66 Mustang - SSBC Brakes - Rebuild??

[KonKon]

Hi Guys

I have SSBC disc brakes (caliper part No's 09515 & 09516 for the LH side).

I re-kitted them with new seals just 2 years ago and they are blowing out very dirty brake fluid when bleeding. I've just pulled them apart and they are full of gunk. I don't want to have to do this every 2 years.

The pistons look great, shiny after a clean. Quite a bit of corrosion on the outside of the inner seal and in the groove of the our seal.

I put in a new master cylinder at the same time and bled the heck out of them at the time and I used a standard Mustang seal kit to rebuild.

So my questions are;
How should I clean the calipers? Can I bead blast them? I assume it's only the piston that must not get pitted.

Is the SSBC caliper the same sizes as the standard Mustang? There is nowhere to ask on their web site - thanks for the after sales service! I wonder if is this is the issue, although I recall it was a tricky tight fit, so I assume it was OK.

Does anyone have the spec of the standard set-up so I can measure?

Thanks in advance, I am a bit desperate as I'm in New Zealand so my buying options are limited.

[KonKon]

I asked the question on SSBC Facebook and got an immediate answer - for parts they are the same as the 67 Mustang and Falcon, so that is great news. I just wonder about the bead blasting?

Here are some photo's. The pistons are great but you can see the water was really getting in. Oddly the car lives inside and rarely gets wet - as you would expect.

[22GT]

You can bead the outside, but I would not bead the piston bores. The seal groove must be absolutely smooth to get a proper seal. That includes the part of the groove you cannot see. The seal groove in these is not square, it is ever so slightly a V. This, strange as it may sound, is what retracts the brake from the rotor when you release the brake. A scraping tool, or perhaps a tiny wire wheel on a Dremel will do.

The irony here is that SSBC's original business was rebuilding OEM calipers, with stainless pistons. Hence the name. Then they started selling conversion kits, and after a while I guess they decided all that grubby rebuilding was no fun so they stopped doing it.