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More SU problems

To: "'mgs@autox.team.net'" <mgs@autox.team.net>
Subject: More SU problems
From: "Phillips, Frank" <fwp@ufl.edu>
Date: Mon, 7 Aug 2000 08:35:24 -0400
Listers,

First, thanks to all who helped with advice this weekend. Unfortunately the
answer to my float bowl flooding problem came to me in the middle of the
night and Sunday I corrected the problem. It was my own stupidity (that I
don't know how to correct <g>). I had placed the float needles in backwards!
My 68B had Grose Jets and I was replacing them with standard jets and I'm a
newbie, that will never happen again...

Now the current problem! My rear piston is sticking. When I use the lifting
pin or a small screwdriver to raise the piston (as in tuning the carbs) the
piston has an initial point of resistance that must be overcome to rise.
According to Haynes I should use metal polish to clean the area causing the
sticking. I have two questions:

1) How do I determine the spot that is causing the problem or should I
simply make the whole piston and chamber insides shine?

2) As I rebuilt the carbs I had to center the jets, could poor centering
cause the problem? In other words, is it possible that the piston is sitting
at an angle and thus does not rise correctly in relation to the chamber?
Could this be tested by fitting the piston without the needle and lifting it
or would the absence of the needle cause the same condition?

One last idea... I also have a set of 69 carbs and the piston bodies are
both stamped AUC-1331 but the needle holding area is different, one is fixed
one has a spring. Is it possible to adapt these?

Thanks for all the help. I can't wait to get my B back on the road!!!

Frank Phillips
Email: fwp@ufl.edu
1968 MGB - http://plaza.ufl.edu/fwp/mgb.htm



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