How does the right rear brake caliper piston retract back into the caliper? it is the emergency brake cable side. does it push back in or do you have to screw it back in?
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you should'nt have any tension on the parking brake,unless it's on. check the parking brake to insure that it's in the off position. chock" the rear wheels,to make sure the car does'nt roll while you're jacking it up and "always use jackstands,do not trust your jack" does your brake caliper piston have a + on it?it will be on the brake caliper piston itself, if so,then you need to back the brake caliper piston back in by turning it counterclockwise,auto parts stores sell a special tool to back the brake calipers back into place, i've always used a straight screwdriver,to turn the piston counterclockwise some do turn clockwise though to retract the brake piston. a simple call to the auto parts store where you're purchasing the brakes will tell you which way the piston will need to be retracted.other wise,it's a simple brake replacement,just push the brake caliper cylinder with a "C" clamp to retract the brake caliper, also,if you are replacing brake rotors,purchase the brake kleen to spray on the new brake rotors when you replace those.they have a clear film on them,you'll need to remove that film to insure no future issues with the brake rotors.simply spray the front and back of the brake rotors with this spray to remove the protective "film"and as always,thank you,for choosing fixya.com!
You have to compress the caliper. If your design uses the brake pads as parking break, you need to rotate the piston while compressing it. there are tools that assist with this, but I use a C clamp and the old brake pad.
Notice the Two holes on the caliper piston face? They receive the pins of a special tool that turns and presses in at the same time to collapse the piston. You may be able to approximate the effect with a pair of needle nose pliers or such and turn & press in. The right tool works best.
You will probably not need anything other than a metric socket wrench set.
Many Toyota models have disc brake calipers that will flip up or down when you remove one of the two bolts that hold the calipers on. I am not sure of the setup on the Sienna.
When you remove either the upper or lower bolt and move the caliper, you can then remove the old pads. Also, you will need to push the piston(s) back into their cylinders to give you enough space to install the new pads. A large C clamp will usually suffice to push in the pistons.
I assume that you are talking about the front (disc) brakes. Some autos still have drum brakes on the rear, and those are a different story. They require several specialty tools to remove and replace the shoes.
Proper size wrenches and a large C-clamp to push piston back into the caliper is only tools for the front, but back disk brakes require special tool to TURN the piston as it is pushed back into caliper to reset emergency brake. This tool can often be borrowed from Auto parts store or purchased from Harbor Freight http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=40732 for about $20. Don't try to service rear disks without the tool, Calipers can be broken if not retracted properly!
Is this the ratcheting style caliper? If so, you really should be using the proper tool to turn these style calipers back into their bore, and both calipers should turn clockwise to retract them back in. Also, if the piston was too far out you may have a hard time getting it to go back in. Hope this helps.
caliper tends to have more pressure than rest of brake system
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