Dude I work at Just Brakes, I can walk you through any brake, suspension and steering problem.
They are right that a new caliper would be "Best" because of the warranty, but I'm pretty sure I could teach a retarded monkey how to rebuild one
here's my method..(air compressor) (no compressor explained below
1)!!!!!CHECK BLEEDER VALVES!!!!! If they do not open, replace caliper with new or reman
Remove hose from caliper and let drip in a pan, remove lower caliper bolt and swing caliper up and remove from arbor.
Take caliper to a table,drain, and shove a rag against the piston for cushioning), place a rag over the caliper like a blanket ( to catch brake fluid as it sprays out) Place blow nozzle in banjo bolt hole and blow air into caliper,if caliper has muliple pistons...remove boot and seal from first piston that comes out, place that piston back into bore and hold into bore with large channel locks while remove other piston/s
remove boot from caliper piston bore if still in there, there are 3 styles of boots ( soft, soft with retainer ring, hard) this refers to the edge on the boot that connects to the caliper,the other end is always soft, hard boots and soft with retainer ring require a screw driver and a flick of the wrist to remove.
Pick the square cut seal out, then clean the bore with light sandpaper (1000grit) that is moist with the proper brake fluid, rinse in sink and return to table
The style of dust boot determines the method used to replace the piston.
blow caliper dry, (((with clean hands!!)) place the new square-cut seal in it's seat, put assembly fluid or brake fluid on finger and lube the seal and piston (either cleaned stainless piston or NEW phenolic)(phenolic pistons must be replaced)..
Hard Boot replacement
slide dust boot around piston outter edge, wiggle the piston into the bore, use finger tips to pull the piston into the bore. (Never hammer the piston into the bore) use seal install still kit to hammer hard rim dust boot into it's seat..or a wide blade screw driver works if you're careful
soft boot with retainer ring
place boot over lubed piston, pull piston into bore,use small screw driver to push soft edge into caliper boot seat, install retainer ring
soft boot (no retainer ring)
place caliper edge of dust boot into caliper dust boot seat, fold rag into half twice and lay over the edge of caliper where the inner pads outter side touches (thus helps to keep from pinching your fingers) place ring finger and middle finger into piston opening and place piston over boot opening, with blower, blow air into banjo bolt hole (like when removing piston) as you push piston into dust boot the boot will inflate like a ballon, with proper angle of piston, air pressure, and you pushing the piston into boot, it'll blow the boot edge around the piston, then slide piston down into bore
ALWAYS replace the copper gaskets on the banjo bolt, one on both sides of the hose fitting!
Tighten banjo bolt by hand until snug,do not use impacts,remember...it's hollow
add new brake fluid to master cylinder, open bleeder valve until it drips clear brake fluid. Brake Fluid should be flushed every 2 years
