| Original carburetor gone [message #343883] |
Mon, 03 June 2019 17:25  |
mballar
Messages: 20
Registered: March 2018
Location: West Central Missouri
Karma: 0
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Junior Member |
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Hi all,
As part of an engine swap, my mechanic had problems getting the original carburetor rebuilt and ended up getting a rebuilt replacement. The rebuilt part isn't the same carburetor as the original Quadrajet 7045254 model and I can tell it doesn't work quite right. I'd like to get back to a good working product but finding a rebuilt or even the correct core has proven very difficult so far.
So if your 7045254 core is gone, what do you do?
Mike & Apryl Ballard
Fair Play, Missouri
1975 Glenbrook
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| Re: Original carburetor gone [message #343884 is a reply to message #343883] |
Mon, 03 June 2019 17:40  |
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Tom Lins
Messages: 372
Registered: February 2004
Location: St Augustine, FL
Karma: 1
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mballar wrote on Mon, 03 June 2019 18:25Hi all,
As part of an engine swap, my mechanic had problems getting the original carburetor rebuilt and ended up getting a rebuilt replacement. The rebuilt part isn't the same carburetor as the original Quadrajet 7045254 model and I can tell it doesn't work quite right. I'd like to get back to a good working product but finding a rebuilt or even the correct core has proven very difficult so far.
So if your 7045254 core is gone, what do you do?
There is one on eBay
https://www.ebay.com/itm/rochester-4bbl-7045254-1975-76-chevy-motorhome-454-all-t-fed-cal/173677522613?hash=item286ffcaeb5:g:2DEAAOSwtFxcCGoJ:sc:USPSP riorityMailLargeFlatRateBox!32033!US!-1
Tom Lins
St Augustine, FL
77 GM Rear Twin, Dry Bath, 455, Aluminum Radiator Quad-Bag Suspension Solar Panel
Manuals on DVD
YOUTUBE Channel: GMC Dealer Training Tapes
http://www.bdub.net/tomlins/
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| Re: Original carburetor gone [message #343885 is a reply to message #343884] |
Mon, 03 June 2019 17:51 |
mballar
Messages: 20
Registered: March 2018
Location: West Central Missouri
Karma: 0
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Junior Member |
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Checking on that one now. I think I can see the numbers stamped on the casting, but I want to be sure.
Mike & Apryl Ballard
Fair Play, Missouri
1975 Glenbrook
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| Re: [GMCnet] Original carburetor gone [message #343886 is a reply to message #343883] |
Mon, 03 June 2019 18:20 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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I can help you out.
On Mon, Jun 3, 2019 at 3:26 PM Mike Ballard via Gmclist <
gmclist@list.gmcnet.org> wrote:
> Hi all,
>
> As part of an engine swap, my mechanic had problems getting the original
> carburetor rebuilt and ended up getting a rebuilt replacement. The rebuilt
> part isn't the same carburetor as the original Quadrajet 7045254 model and
> I can tell it doesn't work quite right. I'd like to get back to a good
> working product but finding a rebuilt or even the correct core has proven
> very difficult so far.
>
> So if your 7045254 core is gone, what do you do?
> --
> Mike & Apryl Ballard
> Fair Play, Missouri
> 1975 Glenbrook
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Original carburetor gone [message #343907 is a reply to message #343885] |
Tue, 04 June 2019 10:40 |
powwerjon
Messages: 849
Registered: March 2013
Karma: -2
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Senior Member |
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Words of Wisdom on getting a carb repaired or rebuild. There are only one of two shops that can really rebuild the carbs that have the correct. Jim B has a shop that he trust and there may be others out there, but the only one that truly knows the GMC motorhome carb is Dick Paterson. It will work right out of the box.
http://www.springfield-ignition.com/gmc-motorhome/carburation/
Never, Never, Never let that original carb out of your possession or lose it, because it is different than the cars from cars or trucks. There is a very high core charge if one is available.
http://www.appliedgmc.com/prod.itml/icOid/570
J.R. Wright
GMC Great Laker MHC
GMCGL Tech Editor
GMC Eastern States Charter Member
GMCMI
78 GMC Buskirk 29.5’ Stretch
75 GMC Avion (Under Reconstruction)
Michigan
> On Jun 3, 2019, at 6:51 PM, Mike Ballard via Gmclist wrote:
>
> Checking on that one now. I think I can see the numbers stamped on the casting, but I want to be sure.
