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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Re: Frozen rear caliper
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.
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brakes are brakes, push in , turn in, or two piece calipers. remove wheel , remove two bolts that hold caliper in place, remove replace pads if rotors look good if not remove caliper retainer and rotor replace or have resurfaced at local part store with service. if push in piston push in with c-clamp or piston tool, if turn in will be solid on top with slots for tool to turn in turn to right, tool can be gotten at parts store, if two piece take apart and put back then bleed brakes.
If they order the parts from rockauto its about $630-700 in parts. $50-60 front and rear brake pads, $ 100 -115 2 better front rotors, $100 for better rear rotors, $90 for each rear caliper, 100-125 per front caliper, $10 for each rubber brake line. (The caliper prices include a core fee that you would get back $30-40 per caliper returning the old caliper, but you pay the shipping fees). The ballpark prices also include the additional shipping costs. Labor should be around 2-2.5hrs. So depending on the shop it would be $50-60/hr so total cost $100-150 for the labor. So total would be somewhere around $730-850.
You can just have the one caliper replaced, you do not need to replace them all. I would get new rotors on whichever axle (front or rear) the stuck caliper is on and not get the rotors cut, because the faulty caliper could have warped the rotor.
Another possibility is that it could just need a new rubber brake line. When my calipers locked on one of my classic trucks, I just replaced the old rubber line and it was good to go.
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.
Align the cutouts in the caliper piston to the alignment pins on the back of the brake pads.
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.
your inside pad wore out first do to a bad caliper or frozen slide or brake hose.remove brake hose off the caliper and see if you can turn the wheel.if you can replace hose and bleed caliper.if wheel still doesn't move buy a loaded caliper,this will come also with new slides!and then bleed