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[GMCnet] Fan clutch. [message #225148] Thu, 10 October 2013 21:26 Go to next message
Thomas Pryor is currently offline  Thomas Pryor   United States
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Registered: January 2011
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As I restore my 77 transmode into something that looks like a real coach I
keep waisting time investigating things I read on our Tribal Blog.

I Called Tech support at Hayden Auto parts and was informed that offer 3
levels of fans. The results of those discussions were as follows:

*Standard duty* - not recommended for our coaches.

*Heavy duty* - Recommended for our coaches in the form of part #2747.

*Severe Duty* -Are only recommended for applications with fans that have a
"pitch" of 2 1/2" or greater. (my Fan and others that I have measured have
a 2" pitch) What Performance issues are created when we use Hayden pt#
2797 (Severe duty)?

A GMC 2" pitch fan *cannot *"decouple" from a Severe duty Clutch.

A GMC 2" pitch fan will always be engaged and rob Horse Power / decrease
gas mileage when used with a severe duty fan Clutch

A GMC 2" pitch fan will create excessive noise, when used with a severe
duty fan clutch.

A GMC 2" pitch fan will probably NOT Lengthen the bearing life in the
Water pump when used with a Severe duty Fan clutch.

I Can't vouch for the Delco brand of fan clutches. Don't know if they have
the same performance criteria or curves of performance.

As a side Bar issue, I've also contacted a couple of aftermarket folks to
investigate Electric fan alternatives. I've also asked them to look at
lighter weight fans that "flatten out" at higher RPMs including "Tuned"
Viscous clutches for those fans.
I'll report out as information becomes available.

--
Regards,

Tom Pryor
4188 Limerick Dr
Lake Wales, Fl 33859
Cell 248 470 9186

Living on a waterfront is not a matter of life or death. Its more
important than that.
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Re: [GMCnet] Fan clutch. [message #225155 is a reply to message #225148] Thu, 10 October 2013 22:03 Go to previous messageGo to next message
WD0AFQ is currently offline  WD0AFQ   United States
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Tom, let me know what you find out about the electrics. So far, no one has figured out how to make one work properly without drawing too much power. I'd love to have an electric one on the coach. I do plan to install one on my 65 Mustang.
Dan

3 In Stainless Exhaust Headers One Ton All Discs/Reaction Arm 355 FD/Quad Bag/Alum Radiator Manny Tran/New eng. Holley EFI/10 Tire Air Monitoring System Solarized Coach/Upgraded Windows Satelite TV/On Demand Hot Water/3Way Refer

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Re: [GMCnet] Fan clutch. [message #225158 is a reply to message #225148] Thu, 10 October 2013 22:40 Go to previous messageGo to next message
bobby5832708 is currently offline  bobby5832708   United States
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Registered: November 2006
Location: Winter Springs FL
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Tom,

I'm using a 2747 that's been 'slightly modified' to engage at a higher temp. It's not a Hayden, it's whatever Chinese brand Autozone sells.

Years ago I tried a 2797 and found that the difference between the engaged and disengaged speeds were far too great and the noise it made when fully engaged was far too loud. The sound reminded me of an International school bus from 1971. I think I picked up 15 horsepower just by removing the 2797! The 2797 lasted a couple of days and was exchanged for the 2747, there was no way I was going to drive a vehicle roaring like that.

The 2747 has the proper spread between engaged and disengaged speeds but at factory settings it engages too early for me. It's a long story, but I 'adjusted' the thermo spring so it comes on at a higher temp. A little bending of the spring goes a long way in making the fan clutch behave like I want it to.

I got about 6 years out of the first Chinese 2747 and replaced it this past summer because the bearing was starting to get a rumble to it. The new replacement had to have it's thermo spring 'adjusted' too.



