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I changed the rear brake pads on my 2002 Elantra and the caliper pistons would not retract to fit over the pads. After 11 years of weather exposure the pistons were frozen. I removed the calipers, soaked the pistons with WD-40 and penetrating oil and heated the housing with a hair dryer. Doing this periodically for a day I got the pistons to break free. I removed the pistons for inspection and they were severly corroded. I ordered two rebuilding kits on line which included all seals and pistons. ($58.00) My question if anyone can help-
The pistons are threaded and screw into a threaded rod inside the housing. Should I thread the pistons in until they bottom out, or should I turn them out until they touch the inner break pad??

Thanks - Joe12248
 

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You did really well with the original calipers, most people aren't that lucky.

Leave enough room so caliper just slides over the pads; make sure the inboard pads two small raised bumps are lined up with two of the notches in the piston face.

Make sure parking brake cables not seized up.
 
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