It s like trying to stretch the too small rubber band around the groove.
Caliper piston rubber boot ripped.
All that s left is a bit of the melted and torn remains of the boots.
Feed in compressed air.
If the caliper boot is torn open then you will get dirt debris water and road salts in the caliper piston surface.
If the boot is torn then you have 2 choices.
Can i continue to safely operate my car with no dust boots.
The piston will come out.
Loosing pressure and fluid in the brakes could cause a dangerous situation on the road.
So this can cause all the dirtiness to come into the calipers which will cause the pistons not to slide correctly.
In boston assuming standard wet roads etc.
That is no big deal unless the rubber boot is torn.
Push the piston all the way in and use a small plastic pry tool to pry out the dust seal.
If the piston won t come out easily work it out with your fingers and you ll see the dust boot.
Keep your hands clear.
Last night i swapped the track pads back to stock pads for street use and i noticed that the rubber dust boots that are supposed to cover the pistons are gone.
There is another alternative to replacing the caliper.
The caliper may seize or tear the caliper piston seal causing a loss of brake fluid.
So i have two questions.
There s a bit of fussiness involved to get the outer seals like your torn one situated.
The piston has a rubber boot around it protects seals and lubricates the piston.
Replace the caliper and bleed the brake.
Step 4 removing the boot.
Buy a caliper seal kit for 10 or so and just replace the dust seal.
A compressor pump is useful for popping out the pistons after the caliper is pulled.
No fluid will escape so you won t have to bleed the system.
When replacing the brake pads this rubber boot can be easily get torn while retracting the piston back into the caliper.
Put the caliper on a flat surface with a piece of wood in front on the piston.
Attach an air hose to the hole where the fluid enters the caliper.
Rebuild for an otherwise good caliper is straightforward.
That is the rubber lining that you are referring to.
Quick simple trick to doing a brake job properly.