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cracks in handbrake surface

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While chasing down a rattle I popped off one of the rear discs off and was surprised to find cracks in the handbrake shoe surface. Should I be worried? Discs are perhaps 4 years old with 4K miles? And no, I don't drive around with the handbrake on!

 

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It’s not good. In the event of brake failure you would be relying on the e brake to stop the car.

if this part of disc is faulty how do you guarantee other parts of the casting.

On the scale of things brake discs are relatively inexpensive parts.

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I'd change them, you don't know how far the crack has propagated internally.

I've never checked mine in the whole of the 13 years I've owned it.  Best add that to the list.

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Not quite the same thing but a guy I know decided to save money on a new disc and run a cracked one on Spice Group C car at Monza! The damage when is broke cost more than £10K and incliuded repairing the monocoque!

I think I would replace them all.

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OK, will swap them out. They were Pagid discs from Euro Car Parts. Will try Sebro discs.

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Had same issue on genuine Porsche discs which I think had been on my car since new 88 Targa 52k miles evident on both sides and in two places 180 degrees apart. Most likely caused as a result of the car parked with handbrake on for long periods of time with car seeing little use.

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