Question about 2001 Volvo S40

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Frozen rear caliper

In July purchased an 01 Volvo S40. The dealership replaced the rear rotors and pads, among other work, to get it sale-able. I had it 2 months when the rear rotors and pads had to be replaced, along with the right rear caliper. I was told the caliper had "frozen". It wore down the pad to metal and damaged the rotor. Can you tell me what would cause the caliper to freeze up. Or is it possible something was done incorrectly when the brakes were replaced?

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Usually a bad bearing will cause a bad angle/pressure on the pad which causes caliper to get uneven pressure on piston. causing a freeze. other thing is bad alignment due to bad bushings on the control arms.

Posted on Oct 10, 2008

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  1. To retract the caliper piston into the caliper bore use a spanner type wrench to turn the piston. You can also rent the correct tool from a local parts store or you may use a pair of channel lock pliers and apply slight pressure with a C clamp. You must be very careful not to damage rubber boot or piston. Turn the piston clockwise until it bottoms out fully in the caliper.
  2. Align the cutouts in the caliper piston to the alignment pins on the back of the brake pads.
Watch this quick video for help. http://www.professionalfleet.com/videos/view/10-replace-rear-disc-brakes

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They are likely not frozen, they are a different kind of caliper that is used for the park brake as well. To compress them you need a special tool that rotates the piston while compressing it. You may be able to get one rented from AutoZone, they dont show it on their website but they seem to have more in the store than they show online.

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u need to open the pads wide enough to put it back
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