Bob Heller
2017 Winnebago 29VE
Winter Springs FL

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Re: [GMCnet] Fan clutch. [message #225162 is a reply to message #225158] Thu, 10 October 2013 23:00 Go to previous messageGo to next message
mickeysss is currently offline  mickeysss   United States
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Registered: January 2012
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how do you adjust it? exactly if possible to explain.

thank you

best regards:

Mickey anaheim ca. 77 palm beach.

On Oct 10, 2013, at 8:40 PM, Bob Heller wrote:

>
>
> Tom,
>
> I'm using a 2747 that's been 'slightly modified' to engage at a higher temp. It's not a Hayden, it's whatever Chinese brand Autozone sells.
>
> Years ago I tried a 2797 and found that the difference between the engaged and disengaged speeds were far too great and the noise it made when fully engaged was far too loud. The sound reminded me of an International school bus from 1971. I think I picked up 15 horsepower just by removing the 2797! The 2797 lasted a couple of days and was exchanged for the 2747, there was no way I was going to drive a vehicle roaring like that.
>
> The 2747 has the proper spread between engaged and disengaged speeds but at factory settings it engages too early for me. It's a long story, but I 'adjusted' the thermo spring so it comes on at a higher temp. A little bending of the spring goes a long way in making the fan clutch behave like I want it to.
>
> I got about 6 years out of the first Chinese 2747 and replaced it this past summer because the bearing was starting to get a rumble to it. The new replacement had to have it's thermo spring 'adjusted' too.
>
>
> --
> Bob Heller
> 1974 X-Canyonlands 26ft
> Winter Springs FL
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist

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Re: [GMCnet] Fan clutch. [message #225166 is a reply to message #225148] Thu, 10 October 2013 23:46 Go to previous messageGo to next message
Ken Burton is currently offline  Ken Burton   United States
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Your experience mirrors exactly what I went through with multiple Haydens several years ago. After trying 4 severe and heavy duty clutches, Hayden tried to get me to modify mine to come on later at a higher temperature. I refused and returned all of them. I went to a Delco Heavy Duty one at Denny Allen's and Delco Engineeering's suggestion and never had a clutch issue again.



Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana

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Re: [GMCnet] Fan clutch. [message #225204 is a reply to message #225166] Fri, 11 October 2013 09:50 Go to previous messageGo to next message
xplorid is currently offline  xplorid   United States
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Location: Boise
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Ken - the delco fan clutch part number you used would be handy.

Has anyone used the ACDELCOOUTLET website? They list a 15-4208 for $69, but the site seems a little ... I'm not sure what. Maybe it's the russky.

And can I tell what fan clutch is installed on my engine without pulling it?

Jeff

1974/94 GMCII by Explorer Manny 6.5 TD Al radiator 1 ton front 4 bags back

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Re: [GMCnet] Fan clutch. [message #225259 is a reply to message #225204] Fri, 11 October 2013 15:44 Go to previous messageGo to next message
Ken Burton is currently offline  Ken Burton   United States
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Registered: January 2004
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I used the 15-4208

I went to the acdelcooutlet site you referred to and Firefox tells me the site is "untrusted". Based on that I would stay away from it.

It has been a few years sine I ordered one but I got them from ACdelcodirect.com

I believe it is now superseded by 15-4216

Here is a list of vehicles it was used on:

