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Username Post: Rochester B Carb question        (Topic#356832)
carolina chevrolet 
Poster
Posts: 22

Reg: 11-12-18
06-15-19 04:10 PM - Post#2768520    

I am having trouble a Rochester B Carb, can't get gas to spray into the throat. New rebuild kit, float bowl is nearly full of gas but the bowl gasket is covering the little T , spring and check ball. Is the gasket suppose to cover that up ? I can't see how gas suppose to get from the accelerator pump into the carb body. With the carb separated and gasket removed I can work the pump and see gas squirt up by the ball, spring and tee. The kit came with 2 gaskets and they both cover the tee.



 




2blu52 
"18th Year" Silver Supporting Member
Posts: 18892
2blu52
Age: 86
Loc: Montana
Reg: 03-12-02
06-15-19 04:48 PM - Post#2768521    
    In response to carolina chevrolet

Most rebuild kits have two bowl gaskets in them, one for the manual choke and one for the automatic choke. the More open gasket is the one that fits the B, the closed one is for the BC. If the wrong one is used then the problem you describe can occur. I would post a picture of the correct gasket but after nearly 20 years on this format I still have not mastered that.

"PEACE IS THAT GLORIUS MOMENT IN HISTORY WHEN EVERY ONE STANDS AROUND RELOADING"

THOMAS JEFFERSON


 
drew1987 32
"6th Year" Silver Supporting Member
Posts: 3172
drew1987
Age: 32
Loc: Rochester, New York
Reg: 02-23-14
06-16-19 05:46 AM - Post#2768540    
    In response to carolina chevrolet

This exploded view shows a couple holes in the gasket where the accelerator pump is. Hope this helps

You might also temporarily assemble with no gasket and see if it changes. Obviously it will leak so I don’t mean install it.

Assuming there are holes on the bottom and top halves, there most likely should be in the gasket as well

Attachment: 6BE725F0-53D6-4CFA-A521-21DA074873F4.jpeg (157.19 KB) 12 View(s)




Andrew D. Carapella (Drew)

'50 Deluxe 4dr v8 auto

Member:

Rochester Street Rods - Est. 1970
http://www.rochesterstreetrods.org

CrossMembers Car Club - Hebrews 12:2
http://www.crossmemberscc.com


Edited by drew1987 on 06-16-19 05:47 AM. Reason for edit: No reason given.

 
carolina chevrolet 
Poster
Posts: 22

Reg: 11-12-18
06-16-19 06:29 AM - Post#2768543    
    In response to drew1987

Evidently gas is not suppose to come up, but go down. There is no hole in the bowl cover to match the hole where the tee, spring and ball are. Still can't gas to make it thru the carb.



 
40grit 
Contributor
Posts: 511
40grit
Age: 73
Loc: Chattanooga, Tn
Reg: 07-08-13
06-16-19 06:42 AM - Post#2768544    
    In response to carolina chevrolet

If the ball has fallen out, not been installed, or is the wrong size the accelerator pump will not work.

It certainly is possible for the passage to be blocked preventing the fuel to flow through the accelerator circuit also.

John

Just Slightly Abrasive


Edited by 40grit on 06-16-19 06:44 AM. Reason for edit: No reason given.

 
carolina chevrolet 
Poster
Posts: 22

Reg: 11-12-18
06-16-19 07:43 AM - Post#2768550    
    In response to 40grit


"It certainly is possible for the passage to be blocked preventing the fuel to flow through the accelerator circuit also."
That's what I am now thinking. It has a new ball and spring, installed correctly and will squirt a stream of gas about a foot high when the pump is worked by hand with the cover off the float bowl.



 
2blu52 
"18th Year" Silver Supporting Member
Posts: 18892
2blu52
Age: 86
Loc: Montana
Reg: 03-12-02
06-16-19 08:34 AM - Post#2768558    
    In response to carolina chevrolet

Is the exterior pump link properly assembled. Also there are two larger balls in a kit one is steel the other is aluminum the steel ball fits in the pump discharge, check the shop manual for that location. The diagram provided by Drew is for the BC model not the manual choke.

"PEACE IS THAT GLORIUS MOMENT IN HISTORY WHEN EVERY ONE STANDS AROUND RELOADING"

THOMAS JEFFERSON


Edited by 2blu52 on 06-16-19 08:35 AM. Reason for edit: No reason given.

 
carolina chevrolet 
Poster
Posts: 22

Reg: 11-12-18
06-16-19 06:38 PM - Post#2768608    
    In response to 2blu52

Problem solved. Turns out that the little tee (35)that holds the spring (36)and ball(37)in place was turned 90 degrees from where it should have been. It was blocking the passage. I got to hear my '53 Belair run for the first time this evening.



Edited by carolina chevrolet on 06-16-19 06:39 PM. Reason for edit: No reason given.

 
drew1987 32
"6th Year" Silver Supporting Member
Posts: 3172
drew1987
Age: 32
Loc: Rochester, New York
Reg: 02-23-14
06-17-19 04:45 AM - Post#2768630    
    In response to carolina chevrolet

Awesome! That’s what it’s all about!!

Andrew D. Carapella (Drew)

'50 Deluxe 4dr v8 auto

Member:

Rochester Street Rods - Est. 1970
http://www.rochesterstreetrods.org

CrossMembers Car Club - Hebrews 12:2
http://www.crossmemberscc.com


 
Dean50 
"13th Year" Gold Supporting Member
Posts: 1364
Dean50
Loc: Detroit area
Reg: 01-02-07
06-20-19 04:15 AM - Post#2768868    
    In response to carolina chevrolet

Congrats on figuring that out!

Dean50



 
KoraB 
Poster
Posts: 29

Age: 63
Loc: Salt Lake City, Utah
Reg: 06-21-19
06-21-19 08:27 PM - Post#2768963    
    In response to carolina chevrolet

Mikes Carbureter on utube has vids and all the parts as well as rebuild kits for Rod. B carbs. Does it all, they are the best.


MB in SLC, UT.


 
drew1987 32
"6th Year" Silver Supporting Member
Posts: 3172
drew1987
Age: 32
Loc: Rochester, New York
Reg: 02-23-14
06-22-19 05:31 AM - Post#2768971    
    In response to KoraB

  • KoraB Said:
Mikes Carbureter on utube has vids and all the parts as well as rebuild kits for Rod. B carbs. Does it all, they are the best.





I destroyed a little barrel shaped spring some years ago. Mike sent a couple new ones very inexpensively and quite promptly. Great guy

Andrew D. Carapella (Drew)

'50 Deluxe 4dr v8 auto

Member:

Rochester Street Rods - Est. 1970
http://www.rochesterstreetrods.org

CrossMembers Car Club - Hebrews 12:2
http://www.crossmemberscc.com


 




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