Quote:
Originally Posted by docfeelgood
What is the best way to handle a ceased piston on the a front brake caliper?
I'm trying to fit new pads into the caliper, but the inner brake piston will absolutely just not budge. The other 3, no problem.
Any ideas?
2004 4Runner SR5, w/ apprx. 74,000 miles
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If the piston is stuck, you are either going to have to replace or rebuild the caliper. If you free the stuck piston, it is likely to become stuck again. The caliper pistons usually get stuck because of corrosion or contaminants that form on the piston/caliper bore, or the inner seal becomes distorted.
To try and free the piston, remove the brake pads and unbolt the caliper from its mount. Support the caliper and DON'T let it hang by the brake line. Place one old brake pad or small block of wood against the piston and use a small C-Clamp to apply pressure to push the piston back in its bore. I have not done this procedure on 4Runner calipers, but have used this method on other vehicles with success.