1979 BUICK LESABRE V6 3.8L 231cid GAS CARB N Engine VIN = A
1979 BUICK LESABRE SPORT V6 3.8L 231cid GAS CARB T Engine VIN = 3
1979 BUICK LESABRE V8 4.9L 301cid GAS CARB N Engine VIN = Y
1979 BUICK LESABRE V8 5.7L 350cid GAS CARB N Engine VIN = R
1979 BUICK LESABRE V8 5.7L 350cid GAS CARB N Engine VIN = X
1978 BUICK LESABRE V6 3.8L 231cid GAS CARB N Engine VIN = A
1978 BUICK LESABRE V8 4.9L 301cid GAS CARB N Engine VIN = Y
1978 BUICK LESABRE V8 5.0L 305cid GAS CARB N Engine VIN = U
1978 BUICK LESABRE V8 5.7L 350cid GAS CARB N Engine VIN = R
1978 BUICK LESABRE V8 5.7L 350cid GAS CARB N Engine VIN = X
1978 BUICK LESABRE V8 6.6L 403cid GAS CARB N Engine VIN = K
1978 BUICK RIVIERA V8 5.7L 350cid GAS CARB N Engine VIN = R
1978 BUICK RIVIERA V8 5.7L 350cid GAS CARB N Engine VIN = X
1978 BUICK RIVIERA V8 6.6L 403cid GAS CARB N Engine VIN = K
1977 BUICK CENTURY V8 5.7L 350cid GAS CARB N Engine VIN = H
1977 BUICK CENTURY V8 5.7L 350cid GAS CARB N Engine VIN = J
1977 BUICK CENTURY V8 5.7L 350cid GAS CARB N Engine VIN = L
1977 BUICK CENTURY V8 5.7L 350cid GAS CARB N Engine VIN = R
1977 BUICK ELECTRA 225 V8 6.6L 403cid GAS CARB N Engine VIN = K
1977 BUICK ELECTRA 225 LIMITED V8 6.6L 403cid GAS CARB N Engine VIN = K
1977 BUICK LESABRE V8 6.6L 403cid GAS CARB N Engine VIN = K
1977 BUICK REGAL V8 5.7L 350cid GAS CARB N Engine VIN = H
1977 BUICK REGAL V8 5.7L 350cid GAS CARB N Engine VIN = J
1977 BUICK REGAL V8 5.7L 350cid GAS CARB N Engine VIN = L
1977 BUICK REGAL V8 5.7L 350cid GAS CARB N Engine VIN = R
1977 BUICK RIVIERA V8 5.7L 350cid GAS CARB N Engine VIN = R
1977 BUICK RIVIERA V8 6.6L 403cid GAS CARB N Engine VIN = K
1977 PONTIAC BONNEVILLE BROUGHAM V8 6.6L 400cid GAS CARB N Engine VIN = Z
1977 PONTIAC BONNEVILLE V8 6.6L 400cid GAS CARB N Engine VIN = Z
1977 PONTIAC BONNEVILLE BROUGHAM V8 6.6L 403cid GAS CARB N Engine VIN = K
1977 PONTIAC BONNEVILLE V8 6.6L 403cid GAS CARB N Engine VIN = K
1977 PONTIAC CATALINA SAFARI V8 6.6L 400cid GAS CARB N Engine VIN = Z
1977 PONTIAC CATALINA V8 6.6L 400cid GAS CARB N Engine VIN = Z
1977 PONTIAC CATALINA SAFARI V8 6.6L 403cid GAS CARB N Engine VIN = K
1977 PONTIAC CATALINA V8 6.6L 403cid GAS CARB N Engine VIN = K
1977 PONTIAC FIREBIRD FORMULA V8 6.6L 400cid GAS CARB N Engine VIN = Z
1977 PONTIAC FIREBIRD TRANS AM V8 6.6L 400cid GAS CARB N Engine VIN = Z
1977 PONTIAC FIREBIRD V8 6.6L 400cid GAS CARB N Engine VIN = Z
1977 PONTIAC FIREBIRD FORMULA V8 6.6L 403cid GAS CARB N Engine VIN = K
1977 PONTIAC FIREBIRD TRANS AM V8 6.6L 403cid GAS CARB N Engine VIN = K
1977 PONTIAC FIREBIRD V8 6.6L 403cid GAS CARB N Engine VIN = K
