Disc corrosion

[jasoncampbell1]

Hi guys More problems with the c2s had rear discs replaced 11 months ago just had mot done and Health check to find inside of rear discs fitted less than a year ago excessively corroded!! Yes live near the coast car is parked outside but so are two other cars that haven't had any problems with the same sort of annual mileage any advice would be very welcome
The discs were replaced with oe items too or so I've been told??

 

[jasoncampbell1]

No one with any thoughts of why how or which way forward?? Outsides are fine just inside pic looks quite bad too for something 11 months old??? Will try upload if anyone interested??

 

[Rodney Naghar]

The other two cars you mention aren't water cooled Porsches are they?

If you wash your car and leave it to dry naturally/live near the coast/leave your car outside - I'm not surprised (not saying it's acceptable mind you)

Either replace them yourself, get them skimmed, or bite the bullet.

 

[Lancerlot]

Fairly common for inner faces to corrode as they receive all the crud from the road, but unless they're badly scored or worn, it should be routine to get them cleaned off and a couple of hard applications of the brakes will face them up

Check the callipers are operating OK as seized pistons or sliders can result in one-sided rotor corrosion.

I doubt they'll be worn out after 11 months - more likely you're not using them enough! []

Regards,

Clive

 

[Rotorhead]

Skimming is the usual solution. Your OPC should be able to do it.

 

[jasoncampbell1]

Thanks guys will take a butchers for myself & see what can be done hopefully I dnt have to replace but have been recommended the opposite []

 

[ralphmusic]

Supporting Clive's view, these are inner and outer surfaces of front disks removed a couple of days ago, all dry weather from when I drove to OPC to have new ones fitted and since. Nice shiny outer faces, rust on insides, disks were 12 months old and had been exercised..

 

[spyderman]

They're actually not too bad - I've seen far worse!

 

[Lancerlot]

Yes, just light surface corrosion from moisture, which you can see has partially run over the surface covered by the calliper.

With steel rotors, it's a good idea to run the car up the road, lightly applying the brakes to dry then off, even if the vehicle is parked outside.

Light surface rust soon cleans off, but detracts from initial braking performance and does produce premature wear in the rotors.

Regards,

Clive.

 

[jasoncampbell1]

Personally am shocked I had a 10 year old mark 2 escort which had not turned a wheel in 6 months after running it down the road the discs were like new and they had never been changed wife's q7 is a year older done less miles still on first oe discs that car weights 2 ton and no corrosion at all and they're still like new.......
I do however except they're made of high iron content steel to prob brake better but not exceptable that they last 11 months after paying out £££ for genuine porsche parts!
On a plus note my local porsche dealer is going to open a warranty case so will keep you all posted!!