Full Caliper Rebuild Kit

[jnoremac]

Does anybody have a link to a rebuild kit for the calipers that includes the pistons? I’m reading that there are two different piston sizes but the kits I’ve found only have one singular piston size included or elsewhere I can only find the seals/shoes. TIA!

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[razorlab]

https://racingbrake.com/search-results-page?q=bv-42

And

Auto Brake Solutions

 

[Rizen]

https://racingbrake.com/search-results-page?q=bv-42

And

Auto Brake Solutions

FWIW - I bought the Auto Brake Solutions kit, with the higher temp silicon dust boots, and I could not get the dust boots to seat on the caliper no matter what I tried. Not my first time rebuilding a caliper and the smaller piston seals were just fine, but the larger seals seem to have a steel ring in them and would not seat no matter what I did. I could get them close if I took a socket that matched their size and used all of the force I could muster but that can't be the correct way of installing them. I'd go with the other brand.

 

[ericchen_ec]

FWIW - I bought the Auto Brake Solutions kit, with the higher temp silicon dust boots, and I could not get the dust boots to seat on the caliper no matter what I tried. Not my first time rebuilding a caliper and the smaller piston seals were just fine, but the larger seals seem to have a steel ring in them and would not seat no matter what I did. I could get them close if I took a socket that matched their size and used all of the force I could muster but that can't be the correct way of installing them. I'd go with the other brand.

i used 2 clamps to get my dust boots to seat, held one side down, and on other side used the clamp to force the other side, then used like an allen key or something to push in any raised portions to fully get it in.
Really thought no way it should be this hard to re-installed the boots and prayed for no issues, none so far....

 

[jnoremac]

Is it a hard diy? I was trying to find places near me that could maybe do it since I don’t want to break anything but haven’t had any luck finding anywhere

 

[ericchen_ec]

Is it a hard diy? I was trying to find places near me that could maybe do it since I don’t want to break anything but haven’t had any luck finding anywhere

Frustrating if anything, this is the first car I started to work on myself, no previous car mechanic experience beforehand. do-able, but it is brakes, so whatever you feel confident at.

 

[Rizen]

Is it a hard diy? I was trying to find places near me that could maybe do it since I don’t want to break anything but haven’t had any luck finding anywhere

Not really, no.

Brakes are a very simple hydraulic system.

The caliper is two piece but to rebuild it, you don't need to separate it. All of the seals and pistons are accessible without doing so.

- Remove caliper from car
- Use compressed air to blow the pistons out, place a block of wood or other soft-ish object in between the caliper to prevent the pistons from shooting across the room
- Remove the inner seals
- Remove the dust boots
- Lubricate and install new seals and dust boots, reinstall pistons (they go in with hand force, press not required)
- Reinstall calipers on car
- Bleed brakes

Brembos are pretty much the same on most cars, you can find a YouTube video that covers this.

It is not a hard job, but brakes are a critical safety system so if you have never done it before and don't feel confident, don't feel bad shopping it out to a pro.

 

[Traxion]

It is not a hard job, but brakes are a critical safety system so if you have never done it before and don't feel confident, don't feel bad shopping it out to a pro.

I'm about to do a rebuild on mine, what did you do to cap off the brake line after you removed it?

Also I ran across your post here about difficulty with dust boots: https://www.supramkv.com/threads/oem-disk-brake-caliper-piston-boots-front-rear.15812/#post-242681

Also it seems like you finished the rebuild so in anticipation of having this same problem, what did you end up doing? You mention you went with the AutoBrake Solutions kit, the guy in the other thread would have bought the Racingbrake kit and had the same problem so both kits seem to have that dust boot tightness symptom.

 

[Rizen]

I'm about to do a rebuild on mine, what did you do to cap off the brake line after you removed it?

Also I ran across your post here about difficulty with dust boots: https://www.supramkv.com/threads/oem-disk-brake-caliper-piston-boots-front-rear.15812/#post-242681

Also it seems like you finished the rebuild so in anticipation of having this same problem, what did you end up doing? You mention you went with the AutoBrake Solutions kit, the guy in the other thread would have bought the Racingbrake kit and had the same problem so both kits seem to have that dust boot tightness symptom.

I used the Racing Brake kit with the stainless pistons and had zero issues with it. The boots fit correctly.

For capping the lines, I covered them with a small rubber cap like what you would use to cap a vacuum line, then zip tied it tighter around the line and then zip tied the line facing upward. That kept it from draining the master cylinder.

After this job, the brakes felt fantastic at Lime Rock.

 

[Z4m40i]

I haven’t tried their higher temp dust seals, but I feel like dust boots on track cars is like washing a car before it rains… fortunately haven’t had any issues for the last two years like this.

I wish there was a better solution other than going with race calipers. The stainless pistons are an interesting concept though.

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