1977 PONTIAC GRAND PRIX LJ V8 6.6L 400cid GAS CARB N Engine VIN = Z
1977 PONTIAC GRAND PRIX SJ V8 6.6L 400cid GAS CARB N Engine VIN = Z
1977 PONTIAC GRAND PRIX V8 6.6L 400cid GAS CARB N Engine VIN = Z
1977 PONTIAC GRAND PRIX LJ V8 6.6L 403cid GAS CARB N Engine VIN = K
1977 PONTIAC GRAND PRIX SJ V8 6.6L 403cid GAS CARB N Engine VIN = K
1977 PONTIAC GRAND PRIX V8 6.6L 403cid GAS CARB N Engine VIN = K
1977 PONTIAC LEMANS SAFARI V8 6.6L 400cid GAS CARB N Engine VIN = Z
1977 PONTIAC LEMANS V8 6.6L 400cid GAS CARB N Engine VIN = Z
1977 PONTIAC LEMANS SAFARI V8 6.6L 403cid GAS CARB N Engine VIN = K
1977 PONTIAC LEMANS V8 6.6L 403cid GAS CARB N Engine VIN = K
1976 BUICK CENTURY V8 5.7L 350cid GAS CARB N Engine VIN = H
1976 BUICK CENTURY V8 5.7L 350cid GAS CARB N Engine VIN = J
1976 BUICK ELECTRA 225 V8 7.5L 455cid GAS CARB N Engine VIN = T
1976 BUICK ELECTRA LIMITED V8 7.5L 455cid GAS CARB N Engine VIN = T
1976 BUICK REGAL V8 5.7L 350cid GAS CARB N Engine VIN = H
1976 BUICK REGAL V8 5.7L 350cid GAS CARB N Engine VIN = J
1976 BUICK RIVIERA V8 7.5L 455cid GAS CARB N Engine VIN = T
1976 BUICK SKYLARK S V8 5.7L 350cid GAS CARB N Engine VIN = H
1976 BUICK SKYLARK SR V8 5.7L 350cid GAS CARB N Engine VIN = H
1976 BUICK SKYLARK V8 5.7L 350cid GAS CARB N Engine VIN = H
1976 BUICK SKYLARK S V8 5.7L 350cid GAS CARB N Engine VIN = J
1976 BUICK SKYLARK SR V8 5.7L 350cid GAS CARB N Engine VIN = J
1976 BUICK SKYLARK V8 5.7L 350cid GAS CARB N Engine VIN = J
1976 OLDSMOBILE OMEGA BROUGHAM V8 5.7L 350cid GAS CARB N Engine VIN = H
1976 OLDSMOBILE OMEGA F85 V8 5.7L 350cid GAS CARB N Engine VIN = H
1976 OLDSMOBILE OMEGA V8 5.7L 350cid GAS CARB N Engine VIN = H
1976 OLDSMOBILE OMEGA BROUGHAM V8 5.7L 350cid GAS CARB N Engine VIN = J
1976 OLDSMOBILE OMEGA F85 V8 5.7L 350cid GAS CARB N Engine VIN = J
1976 OLDSMOBILE OMEGA V8 5.7L 350cid GAS CARB N Engine VIN = J
1976 PONTIAC VENTURA SJ V8 5.7L 350cid GAS CARB N Engine VIN = H
1976 PONTIAC VENTURA V8 5.7L 350cid GAS CARB N Engine VIN = H
1976 PONTIAC VENTURA SJ V8 5.7L 350cid GAS CARB N Engine VIN = J
1976 PONTIAC VENTURA V8 5.7L 350cid GAS CARB N Engine VIN = J
1975 BUICK APOLLO SR V8 5.7L 350cid GAS CARB N Engine VIN = H
1975 BUICK APOLLO V8 5.7L 350cid GAS CARB N Engine VIN = H
1975 BUICK APOLLO SR V8 5.7L 350cid GAS CARB N Engine VIN = J
1975 BUICK APOLLO V8 5.7L 350cid GAS CARB N Engine VIN = J
1975 BUICK CENTURY V8 5.7L 350cid GAS CARB N Engine VIN = H
1975 BUICK CENTURY V8 5.7L 350cid GAS CARB N Engine VIN = J
1975 BUICK ELECTRA 225 CUSTOM V8 7.5L 455cid GAS CARB N Engine VIN = T
1975 BUICK ELECTRA 225 LIMITED V8 7.5L 455cid GAS CARB N Engine VIN = T
