930 Brake Calipers

[126coupe]

I am rebuilding my 930 calipers wow 8 seals per caliper! $265.00 for all 4 calipers wholesale! My question I want to refinish them, whats the best tecnique and products to use?

[GeorgeM]

Media blast to clean them.

Powdercoat would be the most rugged.

Second choice would be brake caliper paint.

Third would be engine paint. That's what I used and it works fine. Just keep the brake fluid off of it.

[126coupe]

Whats media blast? Powder coat would require dissasembly of the caliper halves? What product is the best to paint them?

[David]

I split the calipers in half and glass bead blast cleaned them making sure I didn't blast toward the piston side of the caliper. I cleaned the caliper halves with compressed air and brake cleaner then reassembled the halfs. Then I cleaned them again with brake cleaner and painted them with caliper paint from Pelican.

There was not very much dirt in the piston bores, so I just wiped them out with a rag and brake cleaner. For the pistons, I very carefully scrapped them using new razor blades, then I wiped them with brake cleaner. The pistons were in very good shape for a 24 year old car. I was not to thrilled about the price of the dust seals either.

[RACER911RS]

Minkoff,

I sent mine out to be cleaned and powder coated. They did not split the halves. I think the people who are doing this charge around 400-500 to clean and powder coat for all 4.
BTW, if you do get them powder coated, it is recommended to change the seals due to the baking process.

I can save you a few bucks if you like to buy some seals. All 4 corners for $200. plus shipping. If interested PM me.

Paul

[126coupe]

Thanks racer rs I already bought the seals

[rcwaldo]

They bake powdercoat at about 450F. I am not sure if seal replacement is really necessary since brake temps are often twice that??

[Wil Ferch]

8 seals per caliper ?
How so? ...arew you counting both the dust seal and brake (fluid) seal for each caliper?

---Wil Ferch

[RACER911RS]

Yes Wil.
Each cylinder has 2 seals. 8 per caliper times for corners = 32.
I believe the seals are 30mm and 36mm. Could be wrong - going by memory.

I also said it was recommended to change the seals if you powder coat. If you already have the calipers off the car, and the seals are at least 20 years old, and now you are going to bake them in an oven ----- hmmmmm. Not my car.

Paul

[89911]

Your best bet is to leave the finish on them and just clean them up a bit by lightly blead blasting. Any paint is prone to chipping and it's kind of hard to keep brake fluid off of brake calipers. After a few miles the brake dust settles on them anyway.