Replace pads *and* rotors?

[MNBoxster]

Hi,

If the Discs are cross-drilled, these cannot be machined. with only 40k km, they shouldn't be below the wear limit, but they cannot be turned true, so replacement would be warranted...

Happy Motoring!... Jim'99

[berj]

Originally Posted by MNBoxster

Hi,

If the Discs are cross-drilled, these cannot be machined. with only 40k km, they shouldn't be below the wear limit, but they cannot be turned true, so replacement would be warranted...

Happy Motoring!... Jim'99

That was my first thought. But they're not cross-drilled. And what's more the dealership didn't say that they were worn.. but that they simply *had* to be replaced at the same time as the pads because that's how they were designed.

[MNBoxster]

Originally Posted by berj

That was my first thought. But they're not cross-drilled. And what's more the dealership didn't say that they were worn.. but that they simply *had* to be replaced at the same time as the pads because that's how they were designed.

Hi,

Never heard of that... sounds like some Bill padding to me. Have your friend look up the wear limits for the discs...

Happy Motoring!... Jim'99

[berj]

Originally Posted by MNBoxster

Hi,

Never heard of that... sounds like some Bill padding to me. Have your friend look up the wear limits for the discs...

Happy Motoring!... Jim'99

Excellent. Thanks Jim. I'm going to do more digging. I just wanted to find out if there was any truth at all to this.

[EPIQTodd]

Cross drilled can be machined, but that doesn't matter in this case either way. The only time you need to replace the discs is when they are below the minimum thickness - the hats should have a measurement of what the minimum thickness is, and you can check the thickness with a caliper. If they are heavily pitted, with a significant lip on the edges of the rotors, they need replacement. Normally street pads over 40,000 km wouldn't need to be replaced just yet...

[MNBoxster]

Originally Posted by EPIQTodd

Cross drilled can be machined, but that doesn't matter in this case either way. The only time you need to replace the discs is when they are below the minimum thickness - the hats should have a measurement of what the minimum thickness is, and you can check the thickness with a caliper. If they are heavily pitted, with a significant lip on the edges of the rotors, they need replacement. Normally street pads over 40,000 km wouldn't need to be replaced just yet...

Hi,

Cross-drilled Discs can be machined, but it's not advisable. The potential for cracking is too great once additional material is taken away.

Many shops simply won't do it. This is because the Discs can crack on the Lathe, or it damages the Blade, or the shop simply doesn't want to assume the liability. Personally, I would never have them machined, their integrity cannot be assured after that, and they're a fairly important part - too important to have them fail...

Happy Motoring!... Jim'99

[Brucelee]

Easy to find out.

If they are solid, they use a micrometer to check the thickness and for warp.

If thick and true, lathe away.

However, Porsche dealer won't work with you like this in my experience. Need a good indy break guy who isn't trying to gouge.

Good luck.