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Turbo Cayenne -08 (957) Brembo brake caliper piston size


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Started to change new discs and pads to front. Of course both sides have one piston which are more or less not moving properly. Actually driver side has one totally stuck piston which has to be replaced... Anyways, Brembo doesn't sell any repair kit for these and from local Porsche dealer You can only buy totally new caliper. Haha, not a problem if you have on extra 1000 euros in your pocket...

Does anyone know the length of caliper piston? Dust cover has marking 44 so definitely diameter is 44 mm but what might be the length? And is the length same with all 6 pistons?

I have started to notice that with this car it's better to reckon with enough spare parts before starting anything than notice during the DIY job that you need something...

 

 

Front_caliper1.jpg

Front_caliper_pistons.jpg

Edited by pilhaus
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Use lots of penetration spray such as WD40 around the pistons, then use a G clamp to secure the free moving pistons . Or wedge them with a piece of wood. Then have someone inside the car press the brake pedal and try to pump out the piston against another piece of wood. Keep working the piston until it's free moving again.

Sent from my SM-G935F using Tapatalk


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Thanks Angusc for tips, but after all that is not the problem at the moment. The problem is not shown in the posted pictures but I can add one of that piston what really is stuck. Somehow the dust cover has been missing from it and you know what it does for the surface of piston...

 

In the end the caliper can be even 'opened' or make it to half pieces. That's another story can you ever make it a functioning caliper anymore...

Btw, I tried already to get this out with the tools what I have at home garage and with means not to break anything more. Have to admit that it's really stuck.

 

At this point I refer again to my original post; I just would like to know the length of one caliper piston and is the length same in all 6 pistons?

That one piston has to be replaced anyway so I need to order the part before DIY work continues...

 

Stuck_piston.jpg

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