Matt, The master cylinder is divided, with one section for front brakes and
the other for rear. It is unlikely that the MC is related to this. More
likely is that the brake hose or the brake calliper piston is causing the
problem. That you were able to relieve it when you prised the piston back
shows that the problem is on one side. Brake hoses fail internally while
appearing on the outside to be perfect. I would suggest that if you are
uncertain of their age, or if you know that they are over ten years of age, to
replace all three of them, and the clutch hose as well. It may, of course, be
the piston, but old hoses are eventually going to cause you concern. If you
remove the pads on the affected wheel, you can gently squeeze out the piston.
Have a look at its outside diameter. If pitted or rusty, it may be sticking
and causing the problem. You may be able to polish it so that it does not
stick any more, but for the effort involved, I think replacing them is the way
to go. Brake parts for MGB are not expensive, so replacing anything that
could be at fault is not wasted effort.Bob
---------- Original Message ----------
From: Matthew Milkevitch <firstname.lastname@example.org>
To: "email@example.com" <firstname.lastname@example.org>
Subject: [Mgs] Brake Caliper Problem
Date: Sun, 27 Jul 2014 10:56:01 -0700
I have been working on my '74 MGB-GT lately, and I noticed that
the front wheels don't rotate the same. The LH side rotates more freely than
the RH side.
this was a sticking brake caliper, I replaced both
flexible lines and pads (along with the discs).
doing this work, things
are a little improved but the wheels still don't
rotate the same. You
can hear the RH side scraping when the wheel turns.
When you pull the
pads out of the RH side and push the caliper piston in a
re-install the pads, the wheel turns freely like the LH side.
push in the brake pedal in, however, the condition returns.
knowledge, the wheel bearings are correctly adjusted (outer nut to 60 ft/lbs,
the hub turns freely with no "clunk."
advice on where to check next? Do
you think this is an issue with the
master cylinder or the hard brake line to
that caliper perhaps?
Thanks for any help,
Maple Glen, PA