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Still can't get my rear calipers wide enough

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Old 07-26-2012, 12:37 PM
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rithsleeper
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Default Still can't get my rear calipers wide enough

Trying to put in new rotors and pads. I can put the old ones back, but the old rotors have been turned once and the pads are worn. Here are pics side by side the new ones. Don't think I have the right tools to get the thing wide enough.... Any ideas?

Tried the whole wood press thing, couldn't really get a good hold of it. always odd angles.


Old 07-26-2012, 12:46 PM
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joe paco
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I have used the wood block, old pads, whatever, many times. after I shim the wood block where I need it, I insert a wide blade "crow bar" and twist the handle. if you measure the opening against your rotor, pads, it should fit, no?
Old 07-26-2012, 01:12 PM
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LTxDave
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I use a C-clamp and the old pad. Watch th fluid in the master cylinder to make sure it doesn't overflow when you compress the brake cylinders.
Old 07-26-2012, 03:13 PM
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AGENT 86
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Originally Posted by gsdave
I use a C-clamp and the old pad. Watch th fluid in the master cylinder to make sure it doesn't overflow when you compress the brake cylinders.
Old 07-26-2012, 03:21 PM
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tbirdsps
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Quite often the pads are "rebuilt" and are thicker than stock because they assume the rotors have been turned so in order to meet spec the pads are thicker.

Otherwise you have to retract the caliper all the way and sometimes it takes cracking the bleed port to do it. Sometimes the bore inside will get corroded and the puck can't go all the way back in.
Old 07-26-2012, 04:14 PM
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oldalaskaman
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Originally Posted by gsdave
I use a C-clamp and the old pad. Watch th fluid in the master cylinder to make sure it doesn't overflow when you compress the brake cylinders.
did this one on mine, works good, dont be afraid to really reef on the clamp, the piston needs to go all the way in.
Old 07-26-2012, 05:35 PM
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kimmer
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C clamp is the way to go.
Old 07-26-2012, 06:04 PM
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Kubs
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Do you use the parking brake? Sometimes along with the c-clamp method you have to screw in the parking brake piston.
Old 07-26-2012, 06:12 PM
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383vett
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With the old pads in the caliper, I use a pair of screwdrivers, then the handles of 2 breaker bars or whatever will fit and push with one and pull on the other so they work against each other and push the pads apart. Keep pushing until the pistons are seated in the caliper.
Old 07-26-2012, 10:18 PM
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93Rubie
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The parking brake as long as it is off, should NOT keep the piston from going in at all. They are separate NOT like the newer GM integral calipers at all where you have to screw them back in.

Use an old pad and a c clamp, crack the bleeder open. If it will not go. The caliper is jammed and junk or you could get a rebuild kit and hope for the best.
Old 07-26-2012, 11:25 PM
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rithsleeper
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I just had to pry on it harder. I was afraid id break the caliper since it looks like just cast iron. Got it, thanks guys.
Old 07-27-2012, 01:13 AM
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Phat98
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I use an old steering wheel puller to depress the piston in the caliper...works on every vehicle and motorcycle in the inventory!
Old 07-27-2012, 01:31 AM
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oldalaskaman
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excellent
Old 07-27-2012, 08:28 AM
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Geardo
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I crack the bleeder, then it's easy
Old 07-27-2012, 02:01 PM
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SunCr
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It shouldn't be hard with a C-clamp - or if it is, you need to rebuild it. There's only atmospheric pressure on the system at rest. It doesn't hurt of course to get any crud off the outside of the piston first and/or you can carefully lift the boot and spray in some fast evap brake cleaner.
Old 07-27-2012, 10:53 PM
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93Rubie
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Originally Posted by SunCr
It shouldn't be hard with a C-clamp - or if it is, you need to rebuild it. There's only atmospheric pressure on the system at rest. It doesn't hurt of course to get any crud off the outside of the piston first and/or you can carefully lift the boot and spray in some fast evap brake cleaner.
Old 07-27-2012, 11:56 PM
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Jam a big flat screwdriver between the rotor and the pad and pull.

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Old 06-28-2014, 01:11 PM
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Trithings
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Default rear calipers

Do the rear calipers pistons on a 93 get pushed in or do you need a tool to screw them in??
Old 06-28-2014, 01:47 PM
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Cyclonite
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Originally Posted by gsdave
I use a C-clamp and the old pad. Watch th fluid in the master cylinder to make sure it doesn't overflow when you compress the brake cylinders.


It's very close with new pads and rotors, but use a big C clamp or get a caliper piston compressor tool and using the old pad make sure the piston is seated all the way in the caliper. Then grab a beer :-)
Old 06-28-2014, 02:28 PM
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Sidney004
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Originally Posted by Geardo
I crack the bleeder, then it's easy
Me too, never fails!



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