rear brake caliper

[George Nimmer]

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A few questions about my '84 4kq rear brake calipers:

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?

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?

TIA
George

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George Nimmer <george164(at)earthlink.net>
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