1975 BUICK LESABRE V8 5.7L 350cid GAS CARB N Engine VIN = J
1975 BUICK LESABRE V8 7.5L 455cid GAS CARB N Engine VIN = T
1975 BUICK REGAL V8 5.7L 350cid GAS CARB N Engine VIN = H
1975 BUICK REGAL V8 5.7L 350cid GAS CARB N Engine VIN = J
1975 BUICK RIVIERA V8 7.5L 455cid GAS CARB N Engine VIN = T
1975 BUICK SKYLARK SR V8 5.7L 350cid GAS CARB N Engine VIN = H
1975 BUICK SKYLARK V8 5.7L 350cid GAS CARB N Engine VIN = H
1975 BUICK SKYLARK SR V8 5.7L 350cid GAS CARB N Engine VIN = J
1975 BUICK SKYLARK V8 5.7L 350cid GAS CARB N Engine VIN = J
1975 OLDSMOBILE OMEGA SALON V8 5.7L 350cid GAS CARB N Engine VIN = H
1975 OLDSMOBILE OMEGA V8 5.7L 350cid GAS CARB N Engine VIN = H
1975 OLDSMOBILE OMEGA SALON V8 5.7L 350cid GAS CARB N Engine VIN = J
1975 OLDSMOBILE OMEGA V8 5.7L 350cid GAS CARB N Engine VIN = J
1975 PONTIAC VENTURA S V8 5.7L 350cid GAS CARB N Engine VIN = E
1975 PONTIAC VENTURA V8 5.7L 350cid GAS CARB N Engine VIN = E
1975 PONTIAC VENTURA CUSTOM V8 5.7L 350cid GAS CARB N Engine VIN = H
1975 PONTIAC VENTURA SJ V8 5.7L 350cid GAS CARB N Engine VIN = H
1975 PONTIAC VENTURA V8 5.7L 350cid GAS CARB N Engine VIN = H
1975 PONTIAC VENTURA CUSTOM V8 5.7L 350cid GAS CARB N Engine VIN = J
1975 PONTIAC VENTURA SJ V8 5.7L 350cid GAS CARB N Engine VIN = J
1975 PONTIAC VENTURA V8 5.7L 350cid GAS CARB N Engine VIN = J
1975 PONTIAC VENTURA CUSTOM V8 5.7L 350cid GAS CARB N Engine VIN = M
1975 PONTIAC VENTURA S V8 5.7L 350cid GAS CARB N Engine VIN = M
1974 BUICK APOLLO V8 5.7L 350cid GAS CARB N Engine VIN = H
1974 BUICK APOLLO V8 5.7L 350cid GAS CARB N Engine VIN = J
1974 BUICK CENTURY V8 5.7L 350cid GAS CARB N Engine VIN = H
1974 BUICK CENTURY V8 5.7L 350cid GAS CARB N Engine VIN = J
1974 BUICK CENTURY V8 7.5L 455cid GAS CARB N Engine VIN = R
1974 BUICK CENTURY V8 7.5L 455cid GAS CARB N Engine VIN = U
1974 BUICK CENTURY V8 7.5L 455cid GAS CARB N Engine VIN = V
1974 BUICK ELECTRA 225 V8 7.5L 455cid GAS CARB N Engine VIN = T
1974 BUICK ELECTRA 225 CUSTOM V8 7.5L 455cid GAS CARB N Engine VIN = T
1974 BUICK ELECTRA 225 LIMITED V8 7.5L 455cid GAS CARB N Engine VIN = T
1974 BUICK ELECTRA 225 V8 7.5L 455cid GAS CARB N Engine VIN = U
1974 BUICK ELECTRA 225 CUSTOM V8 7.5L 455cid GAS CARB N Engine VIN = U
1974 BUICK ELECTRA 225 LIMITED V8 7.5L 455cid GAS CARB N Engine VIN = U
1974 BUICK ELECTRA 225 V8 7.5L 455cid GAS CARB N Engine VIN = W
1974 BUICK ELECTRA 225 CUSTOM V8 7.5L 455cid GAS CARB N Engine VIN = W
1974 BUICK ELECTRA 225 LIMITED V8 7.5L 455cid GAS CARB N Engine VIN = W
1974 BUICK LESABRE V8 5.7L 350cid GAS CARB N Engine VIN = H
1974 BUICK LESABRE V8 5.7L 350cid GAS CARB N Engine VIN = J
