rear brake caliper

[George Harris]

George Nimmer wrote:
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> A few questions about my '84 4kq rear brake calipers:
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> I have the lisle brake piston tool that "screws" the piston back into
> the caliper.  There are different "bits" included that fit different
> pistons.  The pistons on my car are perfectly flat and have no dimples
> that these keyed "bits" will fit.  The pistons only have a six-sided
> hole in the center.  How do I push these pistons back into the
> calipers?  Which direction (clockwise or counterclockwise) do they turn
> while being "screwed" back in?

I used a 'C' clamp on my caliper pistons. Turning the handle on the
clamp with the swivel head of the screw part of the clamp acting against
the caliper gave enough clockwise turning force to turn the calipers
back in.

> The Left Rear caliper doesn't seem to be working.  The disc is all
> rusty.  When the car is off the ground on four jackstands, and someone
> pushes the brake pedal, the Left Rear wheel can be turned easily by
> hand.  Do I have a bad caliper?

I can't imagine a caliper being seized that bad unless it was sitting
for a while and rusting. What about the proportioning valve. Can you
test it by bleeding to find out if fluid is even being sent there?

> TIA
> George
>
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> George Nimmer <george164(at)earthlink.net>
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