Last weekend when replacing front brake pads from "Brand x" (whatever was on the car when purchased) to a set of used OEM brembo pads I noticed that the rubber seals around the pistons have some interesting deformities.

There werent any tears or breaks in the rubber material, however there were some small bluges which looked like little bubbles. Probably 5-8 of these "bubbles" in a sequence on each of the rubber seals.

Have any of the best and brightest (you guys!) experienced this or have feedback of how the Brembo calipers wear over time?


Vehicle: Evo IX
Mileage: 42K miles
Track use: one auto-x during my ownership, previous owner seems to have rallycrossed it based on quantity of dirt/mud under vehicle
Geographical location: Car has only been owned by Oregon or Washington residents

 

Sounds like the dust boots. You can replace those very easily if you want. Check out Girodisc for rebuild kits.

If you really wanna 'rebuild' them though, you should pop out the pistons altogether and replace the inner seals. Those are what can expand and cause leaking and are the parts you should be concerned with. Again, Girodisc has the parts and it's not that bad of a job. I've done it several times as maintenance on a track car.

G/L.

 

if it is just the dust boot I would not worry about it, but if the boot is keeping the piston from moving freely then rebuild.

 

Is there a how to on rebuilding calipers?

 

Yes, there should be one in the How-To section. I think that's what I used.