1974 BUICK LESABRE V8 7.5L 455cid GAS CARB N Engine VIN = P
1974 BUICK LESABRE V8 7.5L 455cid GAS CARB N Engine VIN = R
1974 BUICK LESABRE V8 7.5L 455cid GAS CARB N Engine VIN = T
1974 BUICK LESABRE V8 7.5L 455cid GAS CARB N Engine VIN = U
1974 BUICK REGAL V8 5.7L 350cid GAS CARB N Engine VIN = H
1974 BUICK REGAL V8 5.7L 350cid GAS CARB N Engine VIN = J
1974 BUICK REGAL V8 7.5L 455cid GAS CARB N
1974 BUICK RIVIERA V8 7.5L 455cid GAS CARB N Engine VIN = U
1974 BUICK RIVIERA V8 7.5L 455cid GAS CARB N Engine VIN = W
1973 BUICK APOLLO V8 5.7L 350cid GAS CARB N Engine VIN = H
1973 BUICK APOLLO V8 5.7L 350cid GAS CARB N Engine VIN = J
1973 BUICK ELECTRA 225 V8 7.5L 455cid GAS CARB N Engine VIN = T
1973 BUICK ELECTRA 225 CUSTOM V8 7.5L 455cid GAS CARB N Engine VIN = T
1973 BUICK ELECTRA V8 7.5L 455cid GAS CARB N Engine VIN = V
1973 BUICK LESABRE V8 5.7L 350cid GAS CARB N Engine VIN = H
1973 BUICK LESABRE V8 5.7L 350cid GAS CARB N Engine VIN = J
1973 BUICK RIVIERA V8 7.5L 455cid GAS CARB N Engine VIN = U
1973 CADILLAC ELDORADO V8 8.2L 500cid GAS CARB N Engine VIN = S
1972 BUICK CENTURION V8 7.5L 455cid GAS CARB N Engine VIN = T
1972 BUICK CENTURION V8 7.5L 455cid GAS CARB N Engine VIN = W
1972 BUICK ELECTRA 225 V8 7.5L 455cid GAS CARB N Engine VIN = T
1972 BUICK ELECTRA 225 CUSTOM V8 7.5L 455cid GAS CARB N Engine VIN = T
1972 BUICK LESABRE CUSTOM V8 7.5L 455cid GAS CARB N Engine VIN = T
1972 BUICK LESABRE V8 7.5L 455cid GAS CARB N Engine VIN = T
1971 BUICK CENTURION V8 7.5L 455cid GAS CARB N
1971 BUICK ELECTRA 225 V8 7.5L 455cid GAS CARB N
1971 BUICK ELECTRA 225 CUSTOM V8 7.5L 455cid GAS CARB N
1971 BUICK LESABRE CUSTOM V8 7.5L 455cid GAS CARB N
1971 BUICK LESABRE V8 7.5L 455cid GAS CARB N
1970 BUICK ELECTRA 225 V8 7.5L 455cid GAS CARB N
1970 BUICK ELECTRA 225 CUSTOM V8 7.5L 455cid GAS CARB N
1970 BUICK RIVIERA V8 7.5L 455cid GAS CARB N
1969 BUICK ELECTRA 225 V8 7.0L 430cid GAS CARB N
1969 BUICK ELECTRA 225 CUSTOM V8 7.0L 430cid GAS CARB N
1969 BUICK RIVIERA V8 7.0L 430cid GAS CARB N
1969 BUICK WILDCAT CUSTOM V8 7.0L 430cid GAS CARB N
1969 BUICK WILDCAT V8 7.0L 430cid GAS CARB N
1968 BUICK ELECTRA 225 V8 7.0L 430cid GAS CARB N
1968 BUICK ELECTRA 225 CUSTOM V8 7.0L 430cid GAS CARB N
1968 BUICK RIVIERA V8 7.0L 430cid GAS CARB N
1968 BUICK WILDCAT CUSTOM V8 7.0L 430cid GAS CARB N
1968 BUICK WILDCAT V8 7.0L 430cid GAS CARB N
1967 BUICK ELECTRA V8 7.0L 430cid GAS CARB N
1967 BUICK RIVIERA V8 7.0L 430cid GAS CARB N
1967 BUICK WILDCAT V8 7.0L 430cid GAS CARB N
1966 BUICK ELECTRA V8 6.6L 401cid GAS CARB N
1966 BUICK ELECTRA V8 7.0L 425cid GAS CARB N
1966 BUICK RIVIERA V8 7.0L 425cid GAS CARB N


