Jarl's suggested cause of your A brake problems makes a lot of sense. If,
after checking for this, you still have the problem, I would move on to
check the following:
I have had that problem in the past on non-lbc's after I set the brakes too
tight. My experience supports what you say about things expanding as they
get hot. The MGA has double leading shoes on the front, if I remember
correctly. This settup was not very common on American cars so if you had
your brakes done at a non-LBC specialist, they may not be adusted correclt.
In the back there is a square head screw protruding from the backing
plate. Turning this screw counter-clockwise increases clearance for the
brake shoes. I have never done MGA front drums but I would guess that they
would have two of these screws- one for each shoe.
I have also heard that A brake hoses rot from the inside. Little furballs
break off and act like check valves in the brake system. The DPO of my A
had that problem and he replaced the disk, pads, and caliper before the
real problem was found. The he only replaced the bad hose. As a
precaution, I am planning on replacing the rest of the hoses this Spring.
Good Luck
Bill Eastman
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