What you describe is a normal wear process common to mg's and other
vehicles. I cannot understand how it happens in three months, though.
Normally, I replace the pin - you can get a suitable replacement at a
hardware store - and have the hole welded up and re-drilled.
From: Nina Barton <firstname.lastname@example.org>
To: email@example.com <firstname.lastname@example.org>
Date: Sunday, April 11, 1999 10:19 AM
Subject: brake pedals and ovaling of holes
>Since my newly replaced master cylinder was leaky, I have removed it to
>replace with a new unit. I notice that the push rod and the brake pedal
>are ever so slightly ovaled, which wasn't true when I replaced the unit 3
>months ago. Why does this happen, and what should I do to avoid it in the
>future? I did look in the List Quest archives, but was not real successful
>in finding an answer. Thanks in advance, Nina