Restoring a set of Turbo Calipers

[KTL]

Those that have seen a complete seal rebuild kit from Porsche/Brembo can attest to the kit including four things:

-Square cut pressure seal
-Dust scraper or boot
-Hard anodized piston
-Packet of grease

More recent kits i've seen have Kluber grease in them. Which is basically the same type of Sil-Glyde silicone grease that Shaun uses.

This grease helps get the pistons into the bores w/out hanging up on the pressure seals. The pressure seals are purposely shaped with a square cross section to grip the piston and retract it a tiny bit after you release the brake pedal. That tight fit & grip on the piston swipes off brake fluid and makes for difficult sliding of the piston within the seal. The grease is a MUCH better lubricant for inserting the pistons into the seals versus plain brake fluid.

I got some Centric brand seal kits (seals only, no piston, no grease) for a set of 964 calipers and they were a real bear to get the pistons inserted. I totally whiffed on using the grease I have on the shelf (mine is a tube of Dow Corning 111 that I had on bought for oil return tube o-rings years ago) and damaged the pressure seal pushing the piston in place.

[Racerbvd]

Wow, those look awesome, I too have a few sets, maybe we can do some horse trading.

[911 Rod]

You have set the bar very high here!

[Shaun @ Tru6]

Another set of Turbo calipers done. These were the roughest set I've gotten so far. We ended up replacing every single piston. They turned out well for a very special car.

[Shaun @ Tru6]

[Geronimo '74]

Originally Posted by 911tracker85

Geronimo, do you mean THIS 32C? I do not recall getting a member #.
sadly I sold it last year, hated to but needed funds for my 930 project.

Yes, that's the 32C I mean.
Had to ask for my number after I saw a few members post their's. I did not receive it initially.

Window of my office-container on the construction site.
Too bad 32C never gained enough momentum.

[NY65912]

Beautiful work Shaun!

[RWebb]

I bet valve covers would look nice with that gray coating...

[JacobS911]

Eye candy for sure! Still hunting down a passenger side big fin so I can send mine out to you guy for this restoration! Keep up the great work!

[Shaun @ Tru6]

Originally Posted by NY65912

Beautiful work Shaun!

Thank you Mike!

Originally Posted by JacobS911

Eye candy for sure! Still hunting down a passenger side big fin so I can send mine out to you guy for this restoration! Keep up the great work!

Thank you Jacob, I'll be here.

[H-viken]

Shaun, how hard do you tighten the 4 M12 bolts that hold together the calipers?

Cheers!

Johan

[Shaun @ Tru6]

Johan, from memory, it's 60 Nm, but please confirm that with a factory manual.

[MIAdragon]

Ballpark cost?

[H-viken]

Originally Posted by Shaun @ Tru6

Johan, from memory, it's 60 Nm, but please confirm that with a factory manual.

Thanks Shaun, will see if I can find a manual

Johan

[Shaun @ Tru6]

Originally Posted by MIAdragon

Ballpark cost?

$1100 per pair Dragon

Originally Posted by H-viken

Thanks Shaun, will see if I can find a manual

Johan

I will look on Monday Johan.

Make sure your pistons are in the right orientation before getting them together.

[H-viken]

Thanks Shaun

Dragon, I can tell you that the parts alone, needed for a full refurbishment, aren’t cheap. Ask me how I know

[H-viken]

I ordered 00004302000 and got Castrols Mollub-Alloy Paste TA. Can this really be the right lube to mount the pistons in the bores? Seems pretty thick

Johan

[KTL]

No that paste is anti seize lubricant for fastener threads. It’s not for use in lubricating piston seals. Piston seals use a silicone paste

[Racerbvd]

Anything I can trade you to do 3 of my sets?

[H-viken]

Originally Posted by KTL

No that paste is anti seize lubricant for fastener threads. It’s not for use in lubricating piston seals. Piston seals use a silicone paste

Thanks Kevin, that’s what I suspected. It doesn’t like right coming out of the tube

Johan