> temperature of the clutch is just too close to the engine's normal
> operating temperature.
>
> So, yesterday I decided to install one of the bargain standard 455 fan
> clutches I bought when they were so cheap on eBay recently. Uh-oh! I
> forgot -- the WP bolt pattern is different on the 500! Looks like Alan
> gets a couple of free spares.
>
> My question now is, "Who's REAL happy with their Cad500 fan clutch and what
> is it?"
>
> Ken H.
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Fathom the hypocrisy of a nation where every citizen must prove they have
health insurance......but not everyone has to prove they're a citizen.
Steve Ferguson
Sierra Vista, AZ
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
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Ray Erspamer
78 GMC Royale Center Kitchen
403, 3.70 Final Drive
Holley Sniper Quadrajet EFI System,
Holley Hyperspark Ignition System
414-484-9431
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| Re: [GMCnet] Cad500 Fan Clutch [message #174892 is a reply to message #174864] |
Thu, 28 June 2012 10:32 |
LYNN L
Messages: 140
Registered: March 2005
Location: Pearland TX.
Karma: 0
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Senior Member |
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Ken, I aspire to the philosiphy of the KISS principle. Why use a fan clutch at all? The flexible fan does a fine job of keeping my Cadillac motor at 190 degrees all the time. On trips when the outside air temp. goes above 105 and I am stuck in traffic idling a lot, the manually operated auxillary fan in front of the radiator keeps the temp. at normal levels and no air funnels are requires. The gas mileage is still between 8 to 9 MPG.
Lynn L
76 Eleganza Cad.500
Pearland TX.
[Updated on: Thu, 28 June 2012 10:34] Report message to a moderator |
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| Re: [GMCnet] Cad500 Fan Clutch [message #174895 is a reply to message #174892] |
Thu, 28 June 2012 10:48 |
Ray Erspamer
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
Karma: -3
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What is the FLEXIBLE FAN ???
Ray
Ray & Lisa
78 Royale "Great Lakes Eagle"
Center Kitchen TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMC-Royale@att.net
414-745-3188
Web Site: http://ray-lisa.page.tl/
________________________________
From: LYNN LAYCOCK <lynn_sr@msn.com>
To: gmclist@temp.gmcnet.org
Sent: Thu, June 28, 2012 10:33:56 AM
Subject: Re: [GMCnet] Cad500 Fan Clutch
Ken, I aspire to the philosiphy of the KISS principle. Why use a fan clutch? The
flexible fan does a fine job of keeping my Cadillac moter at 190 degrees all
the time. On trips when the outside air temp. goes above 105 and I am stuck in
traffic idling a lot, the manually operated auxillary fan in front of the
radiator keeps the temp. at normal levels and there are no air funnels. The gas
mileage is still between 8 to 9 MPG.
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Ray Erspamer
78 GMC Royale Center Kitchen
403, 3.70 Final Drive
Holley Sniper Quadrajet EFI System,
Holley Hyperspark Ignition System
414-484-9431
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| Re: [GMCnet] Cad500 Fan Clutch [message #174896 is a reply to message #174864] |
Thu, 28 June 2012 10:52 |
Ray Erspamer
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
Karma: -3
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Senior Member |
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I STILL like the idea of an electric fan, but I know this has been beat to death
and not very successful.
Have there been any new developments with it ??
Ray
Ray & Lisa
78 Royale "Great Lakes Eagle"
Center Kitchen TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMC-Royale@att.net
414-745-3188
Web Site: http://ray-lisa.page.tl/
________________________________
From: Ken Henderson <hend4800@bellsouth.net>
To: gmclist <gmclist@temp.gmcnet.org>
Sent: Thu, June 28, 2012 7:44:56 AM
Subject: [GMCnet] Cad500 Fan Clutch
ATTN: Cad 500 nuts
My Cad controls its H2O temperature just fine. On the 900 mile trip last
week, mostly in 90+*F temperatures, it stayed between 198*F and 202*F at
least 99% of the time, with occasional excursions as low as 196*F or as
high as 203*F. BUT, the fan clutch stayed engaged about 50% of the time!
Which might indicate that I need more cooling capacity. But the
engagement seemed to have NO correlation with the temperature; in fact, it
almost seemed to be inversely correlated: At times the clutch would engage
with the temperature at 198*F and disengage at 202*F! Thus, the problem is
NOT that the AL radiator is inadequate. Obviously, the engagement
temperature of the clutch is just too close to the engine's normal
operating temperature.
So, yesterday I decided to install one of the bargain standard 455 fan
clutches I bought when they were so cheap on eBay recently. Uh-oh! I
forgot -- the WP bolt pattern is different on the 500! Looks like Alan
gets a couple of free spares.
