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Unread 09-24-2011, 06:22 PM   #1
Sherms-CJ7
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Is this caliper OK

I was going to clean up and paint my front brake calipers, but found a alot of corrosion on the outer part of the caliper piston. Is this OK, or will it leak? Should I rebuild the calipers? I'm thinking that part of the piston doesn't go into the caliper any further, so it'll probably be fine, but I want to make sure before going to the trouble of cleaning and painting etc. Also, as the everything is taken apart ... how do I get the piston out further?

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Unread 09-24-2011, 06:33 PM   #2
budgetCJ7
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Were they working when u removed them? Seal looks suprising good!! Is this for street use? If so I'd look into getting some rebuild ones just to be safe. I redid pads and brake lines only to find out i had small leak coming from piston ring, which made my drivers side not as affective as my passenger side. In turn my jeep was pulling bad when breaking!! I had to tear everything apart for a second time and get new calibers. I picked up referbs from advanced for $35 total after i got back core charge of $20 each. buy them online and look for online discount at retailmenot.com
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Unread 09-24-2011, 06:36 PM   #3
skizriz
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If you don't have a reason for taking the piston out, don't mess with it. You could open up a can of worms.
Just clean everything up and throw some paint on it. That rust looks normal compared to every one I have ever seen.
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Unread 09-24-2011, 06:39 PM   #4
Sherms-CJ7
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Yes, they were working when I started my rebuild a year and a half ago. They've been off for a few months now, but I'm sure the corrosion was there already as the jeep had been sitting outside for a few years

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Originally Posted by skizriz View Post
If you don't have a reason for taking the piston out, don't mess with it. You could open up a can of worms.
Just clean everything up and throw some paint on it. That rust looks normal compared to every one I have ever seen.
I'm thinking that's good advice! You think it basically looks normal ... Thanks, that's what I was hoping to hear! Just wanted to make sure before going to the trouble of cleaning and painting!

Thanks again -
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Unread 09-24-2011, 06:50 PM   #5
skizriz
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IDK about the 82, but I had the calipers off of my 78 today to do wheel bearings. I tried to push the piston in more to get them on easier, and it would only go in as far as yours is.
I thought the same as you did, they should push in farther. Doesn't seem like they do though.
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Unread 09-24-2011, 07:05 PM   #6
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The real question is what does the piston look like when you extend it? The part that will ride on the seal. I replaced mine with remans for about 30.00 and they work great.
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Unread 09-25-2011, 09:09 AM   #7
Sherms-CJ7
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Hey Paul!

Haven't gotten it extended as I haven't figured out how to do that yet ... the whole brake system is disassembled and I'm not sure I have anything to use to pump it out.

Best regards,
John
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Unread 09-25-2011, 10:21 AM   #8
Coiz
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An air nozzle in the brake line hole will extend out the piston. Start with low pressure and work your way up. Keep your fingers out of the way and place a piece of wood in there so the piston can not come all the way out or you'll end up having to rebuild or replace it.

This is probably what you're looking at under that dust boot/seal.
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Unread 09-25-2011, 03:17 PM   #9
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As cheap as rebuilt calipers are, I don't think I'd mess with cleaning those up, painting them, and then hoping they work okay when reinstalled. New/rebuilt calipers are good insurance and will already be sand blasted so they'll look good in paint.
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Unread 09-25-2011, 08:32 PM   #10
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Quote:
Originally Posted by Coiz View Post
An air nozzle in the brake line hole will extend out the piston. Start with low pressure and work your way up. Keep your fingers out of the way and place a piece of wood in there so the piston can not come all the way out or you'll end up having to rebuild or replace it.
Thanks again Mike! Great sugestion - that's what I'll do!

Quote:
Originally Posted by BESRK View Post
As cheap as rebuilt calipers are, I don't think I'd mess with cleaning those up, painting them, and then hoping they work okay when reinstalled. New/rebuilt calipers are good insurance and will already be sand blasted so they'll look good in paint.
Thanks Eddie! Didn't know rebuilt calipers were all that cheap; I'll look into getting a set.

Thanks all!
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