My laptop just hung up so I'll send this much, then rebboot, and see if I can find and old invoice.

Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana

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Re: [GMCnet] Fan clutch. [message #225264 is a reply to message #225259] Fri, 11 October 2013 16:24 Go to previous messageGo to next message
Ken Burton is currently offline  Ken Burton   United States
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OK,

I found an invoice for one I ordered ad sent to Canada in 2006 for $49.75 plus $6.16 shipping. The part number is 15-4208. I'm sure the price is higher now.

I have found 2 superceeded numbers for the 15-4208. They are 15-4947 and 15-4216

The site was http://www.AC-direct.com. It is no longer a valid site.

I also ordered one for someone a few years back off of ebay.

I wish Jim K. would stock these to make it easy for everyone but he only has the severe duty one (15-4944).

Note: A trace on that acdelcooutlet.com site says the server is located in Germany. I think I would stay away from it.

Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana

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Re: [GMCnet] Fan clutch. [message #225276 is a reply to message #225264] Fri, 11 October 2013 17:52 Go to previous messageGo to next message
xplorid is currently offline  xplorid   United States
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and 15-4947 application includes 1968-1983 Toronado and:

1976 V8-455ci 7.5L 4 BBL Vin S

1975 V8-455ci 7.5L 4 BBL Vin W

1974 V8-455ci 7.5L 4 BBL Vin W

1973 V8-455ci 7.5L 4 BBL Vin W

1972 V8-455ci 7.5L 4 BBL Vin W

1971 V8-455ci 7.5L 4 BBL Vin US UT

1970 V8-455ci 7.5L 4 BBL Vin US UT UV UW

1969 V8-455ci 7.5L 4 BBL Vin US UT UV UW

1968 V8-455ci 7.5L 4 BBL Vin US UT UV UW

1974/94 GMCII by Explorer Manny 6.5 TD Al radiator 1 ton front 4 bags back

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Re: [GMCnet] Fan clutch. [message #225278 is a reply to message #225276] Fri, 11 October 2013 17:55 Go to previous messageGo to next message
xplorid is currently offline  xplorid   United States
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15-4947 also includes1977 V8-403ci 6.6L 4 BBL Vin K

1974/94 GMCII by Explorer Manny 6.5 TD Al radiator 1 ton front 4 bags back

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Re: [GMCnet] Fan clutch. [message #225296 is a reply to message #225264] Fri, 11 October 2013 20:31 Go to previous messageGo to next message
emerystora is currently offline  emerystora   United States
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Ken

I think that you have your numbers screwed up.
Kanomata carries the 15-4644 clutch, not the 15-4944 clutch.
The new number is 15-40108.

AC/Delco lists this for the 350 cu inch diesel engine.

