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I dug into the story with the wear circles a while back. Just being able to see them is normal, even on new disks, though on some they blend better than others. They are supposed to pit (turn rough) before the rest of the disk. So as long as they appear to have the same surface, you have not triggered that indication.
Would you be able to tell me where I can find where it says this? Im not disagreeing at all but Id just like to be able to show it to the guy who at the shop who told me my PCCB's need replacing. He told me as soon as you see the circles it means they need replacing and has maybe just misunderstood
In the meantime Im gonna try and track down Total 911 -- issues 48, 49, and 50
Originally Posted by MadScience
Thanks for the info on the tool! Did some searching, ordering some for the turbo, cheap enough...
Can I ask where you ordered the tool from (can't seem to one for the 5 bolt wheel, tried Suncoast too)
Originally Posted by Macster
From the factory Turbo service manual I have the disc thicknesses and wear limits.
See attached PDFs....
Macster thanks again. Your posts are always so full of knowledge
From what _I_ decided was the best info I could find, that's what a worn wear indicator should look like. Now, that's only one type of wear. Generally, the amount of disk life left is indicated by weight. (Or apparently also thickness, but I seem to recall that having some sort of issue.)
Do take my info with a grain of salt, I'm just a (german speaking engineer that's a) customer that tried to figure this out for themselves.
From looking at the pictures it just seems like the ceramic layer is thinner in those circles, and when they go, the rest of the disk should no longer be considered safe...
Supposedly... The 3 circles have different thickness. When all 3 done, rotors are suspect. Dealers have a tool they can use that electrically examines the rotor.
29k unless you've tracked the car those rotors are fine.
I've always pulled mine very carefully after stuffing a bunch of towels in there. Slight pain, but seems to work out OK.
I also would not consider handing this car to a random tire show without very explicit instructions, and an understanding that they would replace a disk they broke at their cost.
The problem with tire shops is they do the tire job the same way every car. The car goes in the air and the tech loosens the lugs and off comes the wheel. He'll go around the entire car and remove all the wheels/tires. Then off the tire changer station they go.
He will not stop to after have loosened the lugs remove one or two and install the rods before removing the other 3 lugs and he will not do each wheel individually.
IIRC cars with PCCB's from the factory should have if not two at least one of these wheel stud rods in the car's tool kit.
IIRC I think my 2003 Turbo came with one and it didn't even come with PCCB's.
You can pick up the items easy enough. I bought a 2nd one for at the local Porsche dealer parts department. Don't recall the exact cost but it was not very much at all, probably under $20. If it had been more I would have remembered.
IIRC cars with PCCB's from the factory should have if not two at least one of these wheel stud rods in the car's tool kit.
Cheap enough to replace, but they were MIA on my car which shipped with the PCCBs installed. I suspect they were tossed aside when the spacers (with studs) were fitted.
And even that is arguably usable as emergency spare. Some pics have entire top surface delaminates.
I really wonder why my local P Specialist would tell me they're on the limit then. These guys have been around for ages and have a good reputation and surely wouldn't lie about something so blatant ? The tech who told me was also very experienced, having previously been a service manager at a dealership
Cheap enough to replace, but they were MIA on my car which shipped with the PCCBs installed. I suspect they were tossed aside when the spacers (with studs) were fitted.
No guide studs came with my vehicle, had to buy two at $40 total CDN (about 32 U$). Since everything else is there and the car is 100% stock I have to assume they were not included when the 2010 car was built with PCCBs.
I believe that when I read the manual it says to use the guides for PCCB but infers they are not supplied (same for the jack and wheel nut wrench).
09-11-2016, 05:55 PM