My question now is, "Who's REAL happy with their Cad500 fan clutch and what
is it?"
Ken H.
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
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Unsubscribe or Change List Options:
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Ray Erspamer
78 GMC Royale Center Kitchen
403, 3.70 Final Drive
Holley Sniper Quadrajet EFI System,
Holley Hyperspark Ignition System
414-484-9431
|
|
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| Re: [GMCnet] Cad500 Fan Clutch [message #174898 is a reply to message #174895] |
Thu, 28 June 2012 11:01 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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Senior Member |
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[quote title=Ray Erspamer wrote on Thu, 28 June 2012 08:48]What is the FLEXIBLE FAN ???
Ray
Ray & Lisa
78 Royale "Great Lakes Eagle"
Center Kitchen TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMC-Royale@att.net
414-745-3188
Web Site: http://ray-lisa.page.tl/
Flex fans were very popular before clutch fans became widely used. The blades flex flatter at higher RPM.
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: [GMCnet] Cad500 Fan Clutch [message #174912 is a reply to message #174883] |
Thu, 28 June 2012 12:03 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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| Ken Henderson wrote on Thu, 28 June 2012 09:26 |
Gene,
You're right about the 500 running hotter. If you compare the water
passages out of the 455 and 500 pumps, the 500's are significantly smaller
-- an early clue that it's likely to run warmer.
And I'm sure you're right about needing the higher temp clutch -- but how
to find one???
Until I can determine what's a higher temperature clutch, I think I'll try
getting more air through the radiator with a top baffle.
Ken H.
|
Years ago when I went through 4 Hayden clutches for exactly the same problem. After a lot of discussion with Hayden I found an engineer who admitted that they lowered the cut in temperature on their clutches. He was quite proud of that and in fact bragged that is why their's were better. The engineer tried to get me to modify the spring mounting tab on the front of the clutch to make it cut in later.
I returned the Hayden clutches and went with AC Delco instead. Problem solved. The most recent clutch I bought had "Made in USA right" on the box. They use to be made in Indianapolis. I'm not sure that is where they make them today. I do not feel where they are made has much to do with it. It is more of a design issue.
I have no knowledge brands other than Hayden and AC Delco.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Cad500 Fan Clutch [message #174914 is a reply to message #174912] |
Thu, 28 June 2012 12:39 |
Ray Erspamer
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
Karma: -3
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Senior Member |
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What number Delco do you run Ken ???
Ray
Ray & Lisa
78 Royale "Great Lakes Eagle"
Center Kitchen TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMC-Royale@att.net
414-745-3188
Web Site: http://ray-lisa.page.tl/
________________________________
From: Ken Burton <n9cv@comcast.net>
To: gmclist@temp.gmcnet.org
Sent: Thu, June 28, 2012 12:03:43 PM
Subject: Re: [GMCnet] Cad500 Fan Clutch
Ken Henderson wrote on Thu, 28 June 2012 09:26
> Gene,
>
> You're right about the 500 running hotter. If you compare the water
> passages out of the 455 and 500 pumps, the 500's are significantly smaller
> -- an early clue that it's likely to run warmer.
>
> And I'm sure you're right about needing the higher temp clutch -- but how
> to find one???
>
> Until I can determine what's a higher temperature clutch, I think I'll try
> getting more air through the radiator with a top baffle.
>
> Ken H.
Years ago when I went through 4 Hayden clutches for exactly the same problem.
After a lot of discussion with Hayden I found an engineer who admitted that they
lowered the cut in temperature on their clutches. He was quite proud of that
and in fact bragged that is why their's were better. The engineer tried to get
me to modify the spring mounting tab on the front of the clutch to make it cut
in later.
I returned the Hayden clutches and went with AC Delco instead. Problem solved.
The most recent clutch I bought had "Made in USA right" on the box. They use to
be made in Indianapolis. I'm not sure that is where they make them today. I do
not feel where they are made has much to do with it. It is more of a design
issue.
I have no knowledge brands other than Hayden and AC Delco.