Emery Stora

On Oct 11, 2013, at 3:24 PM, Ken Burton wrote:

>
>
> OK,
>
> I found an invoice for one I ordered ad sent to Canada in 2006 for $49.75 plus $6.16 shipping. The part number is 15-4208. I'm sure the price is higher now.
>
> I have found 2 superceeded numbers for the 15-4208. They are 15-4947 and 15-4216
>
> The site was http://www.AC-direct.com. It is no longer a valid site.
>
> I also ordered one for someone a few years back off of ebay.
>
> I wish Jim K. would stock these to make it easy for everyone but he only has the severe duty one (15-4944).
>
> Note: A trace on that acdelcooutlet.com site says the server is located in Germany. I think I would stay away from it.
> --
> Ken Burton - N9KB
> 76 Palm Beach
> Hebron, Indiana
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Re: [GMCnet] Fan clutch. [message #225300 is a reply to message #225296] Fri, 11 October 2013 20:58 Go to previous messageGo to next message
Ken Burton is currently offline  Ken Burton   United States
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
Senior Member
You are correct. I was any never good at numbers.

Ken B.

emerystora wrote on Fri, 11 October 2013 20:31

Ken

I think that you have your numbers screwed up.
Kanomata carries the 15-4644 clutch, not the 15-4944 clutch.
The new number is 15-40108.

AC/Delco lists this for the 350 cu inch diesel engine.

Emery Stora

On Oct 11, 2013, at 3:24 PM, Ken Burton wrote:

>
>
> OK,
>
> I found an invoice for one I ordered ad sent to Canada in 2006 for $49.75 plus $6.16 shipping. The part number is 15-4208. I'm sure the price is higher now.
>
> I have found 2 superceeded numbers for the 15-4208. They are 15-4947 and 15-4216
>
> The site was http://www.AC-direct.com. It is no longer a valid site.
>
> I also ordered one for someone a few years back off of ebay.
>
> I wish Jim K. would stock these to make it easy for everyone but he only has the severe duty one (15-4944).
>
> Note: A trace on that acdelcooutlet.com site says the server is located in Germany. I think I would stay away from it.
> --
> Ken Burton - N9KB
> 76 Palm Beach
> Hebron, Indiana
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist

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Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana

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Re: [GMCnet] Fan clutch. [message #225599 is a reply to message #225276] Mon, 14 October 2013 11:30 Go to previous message
Ray Erspamer is currently offline  Ray Erspamer   United States
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
Karma: -3
Senior Member
For the Heavy Duty fan clutch, which engages to approx 70% of the engine RPM, does anyone know or has calculated the CFM the standard GMC fan blade generates.... say at 2500 RPM ???


 
Ray
78 Royale - "The Great Lakes Eagle"
Center Kitchen TZE368V101144
Wauwatosa, Wisconsin 53226
Email: 78GMC-Royale@att.net
414-484-9431
Web Site: http://ray-lisa.page.tl/


________________________________
From: jeff sugheir <jeff.sugheir@gmail.com>
To: gmclist@temp.gmcnet.org
Sent: Friday, October 11, 2013 5:52 PM
Subject: Re: [GMCnet] Fan clutch.




and 15-4947 application includes 1968-1983 Toronado and:

1976 V8-455ci 7.5L 4 BBL Vin S

1975 V8-455ci 7.5L 4 BBL Vin W

1974 V8-455ci 7.5L 4 BBL Vin W

1973 V8-455ci 7.5L 4 BBL Vin W

1972 V8-455ci 7.5L 4 BBL Vin W

1971 V8-455ci 7.5L 4 BBL Vin US UT

1970 V8-455ci 7.5L 4 BBL Vin US UT UV UW

1969 V8-455ci 7.5L 4 BBL Vin US UT UV UW

1968 V8-455ci 7.5L 4 BBL Vin US UT UV UW

--
1973/94 GMCII in Boise 76 455 with headers & Paterson distributor,1 ton front, 4 bags back, Precision Steering Gearbox


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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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