Brake Pads - Rear, Replacement - DIY Article

[Pottu]

Thank you Art, I appreciate your input. And I do remember you warning me earlier I might see some other badly done DIY, and hate admit but right you were.

I ordered a set with the pin, rubber boots and piston seals, hopefully this will get the job done.

When cleaning the piston and carefully moving it in and out I noticed some black material coming out and retracing back in with the piston. Looked to me like rubber as I wasn’t able to clean that material, which made me think the outer seal (dust seal I believe) might be worn. There are no leaks (yet) so I’m not sure if I should open it up and change the seals now or leave it for later. This would obviously then require filling and bleeding the system.

[Art]

There are two seals (the inner piston seal and the outer dust seal) to remove them you need to remove the piston which means you'll need to drain some brake fluid too. If the brake fluid is not leaking I'd invoke the 'if its not broke don't fix it' rule

[Pottu]

Sorry for having to make a really stupid question, but what the heck is the thread size of this slider pin? Tried few sizes but M8 was tight and M10 too big 

So is it for example M9 x 1.25 mm? Didn’t have any to try in the store I just went.

Having problems finding a Helicoil set and would like to confirm this first.

[Art]

I thought they were M10 x 1.25

Assuming you have a pad pin in the other caliper take that out and measure it.

[Pottu]

Originally Posted by Art

I thought they were M10 x 1.25

They seem to be M10. Also measuring the diameter with a caliper gives 10mm sharp.

I was puzzled by the smaller thread that obviously didn’t go into the nut I first tried…