having a problem depressing rear brake piston

blue6er99 · June 17th, 2006, 03:49 AM

i decided to change my brakes today and am having a problem pushing the piston on the rear calipers back in to make room for the new pads. on the front i just used a C-clamp but in the back nothing seems to work. ive tried using the clamp while opening the bleeder valve but that wouldn't work either. my car is a 99 V6. Does anybody have an idea what the problem could be.

Twist 2 Go · June 17th, 2006, 07:29 AM

the pistons have to be screwed in due to the caliper also fubctioning as a parking brake. they make a tool for this that you should be able to pick up at most auto parts stores or in a pinch, needle nose pliers or vice grips will work. you will see 2 notches in the piston, the tool goes into those and then the piston is screwed clockwise into the caliper and when you get it back far enough for the pads to fit over the rotor, one of the notches needs to be facing the bottom of the caliper. There is a little nipple on the pad that fits in there

99mustang232 · June 17th, 2006, 11:19 AM

just be really careful with pliers as it is easy to gouge the caliper piston

blue6er99 · June 17th, 2006, 03:27 PM

ok so i just tried to screw the piston back in and it only worked on the passenger side so im thinking its the parking brake holding the driver side piston out. my parking brake is fully disengaged though so i have no idea how to fix it.

Twist 2 Go · June 18th, 2006, 12:34 PM

try putting some pressure inward on the piston while screwing it in. Sometimes they can be a real bear.

blue6er99 · June 19th, 2006, 08:12 PM

ok finnaly got it to work. thanks for the help

June 17th, 2006, 03:49 AM	#1
blue6er99 Regular Join Date: Mar 2006 Location: Mesa, AZ Posts: 52 iTrader: 0 reviews	having a problem depressing rear brake piston i decided to change my brakes today and am having a problem pushing the piston on the rear calipers back in to make room for the new pads. on the front i just used a C-clamp but in the back nothing seems to work. ive tried using the clamp while opening the bleeder valve but that wouldn't work either. my car is a 99 V6. Does anybody have an idea what the problem could be.

June 17th, 2006, 07:29 AM	#2
Twist 2 Go Hardcore Enthusiast Join Date: Aug 2005 Location: Chesapeake, Virginia Posts: 1,716 iTrader: 0 reviews	the pistons have to be screwed in due to the caliper also fubctioning as a parking brake. they make a tool for this that you should be able to pick up at most auto parts stores or in a pinch, needle nose pliers or vice grips will work. you will see 2 notches in the piston, the tool goes into those and then the piston is screwed clockwise into the caliper and when you get it back far enough for the pads to fit over the rotor, one of the notches needs to be facing the bottom of the caliper. There is a little nipple on the pad that fits in there __________________ 88 Mustang Coupe 2006 FFW Richmond True Street Runner-Up www.rickscarcare.net

June 17th, 2006, 11:19 AM	#3
99mustang232 MM Fanatic 1999 Ford Mustang V6 Join Date: Sep 2005 Location: newport news, va Posts: 3,745 iTrader: 0 reviews	just be really careful with pliers as it is easy to gouge the caliper piston __________________ ...even fire and single cammin 1986 Ford F-150 5.0L 2WD 1994 Toyota Pickup 2.4L 4WD 1999 Ford Mustang 3.8L V6 2002 Jeep Grand Cherokee 4.0L 2WD 2008 GMC Sierra Denali 6.2L AWD

June 18th, 2006, 12:34 PM	#5
Twist 2 Go Hardcore Enthusiast Join Date: Aug 2005 Location: Chesapeake, Virginia Posts: 1,716 iTrader: 0 reviews	try putting some pressure inward on the piston while screwing it in. Sometimes they can be a real bear. __________________ 88 Mustang Coupe 2006 FFW Richmond True Street Runner-Up www.rickscarcare.net

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June 17th, 2006, 03:27 PM	#4
blue6er99 Regular Join Date: Mar 2006 Location: Mesa, AZ Posts: 52 iTrader: 0 reviews	ok so i just tried to screw the piston back in and it only worked on the passenger side so im thinking its the parking brake holding the driver side piston out. my parking brake is fully disengaged though so i have no idea how to fix it.

June 19th, 2006, 08:12 PM	#6
blue6er99 Regular Join Date: Mar 2006 Location: Mesa, AZ Posts: 52 iTrader: 0 reviews	ok finnaly got it to work. thanks for the help

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