Brake Discs

[Dylan1]

take it to an indy for "independent"advice-i did and saved myself several hundred pounds

 

[iankwilson]

I'd appreciate your views on this. I took the Cayman up to Colchester OPC (or Colchester on Sea as it was on Saturday) for the clinic session arranged by Essex region. During the inspection the technician noted some corrosion on the inner surface of the front discs and suggested they are skimmed (£211 per axle) to avoid the risk of deterioration to the point where it will need the discs replaced.

I think I'm ok to follow what sounds like good advice, but what do you more experienced owners think? To be fair, I've not done much mileage at all in the last 3 or 4 months so the discs are not exactly in daily use, but it still seems a bit early in life for this to happen.

Any thoughts?

Cheers.

Ian

 

[InnerSphere]

Three thoughts come to mind 1) Does the car sit outside? If so, rain + splashing + not much use = corrosion of the utmost degree - Porsche discs are made of metal that is very susceptible to corrosion. Great for braking feel - bad for longevity if not properly looked after 2) Do you take the car for a spin after washing it? You need to do this to get rid of the water - or they corrode - see above This is particularly true if you don't use it often. 3) Agree with Dyllan if you want to save cash hth, Graeme

 

[Black80XSA]

Take the car out and give it some hard stops in a safe location from high speed - You'll need to do this numerous times. Sound advice above re driving the car to dry the brakes straight after washing.

 

[Alex Postan]

Normally, a bit of left foot braking against the throttle will dry discs just like that BUT nanny Porsche has an interlock that cuts the power on the Cayman if you try it. I asked my OPC if they could disable the code in the ecu but they indicated that it was not possible. Nuisance!

 

[dereksharpuk]

Alex, I never knew that! I have tried left foot braking to dry my discs and wondered why the car stalled despite sizeable throttle input. However, despite the price, I may consider PCCB on my next Porsche; not for less unsprung weight, but to help prevent brake disc wear and that wretched brake dust.

 

[berty987]

At a 5k plus premium and no guarantees of the discs not cracking i think i would stick with the iron option. You can get new OEM quality discs from Marque21 on e bay for a little over 200 pounds the pair. After skimming the discs will have a shorter life anyway , especially if the old pads are retained. The discs have a limit of 2mm wear before being scrapped , so they only last about 40 K miles tops. Buy some zinc primer or a cadmium bath plating kit and the inner surfaces of the disc (inside the vanes) should not rust as quick, leading to the corrosion issues. I was under the impression that the cross drilling and corrosion coming out from the holes is the main issue on discs used infrequently.

 

[johnk]

you can get original discs for £200 an axle from euro car parts or sebro discs which are oe for a little less

 

[Gary C]

Sounds to me like income generation by the dealer. All discs corrode at a greater or lesser extent. My polo discs are brown after a day in the carpark at work when the wind is blowing from the sea. If its on the friction surface, just use the car. If its not on the friction surface, dont bother, skimming will only increase the rate of metal loss to corrosion.