The 77/78 403's came from GM with a very strong plastic/fiber fan shroud. This fan fits perfectly just ahead of the shroud venture. And the fans outer ring makes for a very smooth transition to the shroud. Thus the shroud didn't have to be cut at all. I did make the one piece shroud into a two piece. Upper/lower. This will make that area more excisable in the future. Bob Dunahugh 78 Royale
Put Mercedes Benz fan in tonight. Perfect fit to the GM fan shroud. No cutting needed
- Thread starter Bob Dunahugh
- Start date
> The 77/78 403's came from GM with a very strong plastic/fiber fan shroud.
> This fan fits perfectly just ahead of the shroud venture. And the fans
> outer ring makes for a very smooth transition to the shroud. Thus the
> shroud didn't have to be cut at all. I did make the one piece shroud
> into a two piece. Upper/lower. This will make that area more excisable in
> the future. Bob Dunahugh 78 Royale
> _______________________________________________
Pix would be good
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--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://bdub.net/gmcmotorhome.info/
Alternator Protection Cable
http://bdub.net/gmcmotorhome.info/APC.html
> This fan fits perfectly just ahead of the shroud venture. And the fans
> outer ring makes for a very smooth transition to the shroud. Thus the
> shroud didn't have to be cut at all. I did make the one piece shroud
> into a two piece. Upper/lower. This will make that area more excisable in
> the future. Bob Dunahugh 78 Royale
> _______________________________________________
Pix would be good
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://bdub.net/gmcmotorhome.info/
Alternator Protection Cable
http://bdub.net/gmcmotorhome.info/APC.html
I'm thinking of installing one of these fans on my coach, but from what I can tell, this fan is not supposed to work with an early fan shroud.
However, I'm not entirely sure my coach still has the early shroud.... Does anyone know where I can find some pics of the different shrouds that
came on the various years of GMCs?
--
Mark S. '73 Painted Desert,
Manny 1 Ton Front End,
Howell Injection,
Leigh Harrison 4bag and Rear Brakes,
Fort Worth, TX
However, I'm not entirely sure my coach still has the early shroud.... Does anyone know where I can find some pics of the different shrouds that
came on the various years of GMCs?
--
Mark S. '73 Painted Desert,
Manny 1 Ton Front End,
Howell Injection,
Leigh Harrison 4bag and Rear Brakes,
Fort Worth, TX
The earlier one has a metal ring
Sent from my iPhone
>
> I'm thinking of installing one of these fans on my coach, but from what I can tell, this fan is not supposed to work with an early fan shroud.
> However, I'm not entirely sure my coach still has the early shroud.... Does anyone know where I can find some pics of the different shrouds that
> came on the various years of GMCs?
> --
> Mark S. '73 Painted Desert,
> Manny 1 Ton Front End,
> Howell Injection,
> Leigh Harrison 4bag and Rear Brakes,
> Fort Worth, TX
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Sent from my iPhone
>
> I'm thinking of installing one of these fans on my coach, but from what I can tell, this fan is not supposed to work with an early fan shroud.
> However, I'm not entirely sure my coach still has the early shroud.... Does anyone know where I can find some pics of the different shrouds that
> came on the various years of GMCs?
> --
> Mark S. '73 Painted Desert,
> Manny 1 Ton Front End,
> Howell Injection,
> Leigh Harrison 4bag and Rear Brakes,
> Fort Worth, TX
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> I'm thinking of installing one of these fans on my coach, but from what I can tell, this fan is not supposed to work with an early fan shroud.
> However, I'm not entirely sure my coach still has the early shroud.... Does anyone know where I can find some pics of the different shrouds that
> came on the various years of GMCs?
Mark,
The fan is not compatible with the "Horse collar" shroud. If there are brackets between the engine and the shroud, that is what you have. If there
are none and no hard ring at the fan tips, then something has been changed, You might be able to simply remove the rubber part of the existing should
and then have room for the new fan.
If I were not otherwise busy, I would check this for you. I may have time later in the week.
Matt
--
Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan
OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit
> However, I'm not entirely sure my coach still has the early shroud.... Does anyone know where I can find some pics of the different shrouds that
> came on the various years of GMCs?
Mark,
The fan is not compatible with the "Horse collar" shroud. If there are brackets between the engine and the shroud, that is what you have. If there
are none and no hard ring at the fan tips, then something has been changed, You might be able to simply remove the rubber part of the existing should
and then have room for the new fan.
If I were not otherwise busy, I would check this for you. I may have time later in the week.
Matt
--
Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan
OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit
I sent the e-mail below out at 10:03 AM. But didn't show up at the 11:00 AM digest post. Bob Dunahugh
________________________________
From: Bob Dunahugh
Sent: Monday, March 5, 2018 10:03 AM
To: gmclist
Subject: RE: Put Mercedes Benz fan in tonight. Perfect fit to the GM fan shroud. No cutting needed
I'll take some photos after lunch. Can I send the photos to someone to post? Contact me privately. As I get these e-mails by digest. Bob Dunahugh
________________________________
From: Bob Dunahugh
Sent: Monday, March 5, 2018 1:05 AM
To: gmclist
Subject: Put Mercedes Benz fan in tonight. Perfect fit to the GM fan shroud. No cutting needed
The 77/78 403's came from GM with a very strong plastic/fiber fan shroud. This fan fits perfectly just ahead of the shroud venture. And the fans outer ring makes for a very smooth transition to the shroud. Thus the shroud didn't have to be cut at all. I did make the one piece shroud into a two piece. Upper/lower. This will make that area more excisable in the future. Bob Dunahugh 78 Royale
________________________________
From: Bob Dunahugh
Sent: Monday, March 5, 2018 10:03 AM
To: gmclist
Subject: RE: Put Mercedes Benz fan in tonight. Perfect fit to the GM fan shroud. No cutting needed
I'll take some photos after lunch. Can I send the photos to someone to post? Contact me privately. As I get these e-mails by digest. Bob Dunahugh
________________________________
From: Bob Dunahugh
Sent: Monday, March 5, 2018 1:05 AM
To: gmclist
Subject: Put Mercedes Benz fan in tonight. Perfect fit to the GM fan shroud. No cutting needed
The 77/78 403's came from GM with a very strong plastic/fiber fan shroud. This fan fits perfectly just ahead of the shroud venture. And the fans outer ring makes for a very smooth transition to the shroud. Thus the shroud didn't have to be cut at all. I did make the one piece shroud into a two piece. Upper/lower. This will make that area more excisable in the future. Bob Dunahugh 78 Royale
