987: Gen II 2.9

[911hillclimber]

Passed the MoT today, but was invited down the pit (nice village old skool garage) to see the corrosion on the inner faces of the two front discs.....
These are not old, 2 years and 10K miles. Outer surfaces perfect, rears perfect all round.
Brakes certainly work on the rollers etc, so all safe, but the tester said he sees a lot of modern Porsche's with this fault.

OEM discs and pads are about £200 from Type911, but are there any discs that are more resistant to this condition anyone has experience of?
Graham.

 

[CLIFFWILKINS]

Very common with Porsches inner rust on the discs putting it away after a wash can do this or wet weather or simple lack of usage.
Trying braking hard from high speed obviously legal speeds a good few times it should clean them up.

 

[Gordon Attar]

Very common fault from not using the sports cars enough for what they were made for I. E.faster driving and heavier on the brakes, tbough its more usually the rears. All Porsche's since the removal of lead from the discs suffer from this you just need to get on the brakes hard occasionally to keep.them clean. In fact half a dozen fast braking events will.probably clean yours.

 

[911hillclimber]

Suspected so. The disc faces on all 4 surface rust very quickly even when the car is not washed.
It is difficult to 'thrash' the car in the West Midlands area and the wife is usually with me so a lot of drama is not possible, but will give the car some heavy braking soon.
The inner disc face is very exposed compared to my '73 911, but the car gets washed, left to air dry and sleeps outside and used once a week or 2 even, so everything against it.
Having said that the rear inner faces are perfect, saw them today at the MoT.

Other thing was the car is oil free underneath!

 

[pncarrerars2]

In my opinion the discs fitted to some performance cars are not fit for purpose and appear to be made from a sintered rust/salt mixture. Dealers make the excuse of the change of material since asbestos was removed from brake pads but this is not true. For example the discs on my Skoda are fine when left unused for a week but the ones on my Golf R are nearly scrap by the morning when left overnight. I think that you would be wasting your money replacing them with Porsche discs. I have found that even the standard EBC discs (as sold by Design911 and others) are much cheaper but more importantly much better quality. The last set that I bought are properly painted with a thermal protection paint and do not rust away like the oem ones.

 

[911hillclimber]

Interesting, I have a 3.5 year old Skoda Superb as a tow car/daily etc and the discs have a light rust on them that comes off after a few light applications of the brakes, 42 K miles and the brakes are perfect, front and rear. Car sleeps outside and gets washed as much as the Boxster.
Mind you, the whole car is 'Superb' too. Brilliant car.

 

[pncarrerars2]

I agree, modern Skodas are great cars. A similar specced VW would have cost about £10000 more than the Skoda but the Skoda is better built. For example under the bonnet on VW is just base coat but on the Skoda finished off with
lacquer. Back to rusty brake disks. I did everything in my powers to keep my golf discs free from rust apart from removing them at night and storing in a dehuminified box. I always dried them after washing and regularly used the brakes hard. End result, rear discs scrap after 23000 miles.

 

[DrSimon]

Skoda owner here too. I have an Octavia VRS estate as the family workhorse. Miles cheaper than an Audi or VW, but the same car underneath. I've had two now and they're absolutely bullet proof.