if you remove the rear brake pads, you should see some notches on the piston. there's a tool you can use to screw the piston into the caliper or you can use some pliers but be careful not to slip and damage the piston seal and boot.
You can use large Channel-lock pliers if the piston is way out, then switch over to long-nose pliers that fit into the notches on the piston. Gently turn the piston back in clockwise while making sure the piston seal doesn't get twisted up or damaged. Keep an eye on the master cylinder so that it doesn't overflow.
KA-T for life, yo!
Last edited by rogoman; Oct 4th, 2011 at 10:53 PM.
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