My 2017 has about 52k miles and several track days on it. I want to rebuild the calipers. However I'm not sure how to do it on a six pot Brembo. I've rebuilt many calipers, but this six piston has me a bit perplexed. Will all six pop out, at the same time, using the air pressure and wood board in the middle method? My other question is installing the pistons and new dust boots. Since the calipers are a mono block. I don't see any way for me to use my press or any tool that will put even pressure on a piston or boot to easily put them back in. Do both piston and dust boot easily go back on just using hand pressure?

I've searched this forum and the web for clues. But haven't found anything that's answered my questions. Most of the search results show Brembo calipers where they split apart. However all of those were 4 piston calipers.

 

The air pressure and wood block method works fine. However, the wood block needs to be thick enough to prevent the pistons from popping all the way out. The reason for this is they typically don't all move at once and if one pops out the others won't move. You just need them to pop out far enough that you can grab them and pull them out.

To reinstall once you have replaced the worn parts use some brake assembly fluid. The fluid can be hard to find at auto parts stores since nobody rebuilds calipers anymore. I purchased Centric Assembly Fluid a number of years ago and am still using it for brake work. Amazon has a limited supply You don't have to worry about contaminating the brake fluid as the assembly fluid is compatible with brake fluid.

Using the assembly fluid the pistons with seals will just push into the cylinders with barely any effort. The fluid makes things really easy although it is very slippery so you want to have a table covered with a large clean cloth when doing the assembly. That way you won't be as likely to drop something on a floor.

If you get GM rebuild kits for the calipers they more than likely will have more replacement parts and small tubes of assembly fluid than aftermarket seal kits have. The GM kits may have replacement pistons and caliper hardware that other kits don't have. That is one reason why they can be more expensive.

Bill

 

Thanks Bill.
One more question. Will soaking the new seals in fresh brake fluid lubricate them just as well as the brake assembly fluid? I've used the hardware assembly lube that usually comes with a seal kit for the external components. I've always poured fresh fluid in a cup and dropped the seals in at the beginning of the brake job. So they would soak for 20-40 min.

 

I’ve rebuilt a few sets an I find it easier to leave the bleeders in an disconnect the crossover line an blow each side individually, as far as tools are concerned I wish I could find a tool to press in the boots but I’ve had good luck doin them by hand.