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CARB FLOAT BOWL SHIMMING ???

Posted by 67mgbrich

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CARB FLOAT BOWL SHIMMING ??? #1
67mgbrich Rich Creedon California, USA 1967 MG MGB 1967 MG MGB GT Special	Posted: October 17, 2011 03:09PM Registered: 5 years ago Posts: 57

I am reassembling the carbs from '53 TD....My question is regarding the 3 washers ( 2 red fiber and 1 brass shim )kit for the banjo bolt that secures the float bowl to the carb body. These 3 washer kit ( moss pn # 370-700 )...do I use all 3 with the brass shim in the middle of the stack ?? Thanks for any input !!! Rich

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Re: CARB FLOAT BOWL SHIMMING ??? #2
Mr. Barry Edward Wesson Hiawassee, Georgia, USA	Posted: October 18, 2011 04:20PM Registered: 3 years ago Posts: 1,866

I believe that the two hard-fiber washers go on either side of the banjo fitting, and the brass washer, goes under the bolt head, to protect the fiber washer, and allow turning of the bolt, without damage to the fiber washer.
Pressure deforms (slightly), the fiber, and acts as a seal.
Edward

"It's not a car....It's a CAREER!"

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Re: CARB FLOAT BOWL SHIMMING ??? #3
ddubois Dave DuBois Bremerton, WA, USA	Posted: October 18, 2011 09:32PM Registered: 7 years ago Posts: 4,290

If you look at the Moss catalog, all three washers go between the head of the banjo bolt and the arm of the float bowl. There is a separate fiber washer that goes between the float bowl arm and the carburetor body. I suspect that the brass washer goes between the two fiber washers on the bottom side of the float bowl arm, but I am not 100% sure of that. It should have something on this in the shop manual.
Cheers,

Dave DuBois
1953 MGTD
1966 MGB
http://homepages.donobi.net/sufuelpumps/

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Re: CARB FLOAT BOWL SHIMMING ??? #4
67mgbrich Rich Creedon California, USA 1967 MG MGB 1967 MG MGB GT Special	Posted: October 19, 2011 09:11AM Registered: 5 years ago Posts: 57

Dave,
You are correct there is a separate waher that goes ontop ( the new one I got is aluminum ). I think you are correct about the arrangement. I couldn't find anything in the manual on my first go round...but sometimes my eyes don't work as I wish they would...will try again. Really can't figure the purpose however..shimming distance ? or torqueing resistence ?? Anyhow really appreciate your input !!!!!!! Thanks Rich

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Re: CARB FLOAT BOWL SHIMMING ??? #5
Mr. Barry Edward Wesson Hiawassee, Georgia, USA	Posted: October 19, 2011 11:58AM Registered: 3 years ago Posts: 1,866

OOPS!
Just realized that I was looking at the wrong banjo bolt....Someday , I will learn to read the question, before I jump in and say something stupid. confused smiley

"It's not a car....It's a CAREER!"

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Re: CARB FLOAT BOWL SHIMMING ??? #6
67mgbrich Rich Creedon California, USA 1967 MG MGB 1967 MG MGB GT Special	Posted: October 30, 2011 05:39PM Registered: 5 years ago Posts: 57

Spoke to Kelvin Dodd at Moss Techline this week and he confirmed that the 2 red fibre washer do indeed sandwich the brass shim. He wasn't totally sure why, but thought it was to protect against washers distorting during tightening.

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