Brake rotors question

[tolum]

Hi guys;

Winter is over so I did put back my 2003 Boxster 2.7 on the road. Prior to that I did check the rotors depth. Any body can confirm if I have to plan a change out in the near future: Here are my readings (electronic caliper):

Front: 23.4mm & 23.2mm

Rear: 19.7mm & 19.5mm

Thanks for your help.

Thierry

[Loren]

Brake disc thickness New

front 24mm

rear 20 mm

Brake discs Minimum thickness (after machining)

front 22.6 mm

rear 18.6 mm

Brake discs Wear Limit

front 22.0 mm

rear 18.0 mm

Thickness tolerance of the brake disc, max. 0.02 mm

Lateral runout of the brake disc, max. 0.03 mm

Lateral runout of the wheel hub, max. 0.03 mm

Lateral runout of the brake disc when installed max. 0.06 mm

[black_box]

Has anyone ever had their crossdrilled rotors machined? Mine are a bit grooved, and I'd like to freshen them up and change pads for summer.

[Loren]

Yes. they can be machined as long as the result exceeds minimum thickness specs.

In many cases machining will not leave the rotors within minimum specs.

[tolum]

Thanks Loren, so seing your numbers I'm at half way, so doing 2000 miles/year, I will be ok for a few years...

Thierry

[Loren]

Thanks Loren, so seing your numbers I'm at half way, so doing 2000 miles/year, I will be ok for a few years...

Thierry

"Theoretically" yes.

But I would still check them yearly.

And, one trip to track can put the equivalent of 5000 miles on the car.

[jim_hoyland]

Question: do rotors have their thickness stamped onto the rotor ?

[Loren]

13 minutes ago, jim_hoyland said:

Question: do rotors have their thickness stamped onto the rotor ?

 

Not that I recall.