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question about tool for pistons on changing brake pads..

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Old Aug 29, 2005 | 07:28 PM
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question about tool for pistons on changing brake pads..

hey guys...i was trying to change my brake pads...but when i took them out...there are two pistons...one on each side...i was wondering what kind of tool can u buy to push the pistons back in..because a C-clamp would just push one in and the other will come out since its pressurized...i need to know what kinda tools you guys use for the pistons..thanks for any help...
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Old Aug 29, 2005 | 07:32 PM
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i used 2 C Clamps......and on the front , used a piece of wood under them, since there are 2 on each side. Just make sure you put something under the other end of the c-clamp so it doesnt scratch or chip the paint on the Brembo's
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Old Aug 30, 2005 | 07:01 AM
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I don't use any tools, I use the pads.

Leave one pad in, take the other pad out 1/2 way. Then push the pad sideways as to push the pistons in with the pad edge (using it like a lever pivoting on the disk rotor). Once pistons are in, insert new pad. Sometimes you may turn the pad 90deg so you have more of the pad on your hand for leverage. Use work gloves too! It takes me about 10 secs each side to push the 2 pistons back in. You never touch the calipers this way to do any damage.

If you want to re-use the pads you are taking out, then you may not want to do it my way as the pad meterial may get damaged when leveraging on the disk rotor...but you can just keep one old pad around for piston pushing...
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Old Aug 30, 2005 | 07:08 AM
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From: aptos,ca
wide flat head screwdriver but use it gently
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Old Aug 30, 2005 | 08:15 AM
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thanks guys.
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Old Aug 30, 2005 | 01:18 PM
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guys..now im doing the front brake pads...i cant seem to get the bolts holding the caliper on the rotor off.....is there a different way in turning the bolts? or lefty loosey righty righty?
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Old Aug 30, 2005 | 10:02 PM
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you dont need to take out any bolts,just pop the 2 pins and the spring thingy on the top pops off,then just pull out the pads.
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Old Aug 30, 2005 | 10:06 PM
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Yea I just put a brake pad ontop of the pistons, then c-clamp that shiet... but I have a lexus and the brakes are diff. I don't have to worry about scratching any paint or anything.
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Old Sep 1, 2005 | 08:33 AM
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From: NJ
Originally Posted by Evolutionken
guys..now im doing the front brake pads...i cant seem to get the bolts holding the caliper on the rotor off.....is there a different way in turning the bolts? or lefty loosey righty righty?
???

Why are you trying to remove the caliper? Is it time to change rotors?

Emre
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Old Sep 1, 2005 | 08:55 AM
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Guys, this is very easy. Just take a nail and a hammer and tap out the two pins that hold down the spring on top of the pads. Tap the first one out, remove the metal spring and the second one should tap out pretty easily. Then, mash the pad against the pistons as best you can to get the pad out and compress the pistons a little. Once the pad is out just take a flat head screwdriver and (while covering the rotor with a cloth and using it as a pry point) pry the pistons in one at a time. While prying one, keep a finger on the other as it will want to push out while pushing the other in. Do the same thing for the second piston (make sure you hold the other piston down.) Do one pad at a time, it's easier to compress the second set of pistons this way. It is easier to pry off the shim attached to the brake pad by starting at the small metal clip on the corner of the pad. There is a small hole there large enough to get a flat head under. Be careful not to bend it too much. also, clean it off so you can see the arrow on it. That arrow should be pointing up and the other shim with two small "claws" on it will have an arrow shaped hole in it that points the same direction. Install the pads in the reverse order. Make sure you grease those puppies up too unless you want squealage. PM me for more info.
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Old Sep 1, 2005 | 09:57 AM
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From: 41° 59' N, 87° 54' W
Piece of wood will work ... if the entire caliper is off, a 2x4 fits, but if you're only changing pads, then you'll need something smaller. I've used C-Clamps, but if you're not careful, you'll scratch the caliper.

l8r)
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Old Sep 1, 2005 | 10:20 AM
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Allright guys,

The proper way to replace pads ...

Place a flatip screwdriver between the pad and rotor.

Pry the pad towards the caliper piston(s) while simutaneously
opening the bleeder valve. ( This will release the pressure )
Once pad is pulled in towards piston, close the bleeder valve as to
not let any air get into the brakeline(s).

Repeat the procedure for the other pads as we have multi-pistom calipers.

Depending on the pressure alot or a little brake fluid will comeout of the bleeder.

This will allow the needed clearance to slide the newly installed pads
over the rotor.

You may need to top off your master cylinder with the proper brake fluid.



Hint: Can use a small vacumn hose, fuel hose or whatever to put over the
nipple of the bleeder valve.

Get a small can or bottle and poke a hole in the lid, than feed the hose through it.

Make sure the hose is long enough and does not kink so the fluid goes into
the bottle or can.

This should help make your installation a little cleaner.


.

Last edited by Spec'd; Sep 1, 2005 at 10:22 AM.
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Old Sep 1, 2005 | 10:26 AM
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From: Southern California
ttt
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Old Sep 1, 2005 | 01:42 PM
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From: DFW TX
If you must do it using the bleeder valve please be careful with the brake fluid as it will quickly eat through the clear coat on the caliper.
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Old Sep 1, 2005 | 01:49 PM
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From: 41° 59' N, 87° 54' W
There's no need to mess with the bleeder valve (unless you plan on bleeding your brakes, which IMO is never a bad idea). Just open the cap of the brake fluid reservoir. Loosen it, but leave it covering the reservoir. That will allow you to compress the piston(s) w/out issues.

l8r)
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