I searched forums - but didn't find any thread related to this problem... I was replacing my front break pads and noticed problem with one of the pistons - it hardly moved, and the pad on that side was twice thinner than others. The boot on that piston is very loose - so I guess dirt and water did a job,
Did anybody ever replace just one piston on H3? Does it make sense? Should I replace whole caliper?
Sticking Caliper Piston
- yevych
- CHC Pilot
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Sticking Caliper Piston
2010 H3 Adventure 3.7L - Hummer evolution
, 35" Mickey Thomson MTZ on 16" MT SideBiters, oem underbody & rocker protection, Safari snorkle, K&N filters, Air Doc intake, Rola roof rack, Off-road lights, Runva winch on High-Mount and Warn on tray, Outfitter heavy duty tie rods.

- Toxicrider
- CHC Pilot
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- Location: Milton, On
Re: Sticking Caliper Piston
Calipers are fairly cheap, think I paid $130 for the last one I bought, so I would just replace it and be done with the problem.
- whitehumh2
- CHC Trail SuperGuide
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Re: Sticking Caliper Piston
I agree, replace the caliper as an assembly!
<p class="bbc_center">1 - There is a time for everything,
and a season for every activity under the heavens:
3b - a time to tear down and a time to build,
5 - a time to scatter stones and a time to gather them,
Ecclesiastes 3:1,3b&5a
and a season for every activity under the heavens:
3b - a time to tear down and a time to build,
5 - a time to scatter stones and a time to gather them,
Ecclesiastes 3:1,3b&5a
- yevych
- CHC Pilot
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Re: Sticking Caliper Piston
Thank you guys. I was inclining toward replacing the whole thing - since I wasn't sure if it worth to play with piston... The boots on other pistons seems like close to their end of life - so I guess it make sense to take preventative measures :-). Any suggestion for brand/place to buy?
I'm planning to replace on my own - do you have any tips?
I'm planning to replace on my own - do you have any tips?
2010 H3 Adventure 3.7L - Hummer evolution
, 35" Mickey Thomson MTZ on 16" MT SideBiters, oem underbody & rocker protection, Safari snorkle, K&N filters, Air Doc intake, Rola roof rack, Off-road lights, Runva winch on High-Mount and Warn on tray, Outfitter heavy duty tie rods.

- Toxicrider
- CHC Pilot
- Posts: 183
- Joined: Wed Apr 24, 2013 8:53 pm
- Location: Milton, On
Re: Sticking Caliper Piston
I bought mine in London at APC. Be prepared to replace the brake line as well depending on how rusty yours is. Mine broke as soon as I tried to remove the banjo bolt from the caliper. Other than that it is pretty straight forward.
- yevych
- CHC Pilot
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- Joined: Thu Mar 04, 2010 1:35 pm
- Location: Toronto
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Re: Sticking Caliper Piston
I found some helpful info on YouTube (not for H3 through) ... and decided to help the next guy :-)
https://www.youtube.com/watch?v=iJauREbtRxY
https://www.youtube.com/watch?v=iJauREbtRxY
2010 H3 Adventure 3.7L - Hummer evolution
, 35" Mickey Thomson MTZ on 16" MT SideBiters, oem underbody & rocker protection, Safari snorkle, K&N filters, Air Doc intake, Rola roof rack, Off-road lights, Runva winch on High-Mount and Warn on tray, Outfitter heavy duty tie rods.

- GreenMeanie
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- Joined: Tue Jul 22, 2008 3:28 am
Re: Sticking Caliper Piston
Although the calipers are quite cheap to buy and readily available everywhere they are also quite simple to rebuild and a lot less expensive. The repair kits were about 15 bucks IIRC.
Early 1997 HMC4, 1 of 35, Original Block H296, 110,000 miles and no cracks yet, G10 green
Custom made Brush Gaurd, Roof Rack, Overhead Console and Sound System.
Custom made Brush Gaurd, Roof Rack, Overhead Console and Sound System.
- yevych
- CHC Pilot
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- Location: Toronto
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Re: Sticking Caliper Piston
[quote="GreenMeanie"]
Although the calipers are quite cheap to buy and readily available everywhere they are also quite simple to rebuild and a lot less expensive. The repair kits were about 15 bucks IIRC.
[/quote]
That is something that I want to try when I have time. I didn't have to return my old calipers... so the plan is - to get repair kit and try to rebuild it before I have problem with my new ones... at this time - the only problem is to find the time
Although the calipers are quite cheap to buy and readily available everywhere they are also quite simple to rebuild and a lot less expensive. The repair kits were about 15 bucks IIRC.
[/quote]
That is something that I want to try when I have time. I didn't have to return my old calipers... so the plan is - to get repair kit and try to rebuild it before I have problem with my new ones... at this time - the only problem is to find the time
2010 H3 Adventure 3.7L - Hummer evolution
, 35" Mickey Thomson MTZ on 16" MT SideBiters, oem underbody & rocker protection, Safari snorkle, K&N filters, Air Doc intake, Rola roof rack, Off-road lights, Runva winch on High-Mount and Warn on tray, Outfitter heavy duty tie rods.
