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cant get rear caliper piston to compress

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Old 08-02-2004, 11:19 PM
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Default cant get rear caliper piston to compress

well i tried to put some new rear pads on and the piston woulding compress. opened the bleeder and still nothing. i heard i need to get some sort of tool to compress it. how do you guys get yoru rear brake piston compressed?
Old 08-02-2004, 11:25 PM
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Yes you do need a special tool that turns the piston clockwise while pushing it in.
Old 08-02-2004, 11:26 PM
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Been a while since i replaced them but i think they screw in. You can also use needle nose pliers to turn them in.
Old 08-02-2004, 11:36 PM
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FYI, Pep Boys sells the tool. Only like $10

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Old 08-02-2004, 11:40 PM
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Originally Posted by WS6FirebirdTA00
well i tried to put some new rear pads on and the piston woulding compress. opened the bleeder and still nothing. i heard i need to get some sort of tool to compress it. how do you guys get yoru rear brake piston compressed?
I just put pads and rotors on the back on my camaro, and I didn't have to turn any part of the piston, all I did was use a brake pad in front of the piston and pushed in very slowly with a large pair of channel locks, unless brakes on a pontiac are different(which they aren't) the rear does not have an actuated piston, are you sure the pistons are not locked up?
Old 08-03-2004, 12:26 AM
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Took a look at an old rear end i got, zombie1 is right they are push in piston. Like he said channel locks or a c-clamp will do.
Old 08-03-2004, 01:21 AM
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Yep, all you need is a large C-clamp.
Old 08-03-2004, 08:30 AM
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Ooo 2000, my bad.
Old 08-03-2004, 11:17 PM
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i tried and was squeezing really hard, guess ill give it a shot again tomorrow
Old 12-07-2004, 08:00 AM
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This thread is a little old but I'm a little confused.

Do you need a special tool to assist in compressing the rear calipers or not? The write-up on installuniversity.com doesn't mention anything.
Old 12-07-2004, 08:47 AM
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nope mine was just hung up, when i took the caliper off the car and hit it with a hammer a little bit, it went right in. or u can put a screw driver in the center and put all your weight on it
Old 12-07-2004, 08:49 AM
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Originally Posted by WS6FirebirdTA00
nope mine was just hung up, when i took the caliper off the car and hit it with a hammer a little bit, it went right in. or u can put a screw driver in the center and put all your weight on it
great, thanks for the quick response! I need to install new rotors/pads ASAP.
Old 12-07-2004, 10:44 AM
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Use the old pad and a c-clamp.

The screw in method is for cars with the parking brake (e-brake) integrated into the caliper. LS1 4th gen f-bodies have a separate parking brake mechanism that is a drum on the inside of the hat of the rear disks.

Last edited by VIP1; 12-07-2004 at 03:07 PM.
Old 12-07-2004, 12:11 PM
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Originally Posted by VIP1
Use the old pad and a c-clamp.

The screw in method is for cars with the parking brake (e-brake) integrated into the caliper. 4th gen f-bodies have a separate parking brake mechanism that is a drum on the inside of the hat of the rear disks.

LS1 4th gens have that. LT1's do not, they screw in.
Old 12-07-2004, 03:07 PM
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Originally Posted by trackbird
LS1 4th gens have that. LT1's do not, they screw in.
OK, I corrected my post.

The screw in kind is such a PITA. My mother's old 1990 Lumina had them. There was a trick to get them to compress. You couldn't just screw them in. After a couple turns, you'd get no progress and have to back up a bit to continue on. You also had to push while you turned. I also used needle nosed pliers which meant that I slipped alot. I didn't see the tool until after we got rid of the car...oh well.
Old 12-08-2004, 08:30 AM
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Originally Posted by VIP1
OK, I corrected my post.

The screw in kind is such a PITA. My mother's old 1990 Lumina had them. There was a trick to get them to compress. You couldn't just screw them in. After a couple turns, you'd get no progress and have to back up a bit to continue on. You also had to push while you turned. I also used needle nosed pliers which meant that I slipped alot. I didn't see the tool until after we got rid of the car...oh well.

I just didn't wnat anyone to try to crush an LT1 caliper.

I bought the tool (it's a press/rotator) for my VW GTI that I had, but it works on most of them and has been quite handy. It's not cheap though.

This is the one, it's overkill for our cars, but VW's and many others require you to spin and compress the piston at once.

http://www.lislecorp.com/tool_detail.cfm?detail=270



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