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996 Disc Corrosion

Rotorhead

Rotorhead

PCGB Member
Member
Just took my 996 for its MOT and it failed - due to "completely corroded inner rear discs".

The car is an 02 C2, OPC maintained and has only covered 10,400 miles from new. The MOT tester said he was very surprised because in every respect the car is in such good condition, and the front discs and outer rear discs were fine.

Is this a known problem?
 

ORIGINAL: oliver

Just took my 996 for its MOT and it failed - due to "completely corroded inner rear discs".

Is this a known problem?
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Well it won't be by PCGB even if it is [:D]

Surely you must get this done as a goodwill claim on such a low mileage well maintained example ... Good luck getting a satifactory outcome let us know how it all pans out
 
Oliver

I think this can be a problem if the cars breaks get wet from either the rain or if you wash it before leaving it for a while which with your current millege sounds like you do. I had a similar problem on my car, always a good idea to dry the breaks off by going for short run before storing it.

Phil
 
Apparently it is a known problem on cars with drilled discs that do a low mileage - particularly if left standing in a garage after cleaning. There is a warning about this in the handbook.

Even going up and down my drive (200m) isn't enough to dry the holes in the discs. Hopefully a re-grind will fix it.
 
It is a bit poor that we can leave a £500 runabout on the drive without worrying about the disc corroding and yet you can't with a Porsche.
Is the the price we pay for performance or something else [&:]

garyw
 

ORIGINAL: oliver

Apparently it is a known problem on cars with drilled discs that do a low mileage - particularly if left standing in a garage after cleaning. There is a warning about this in the handbook.
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Is this a known problem on your CS too or just on the latter cars [&o]
 
All cars can suffer from problems through lack of use. There was a year when I hardly used my RS and some corrosion occured on the brake pistons which led to damage to the rubber seals. The answer is to use them.

However, my 996 is used regularly. Only occasionally does it get cleaned then left for a few days or more. I will take issue with Lovetts, but I can see the problem.
 

ORIGINAL: oliver

All cars can suffer from problems through lack of use. There was a year when I hardly used my RS and some corrosion occured on the brake pistons which led to damage to the rubber seals. The answer is to use them.
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Well sticking to Porsche experiences my ex Speedster saw 11500 miles in 14 years and never any issues at all with the car including the 1989 Spec Turbo Brakes [&o] Thats why I find these low mileage horror storries hard to relate too! I have apparently abused through lack of use :ROFLMAO: more cars than I care to recall over the years and never once had a wear and tear issue through lack of usage [:eek:]
 
and Boxsters. So much for the apparently superior steel used in OE discs compared with Zimmerman..........or perhaps they would disintegrate even quicker.
 
I believe the expression used is "sacrificial".... bit like all the money wot we spend on the cars!
 
Also a problem with 944s/968s.

Corrosion problem can also extend to the handbrake drum necessitating replacement of the discs even if they themselves are ok.

 
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