--
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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Ray Erspamer
78 GMC Royale Center Kitchen
403, 3.70 Final Drive
Holley Sniper Quadrajet EFI System,
Holley Hyperspark Ignition System
414-484-9431
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| Re: [GMCnet] Cad500 Fan Clutch [message #174948 is a reply to message #174864] |
Thu, 28 June 2012 19:59 |
kingd
Messages: 592
Registered: June 2004
Karma: 2
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Senior Member |
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Re fan clutches and electric fans. For a project for those that want visual information regarding Electric Fans, go to your neighourhood GMC/Chevy dealer and look under the hood of a full size Suburban or Yukon.( or maybe a full size Chevy or GMC pick up truck) Yes I know the gas engines are smaller than a 455 big block, but check out what the MAX Gross Combined Weight Rating is. (truck plus trailer) Then look for the fan on the front of the water pump. Missing in action. Two big electric fans mount to the backside(engine) side of the rad. I understand this also makes the A/C work better in stop and go/low speed traffic as at least 1 fan runs if the A/C is on and moves air over the condenser. Just What I Think I Know.
Unfortuneatly my GMC is NOT a Motorhome (LOL)
DAVE KING
DAVE KING
lurker, wannabe
Toronto, Ontario, Canada
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| Re: [GMCnet] Cad500 Fan Clutch [message #174989 is a reply to message #174914] |
Fri, 29 June 2012 01:45 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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I use the 15-4208. That is the one recommended by Delco for our coach. Unfortunately that one is superseded by another number. I'll have to see if I can find it. I believe the replacement is 15-4216
Someone had a bunch of new 15-4208's for sale on Ebay a few months back. Here are 2 of them for $40.00 including shipping.
http://www.ebay.com/itm/One-New-Fan-Clutch-ACDelco-15-4208-w-Bolts-Instructions-Made-in-USA-/400301188698?pt=Motors_Car_Truck_Parts_Accessories&ha sh=item5d33cf665a&vxp=mtr
Item number 400301188698
Ken B.
| Ray Erspamer wrote on Thu, 28 June 2012 12:39 |
What number Delco do you run Ken ???
Ray
Ray & Lisa
78 Royale "Great Lakes Eagle"
Center Kitchen TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMC-Royale@att.net
414-745-3188
Web Site: http://ray-lisa.page.tl/
________________________________
From: Ken Burton <n9cv@comcast.net>
To: gmclist@temp.gmcnet.org
Sent: Thu, June 28, 2012 12:03:43 PM
Subject: Re: [GMCnet] Cad500 Fan Clutch
Ken Henderson wrote on Thu, 28 June 2012 09:26
> Gene,
>
> You're right about the 500 running hotter. If you compare the water
> passages out of the 455 and 500 pumps, the 500's are significantly smaller
> -- an early clue that it's likely to run warmer.
>
> And I'm sure you're right about needing the higher temp clutch -- but how
> to find one???
>
> Until I can determine what's a higher temperature clutch, I think I'll try
> getting more air through the radiator with a top baffle.
>
> Ken H.
Years ago when I went through 4 Hayden clutches for exactly the same problem.
After a lot of discussion with Hayden I found an engineer who admitted that they
lowered the cut in temperature on their clutches. He was quite proud of that
and in fact bragged that is why their's were better. The engineer tried to get
me to modify the spring mounting tab on the front of the clutch to make it cut
in later.
I returned the Hayden clutches and went with AC Delco instead. Problem solved.
The most recent clutch I bought had "Made in USA right" on the box. They use to
be made in Indianapolis. I'm not sure that is where they make them today. I do
not feel where they are made has much to do with it. It is more of a design
issue.
I have no knowledge brands other than Hayden and AC Delco.
--
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
|
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Cad500 Fan Clutch [message #174997 is a reply to message #174989] |
Fri, 29 June 2012 06:16 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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I bought a couple of those from your posting. Yesterday I tried to install
one of the on the Cad, only to find that it had the wrong bolt pattern for
the water pump. Fortunately, I have a free Cad WP hub, so I used it as a
pattern, with a 9/16" drill bit to align the center hub holes, and made me
4 new holes.
While I've only driven around a big block with it installed, that clutch is
not staying engaged. We'll learn today, in the forecast 101*F temperature
whether it's an improvement. If it seems OK, I'll carry the other one,
also re-drilled as a spare -- one of very few in the coach.
Ken H.
On Fri, Jun 29, 2012 at 2:45 AM, Ken Burton wrote:
> I use the 15-4208. That is the one recommended by Delco for our coach.
> Unfortunately that one is superseded by another number. I'll have to see
> if I can find it. I believe the replacement is 15-4216
>
> Someone had a bunch of new 15-4208's for sale on Ebay a few months back.
> Here are 2 of them for $40.00 including shipping.
>
>
> http://www.ebay.com/itm/One-New-Fan-Clutch-ACDelco-15-4208-w-Bolts-Instructions-Made-in-USA-/400301188698?pt=Motors_Car_Truck_Parts_Accessories&ha sh=item5d33cf665a&vxp=mtr
>
> Item number 400301188698
>
>
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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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