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Rochester carb ??
#1408105 Fri Apr 30 2021 10:09 PM
Joined: Dec 2020
Posts: 59
L
'Bolter
I looked at the Rochester carb that was on my 235 today. It was very clean inside and all I need are a few gaskets and accelerator pump. How do I identify the carb? It looks like the other post that buoymaker posted a picture of.
Is it the 7003536 -C-14 number that is on the bottom of the bowl? When looking at carb kits they are not very accurate in the pictures of the parts. The accelerator pump on my carb has a round shaft not flat like they sometimes show in the pictures. It has a automatic choke that was not complete, the bimetal spring was missing. The exhaust manifold has a shield that would of had a heat tube originally. But that is not there. It has a manual choke now. This engine is a 59 truck 235 by serial number.

Last edited by lumbersawyer; Fri Apr 30 2021 10:12 PM.
Re: Rochester carb ??
lumbersawyer #1408109 Fri Apr 30 2021 10:41 PM
Joined: Feb 2019
Posts: 2,287
P
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The carbs originally came with a tag attached to one of the screws that fasten the top cover on. Many of these tags were lost during a rebuild. On some (not all) of the carbs, they stamped the last 4 or 5 digit number on the base where it attaches to the manifold. Add 700 to the beginning of a 4 digit number or 70 for a five digit number. In my case it would be 7005921. Hope this helps!

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2D6B02E4-F958-49E3-B472-8A3B3792B7B6.jpeg (169.62 KB, 117 downloads)
Last edited by Phak1; Fri Apr 30 2021 10:47 PM.

Phil

1952 Chevrolet 3100
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‘59 235 w/hydraulic lifters
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Re: Rochester carb ??
lumbersawyer #1408112 Fri Apr 30 2021 10:56 PM
Joined: Jul 2000
Posts: 1,361
G
Insomniac
That number is the bowl casting number - pretty well useless.

Carb # should be something like 7013029 or 7013953.

Last edited by Gord&Fran; Fri Apr 30 2021 10:57 PM.

Gord
----
1954 1/2 ton 235 4 speed
Re: Rochester carb ??
lumbersawyer #1408134 Sat May 01 2021 01:29 AM
Joined: Dec 2020
Posts: 59
L
'Bolter
Ok, the cast base does have some numbers stamped on it. Looks to be 12127.

Attached Files
Last edited by lumbersawyer; Sat May 01 2021 08:20 PM.
Re: Rochester carb ??
lumbersawyer #1408142 Sat May 01 2021 02:54 AM
Joined: Jul 2000
Posts: 1,361
G
Insomniac
From:
https://www.thecarburetorshop.com/Kchevrolet1.htm

1958 6 235 S/T Rochester BC 7012127 2639


Gord
----
1954 1/2 ton 235 4 speed
Re: Rochester carb ??
lumbersawyer #1408145 Sat May 01 2021 03:12 AM
Joined: Dec 2020
Posts: 59
L
'Bolter
Thanks, I tried finding carb kits for a one barrel and got a varied search result. So a Rochester BC with standard trans. My engine serial is a truck engine and I was told the carb with a automatic choke was for a car not a truck,Thanks much.

Last edited by lumbersawyer; Sat May 01 2021 03:40 AM.
Re: Rochester carb ??
lumbersawyer #1408150 Sat May 01 2021 03:37 AM
Joined: Jul 2000
Posts: 1,361
G
Insomniac
Yes, it's listed here as a carb for a car. The number is the important thing just so you get the correct kit.

Attached Files
Rochester-B-&-BC-Carburetors.pdf (155.34 KB, 18 downloads)

Gord
----
1954 1/2 ton 235 4 speed
Re: Rochester carb ??
Gord&Fran #1408174 Sat May 01 2021 12:36 PM
Joined: Nov 2002
Posts: 2,282
C
Carburetion specialist
Originally Posted by Gord&Fran
From:
https://www.thecarburetorshop.com/Kchevrolet1.htm

1958 6 235 S/T Rochester BC 7012127 2639

The "2639" in the post above is the number of the rebuilding kit.

Jon.


Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify
If you truly believe "one size fits all" try walking a mile in your spouse's shoes!
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