> --
> Mike & Apryl Ballard
> Fair Play, Missouri
> 1975 Glenbrook
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| Re: [GMCnet] Original carburetor gone [message #343909 is a reply to message #343907] |
Tue, 04 June 2019 11:10 |
GatsbysCruise
Messages: 261
Registered: January 2017
Location: Waukegan, Illinois
Karma: 3
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Senior Member |
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You need to go back to your mechanic and TELL HIM YOU NEED THAT ORIGINAL CARBORATOR BACK!
Once that carb is lost in the motor jungle, it won't be found again and the numbers are
matched to your RV.
I only recommend ONE shop to rebuild the GMC carborators, that would be Dick Paterson.
He is doing his own work, knows the carb inside and out and has never had any problems
with any rebuilt carbs.
I am not sure if he will out right sell a GMC (specialized) carb but I know he asks for
the original body of the GMC (specialized) carb for the rebuild.
I've had bad experiences, no CRIPPLING EXPERIENCES with shops that say they know carbs and screwed them up
extremely badly. DO NOT ALLOW ANY CARBORATOR SHOP THAT YOU DO NOT KNOW PERSONALLY, WORK ON YOUR
SPECIALIZED GMC Motorhome CARB. And I mean the shop that works on the carb, not a shop that uses a shop.
slc
GatsbysCruise. \
74GMC260 Former Glacier Model style. \
Waukegan, Illinois \ Keep those MiniDiscs Spinning \ MY GREYHOUND IS FASTER THAN YOUR HONOR ROLL STUDENT \ WindowsXP-Win7-Win8.1-UBUNTU STUDIO - UBUNTU VOYAGER - Berzin Auto Center
[Updated on: Tue, 04 June 2019 11:26] Report message to a moderator |
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| Re: [GMCnet] Original carburetor gone [message #343911 is a reply to message #343909] |
Tue, 04 June 2019 11:33 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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I have been to Dick and Jan's home near Barrie, Ontario, Canada, and he
allowed us to use his shop and tools to do some work on coaches that were
traveling across Canada together. His carb flow bench is an actual
GMC/Oldsmobile front clip. Every carb that he reconstructs goes on that 455
and is run and adjusted until he is satisfied with it. No better way to do
it exists in my opinion. And, I have lots of personal experience with
Dynamometers and flow benches.
He mentioned while we were there that it was a very rare happening
that both he and I were together working in the same shop collaboratively
working on a GMC. I took that as one of those rare compliments from a
legend in this business.
He is a living treasure trove of GM information, one of the Greats. He
is a true friend and his wife is a peach. We share a common love of Ford
engines that have their valves in the correct place, the block.
Jim Hupy
On Tue, Jun 4, 2019, 9:11 AM slc via Gmclist
wrote:
> I only recommend ONE shop to rebuild the GMC carborators, that would be
> Dick Paterson.
>
> He is doing his own work, knows the carb inside and out and has never had
> any problems
>
> with any rebuilt carbs.
>
> I am not sure if he will out right sell a GMC (specialized) carb but I
> know he asks for
>
> the original body of the GMC (specialized) carb for the rebuild.
>
> I've had bad experiences with shops that say they know carbs and screwed
> them up
>
> extremely badly.
>
> slc
> --
> GatsbysCruise. \
> 74GMC260 Former Glacier Model style. \
> Waukegan, Illinois \ Keep those MiniDiscs Spinning \ MY GREYHOUND IS
> FASTER THAN YOUR HONOR ROLL STUDENT \ WindowsXP-Win7-Win8.1-UBUNTU STUDIO -
> UBUNTU VOYAGER - Berzin Auto Center
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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| Re: Original carburetor gone [message #343919 is a reply to message #343883] |
Tue, 04 June 2019 14:41 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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Jim, if you can find a pair - there were very few made - a set of Ar-Dun OHV heads will turn your flathead kitty into a wildcat. Otherwise, a set of Offenhauser heads, dual manifold, a pair of 97s and a 3/4 cam will get it moving fairly nicely.
Duntov was making speed before GM turned him loose on the 'vette.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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