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RBnDFW

On 10/13/2010 4:41 PM, wrote:
On Wed, 13 Oct 2010 10:08:13 -0500,
wrote:

On 10/13/2010 7:07 AM, Stormin Mormon wrote:
Living in the Rochester, NY area. Vehicles rust, and
parts are dificult to remove. The threaded pins for
GM front brakes are often miserable to remove. The
threads are dificult to get to, and tend to rust and lock
up.

What's some of the ways to prevent the rust? And what
are some ways to remove rusted ones?

In the last day or two, I've been helping work on a friend's
car. The T-50 socket tip removed one pin. A metric allen
wrench removed another. And vise grips for yet another.

I cleaned out the threads with a wire brush, and put some
silver Never-Sieze in. He put a dab of neversieze on the
T-50 socket end of the pin, to help keep it from rusting.

Anything else we could have done?

There are silicone caps that will fit over those socket heads. Fill with
hi-temp grease first.

Problem with calipers is most of the usual anti-rust treatments won't
hold up to the heat. You can help that a bit by using pad shims on the
backing plates, and by making sure the caliper piston boots are
relatively new. The boots have enough spring to them that they help pull
the piston back away from the caliper, so less heat is generated while
just driving. Old boots let the pads brush the rotor all the time and
they run hotter.

The boots generally do NOTHING to pull back the pads. That's the job
of the square "O" ring seals in the caliper.

You are correct,it's the seals, not the boot. There are a few rare
exceptions.

--
I can see November from my front porch