In a message dated 5/29/2001 3:53:29 PM, wiencek@anl.gov writes:
<< Here is a tech tip on how to extract seized brake caliper pistons.
When rebuilding the brake calipers on older cars, it can be very difficult
to get a seized piston out of the caliper, especially without damaging the
piston or bore. Mechanics sometimes use air pressure to free the piston, but
this can be dangerous because the piston can eject with a lot of force and
speed. A much safer and very effective solution is to use a common grease
gun. After removing the caliper, screw a standard grease fitting into the
brake line hole. Make sure that the bleed valve is closed, then attach your
grease gun to the fitting and start pumping. Even the toughest pistons will
pop out. I always wrap a rag around the whole caliper beforehand, as this
helps to keep any small bits of grease from flying out. The high viscosity
of the grease causes the piston to eject very slowly.
>>
I was faced with this problem and talked to Rick at SS. He told me to find a
good piece of concrete and drop the caliper on to it. I thought, that's crazy
man. PERFECT, I'm a little crazy, so why not. WORKED LIKE A CHARM. Didn't
damage a thing and they both popped out.
Tom's way, I am sure, is easier on the concrete and the caliper.
ZAG
|