Are these Brake calipers normal?

[Bobton125]

Gen 2 987 Cayman 2.9

I took all the calipers off today.

I noticed only on both front calipers there is a thin metal plate screwed into the piston on each pair of pistons.

I've never seen Porsche Brakes before, is this normal? If not, any idea why somebody would have done this and should i keep them like that? They worked perfectly fine before taking them off.

(i'm trying to upload pictures but it says to try again later)

[Bobton125]

Yes they look exactly like that shape on those in the link

So they came out the factory with those on then i presume?

Never seen these before on calipers, glad they weren't a bodge a previous owner has done

[Bobton125]

Am i able to re use them? If so, do i need to put a grease / adhesive on the back of them?

[Bobton125]

Thanks Slippydiff..

For when i refit with the old pads, what would be the best option with these? Put the pads back in how they were? Put Copper grease on the back of the pad?

Edited by Bobton125 on Monday 20th May 23:27

Edited by Bobton125 on Monday 20th May 23:29

[Bobton125]

Slippydiff said:

Those are the original anti-squeal shims.
If you’re using the car for a lot of track work, leave them out altogether or buy a set of stainless steel or titanium shims. There are several suppliers for them (Design 911 in the UK stock them)

If the car is used primarily for road use, remove the old shims and fit a new replacement set.
It’s ages since I fitted a set, but IIRC the lugs on the back of the shims either just slide into the open end of the caliper pistons (ensure the pistons are fully retracted back into the caliper if you’re fitting new pads, otherwise you won’t get the shims in) or they clip in, having slid/clipped the shims into the end of the pistons, you then tear of the adhesive backing material on the front of the shims to expose the adhesive that sticks the front of the shim to the back of the brake pad.

Edit to add, the screw heads you can see on the front of the anti-squeal shims, secure the lugs to the shims, they don’t fasten the shims to the pistons

Edited by Slippydiff on Tuesday 21st May 07:30

Thanks for this. It is for road use only.

I have bought some replacement ones to stick on for when i put the pads back in.

I'm used to putting copper grease on the back of pads before fitting them, is this needed on the fronts shims or the backs at all? The rear does not have these shims

[Bobton125]

ok, should i grease the lugs that go into the pistons?

Also, should i grease the back of the pads for rear calipers? these have no shims

Edited by Bobton125 on Wednesday 22 May 10:11

[Bobton125]

ok great, what grease do you use?