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Best way to compress pistons when replacing pads?

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Old 04-21-2007, 02:11 PM
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Default Best way to compress pistons when replacing pads?

I am changing my brake pads and having a hard time getting the caliper over the new pads, any advice for an easy way to compress the pistons to get the caliper back on? Thanks....
Old 04-21-2007, 02:22 PM
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C clamps work good.
Old 04-21-2007, 02:22 PM
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I used a c-clamp and the old brake pad to compress the pistons. It may help to drain some of the brake fluid from the master cylinder as well.
Old 04-21-2007, 02:23 PM
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get a crowbar or something like it and wedge it in between the caliper pistons and rotor (with the caliper on it but loose) and just try and pry em shut. but if they're not budging you're calipers are no good. go to autozone or somewhere in this case and get some stock replacements (core exchange) and replace them.

if they won't compress it's because you may have been driving around with expired brake pads for too long and pistons in the caliper had no leverage to compress so it just kept pushing outwards and probably got welded shut from all the heat from braking.

just replaced mine a few days ago.
Old 04-21-2007, 02:23 PM
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+1 c-clamp.
Old 04-21-2007, 02:27 PM
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Originally Posted by kaos_
get a crowbar or something like it and wedge it in between the caliper pistons and rotor (with the caliper on it but loose) and just try and pry em shut. but if they're not budging you're calipers are no good. go to autozone or somewhere in this case and get some stock replacements (core exchange) and replace them.

if they won't compress it's because you may have been driving around with expired brake pads for too long and pistons in the caliper had no leverage to compress so it just kept pushing outwards and probably got welded shut from all the heat from braking.

just replaced mine a few days ago.
how much does it cost when you exchange them and get new ones? I will try a c-clamp first but my pads were pretty worn down......
Old 04-21-2007, 02:57 PM
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Originally Posted by mulletwearingtadrive
how much does it cost when you exchange them and get new ones? I will try a c-clamp first but my pads were pretty worn down......
I use a clamp and crack the bleeder while I'm compressing it. Be sure to close the bleeder as you stop compressing.

It is a bad idea to push the fluid up the line. It can have moisture or gunk in it. Especially with ABS.
Old 04-21-2007, 03:04 PM
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C clamp will do it. I have had them worn down also that should not affect it unless it rusty and dirty.
Old 04-21-2007, 03:32 PM
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i got a tool from checker that made it very easy.....


do i need to bleed them when replacing the pads?
Old 04-21-2007, 03:43 PM
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i have always used the C clamp method. just go VERY VERY slow. How many miles since the last time they were bled? its really simple so if you have the time and fluid just go for it.
Old 04-21-2007, 03:51 PM
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I have always C-clamped those bitches
Old 04-21-2007, 04:23 PM
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i think new calipers from autozone are like $40 a piece. bring in your old ones and they just exchange them out i think for free.
Old 04-21-2007, 04:29 PM
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I got the pads on and the calipers back on, took it for a spin around the block....when i brake hard it doesn't stop as quickly and there is a strange noise, not really a grinding but its hard to describe. Should I bleed them?
Old 04-21-2007, 05:52 PM
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Ugh I am an idiot, made a mistake.....fixed it and the car seems to sound and brake fine. I guess if I am still alive in a few days than I will know I did a decent job lol
Old 04-21-2007, 08:12 PM
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uh.. giant channel grips are generally what everyone at our shop uses
Old 04-21-2007, 09:09 PM
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I picked up this really nice little tool that you use to press the old brake pad against the pistons.....after I got that(for less than nine bucks), the install went very smoothly and quickly, except for my brief moment of stupidity, lol.
Old 04-22-2007, 06:05 AM
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c clamp and very very slow
Old 04-22-2007, 01:10 PM
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long Screwdriver - Have never had a problem.



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