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2005 G6. I am trying to replace rear disc brakes. I cant compress piston to go over new pads. I have tried a C clamp I just bent handle trying to turn.
I dont see anyplace for a hex socket to turn piston. I just see 2 notches on piston. How do I compress piston? Please help
 

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Tell us where were they?
For the rear you need to turn the piston as you crank with the C clamp. It's a lot easier with the right tool. Any good parts store has the tool.

Mark.
 

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The tool to use is a universal brake caliper tool, I picked mine up from Pep boys for $10 bucks. The tool fits on a socket wrench and you turn it clockwise to depress the piston into position.
 

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4.6 Interceptor
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I just used a pair of sturdy needle nose pliers to get int the groves and twist, no pressure needed.
There you go ...One has to be creative :doh:
 

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^I R CUSTOM^
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Wow, i'm glad i read this...I just did my front brakes two weeks ago and plan on hitting the rears this weekend and I probably would have screamed obscenities throughout the neighborhood trying to do it without knowing to turn the piston!!
 

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Wow, i'm glad i read this...I just did my front brakes two weeks ago and plan on hitting the rears this weekend and I probably would have screamed obscenities throughout the neighborhood trying to do it without knowing to turn the piston!!
Or worse..... broke them!!!
 

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Decepticon Extraordinaire
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Its a Borg tool. Costs about $11 at any corner auto parts store.
Just match it to the piston and turn with your 1/2 socket wrench.



This is for the rear e-brake center piston- for those who dont know what we are talking about. =^)
 

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Ok, so how far should the piston go in? I used some needle nosed pliers and got in where about 1/8th of it was sticking out but when I finally got the pads in place and spread as far as the caliper assembly could go, the gap between was too narrow. It seems to me that the piston should reseat itself all the way back into the cylinder but it won't go any further. I am at a total loss here but will this borg tool help? Anything else as far as this goes would be really appreciated.
 

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Decepticon Extraordinaire
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Yes the piston will screw down to open it up easy cheesy- and use the tool not needlenose pliers.
Tork it down just enough to get the caliper back on. Once it is all bolted back up you will pull many many times on your e-brake handle to tighten the piston back up against the new pad.
 

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Thanks for the input here. Ok, here was the problem. 50% of it was some sloppy reboxing by Kragen's and the other 50% was my frustration getting in the way of seeing the obvious. You see, inside the box for a rear rotor was a front rotor. Front rotors are where most of the stopping power is applied and so they are beefier with venting and all of that. The rear rotor, as this car has prescribed, are usually solid and are designed for the type of e-brake mechanism installed. Had I just taken a breather and looked at the old and new rotors, I would have seen it right away. In fact, it should have been more obvious alone. The piston was in fact all the way in as far as it could go which on this car leaves about an 1/8th of an inch outwards. Incredibly, and after having gone back to get the correct rotor, the hardest part about this was putting the pads in with new clips as the caliper assemblage is rather small and makes for a difficult proper installation of them. Thanks again.

Oh, and got the "Borg" tool now too so that won't ever be a problem ever again either.
 

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I used a bar clamp (Wood Clamp) and it worked perfect.
You can also open up a bottle of beer with your teeth. ;)

I know what your saying but i recommend you use the tool designed for it to prevent maring the piston or damaging anything.

Its not like its expensive or anything.
 

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You can also open up a bottle of beer with your teeth. ;)

I know what your saying but i recommend you use the tool designed for it to prevent maring the piston or damaging anything.

Its not like its expensive or anything.

What can I say other than I'm an idiotic 17 year old.
 

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Buy the tool. What ever you do, do not compress the piston with a C-clamp. With the tool it only take a second to turn the piston to where it needs to be.
 
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