Front wheels damaged from rocks stuck in brake…
07-10-2023, 05:10 PM
#31
For example. I Had a 1 ton diesel Denali, GM product. They used chrome side steps on it stock. After one winter the steps were all pitted and rusting all over the pits. GM took the steps off, said they will replace them one time only with chrome again or black. I went black and the problem was gone.
That is good customer service.
I think I might try cut a piece of foam or some type of material and adhere it to the caliper to keep rocks from entering this area.
That is good customer service.
I think I might try cut a piece of foam or some type of material and adhere it to the caliper to keep rocks from entering this area.
corrosion is patterned. I.e. the manufacturer can track and replicate the same issue, then correct with a design change like better sealing, different materials, etc.
apples to oranges as they say
dont take my word for it
try to get Porsche to cover it
07-11-2023, 11:52 PM
#32
Angryinch, sorry to hear about any damage to your car or wheels. But you seem to have several issues with the gravel on the roads you drive on. Maybe that is the cause of your problem and not Porsche wheel/brake design? I've not experienced any similar problems where I live, maybe you should move to Scottsdale 
07-12-2023, 01:32 AM
#33
Drifting
Thread Starter
Oh ya, its very common here this damage as I talk to more people. Anyone with large ceramic brakes stuffed into a rim with no clearance seem to have damage like this. Im in Canada so tons of sanding chips and rocks all over the place here. (I would love to move to Scottsdale lol.)
I told my salesman about it, he said they won't help with it. He seemed to know exactly what I was talking about, common issue.
What is bizarre is no solution to this. When I get some free time, ill search around online to see if there are any aftermarket solutions...
I told my salesman about it, he said they won't help with it. He seemed to know exactly what I was talking about, common issue.
What is bizarre is no solution to this. When I get some free time, ill search around online to see if there are any aftermarket solutions...
07-12-2023, 01:33 AM
#34
Drifting
Thread Starter
07-12-2023, 08:33 AM
#35
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My Chevy dealer replaced carbon ceramic pads and rotor on my 19' ZR1 because of rock damage, it happened a mile from the dealership when new, replaced and never another issue, never had it on my 8 porsche's so far with carbon ceramics
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Angryinch (07-12-2023)
07-12-2023, 08:50 AM
#36
Three Wheelin'
From what I gather, the damage to the wheel occurs due to a rock getting caught in the tight clearance between the caliper and the wheel. It sucks, but the expensive PCCB rotors are not at risk here.
07-12-2023, 10:51 AM
#37
Drifting
Thread Starter
Yes they are, rocks get stuck between the dust shield on the rear of the rotor and between the rotor, it makes an awful screeching sound. This is how I found out my wheels were damaged. I had the car jacked up on the front trying to find the rock.
As I moved the dust shield around, a little 3-4mm sanding chip fell out.
The issue is soft compound tires and tight tolerances between the caliper/wheel barrel and dust shield/rotor.
07-18-2023, 04:14 AM
#38
Yes they are, rocks get stuck between the dust shield on the rear of the rotor and between the rotor, it makes an awful screeching sound. This is how I found out my wheels were damaged. I had the car jacked up on the front trying to find the rock.
As I moved the dust shield around, a little 3-4mm sanding chip fell out.
The issue is soft compound tires and tight tolerances between the caliper/wheel barrel and dust shield/rotor.
As I moved the dust shield around, a little 3-4mm sanding chip fell out.
The issue is soft compound tires and tight tolerances between the caliper/wheel barrel and dust shield/rotor.
09-07-2023, 07:49 AM
#39
Instructor
Just saw this thread. I have a 991.2 TTS with PCCB that has the same kind of damage on both front wheels, predating my ownership. The PO was also in Texas, where we have a lot of crappy concrete roads with loose particles. Personally I am with @Angryinch in that this is a direct consequence of poor design decisions by Porsche combined with the apparent arrogance of not recognizing/fixing the issue for years. Yes the TTS is still an awesome car and yes the issue is primarily cosmetic, but it still leaves a bad taste.
09-07-2023, 11:58 AM
#40
Rennlist Member
Would going aftermarket wheels in 21 fix it?
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Angryinch (09-07-2023)
09-07-2023, 05:25 PM
#41
Drifting
When I bought my car, it was used. It had both front wheels scored like you have depicted. I took it to Porsche Of The Mainline in Pennsylvania. They did a courtesy, and painted some rough material in there that looked terrible and didn’t match at all. When I pointed that out, they said that’s what they can do. I was happy to pay for real Wheel Repair and I thought they had somebody that did those things. What I ended up doing was taking it to a separate shop that refinished and powder coated all of the wheels so that they would be perfect. It was well worth it in my opinion.
09-07-2023, 09:52 PM
#42
Drifting
Thread Starter
I was going to have mine fixed, but caught another rock. I have 3 rings of white scratches around one rim and 2 on the other side… probably will just leave it alone.
Without a solution to this design flaw, it’s only a matter of time before they get wrecked again.
21” would help yes.
Cup2s or any soft tire make the issue worse.
It sure is annoying. No one really notices, but it bugs me.
The caliper needs a redesign to keep the rocks from falling down in there and lodging in.
Without a solution to this design flaw, it’s only a matter of time before they get wrecked again.
21” would help yes.
Cup2s or any soft tire make the issue worse.
It sure is annoying. No one really notices, but it bugs me.
The caliper needs a redesign to keep the rocks from falling down in there and lodging in.
09-07-2023, 11:05 PM
#43
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Just got the same issue - a very deep scratch, all the way to the metal. It's a bummer but after a rub with polishing compound, it's practically invisible on my satin gray wheels.
Some relief is that rotors are safe - rocks that get stuck between the heat shield and rotor or between the calliper and rotor get crushed by rotor without damaging it. The rotor is harder than those rocks. I had plenty of striped on rotors from such rocks but all went away - it was transfer rather than a scratch. Also, scratches on rotors are completely fine, even though I did not have any permanent scratches in my 6 years with PCCB cars, and my cars were occasional visitors to gravel traps and even did an off-road rally in a Turbo S (991.2) once.
Also, it's not just 911 issue. My Cayenne Turbo has the same issue with 20" winter wheels. I solved it by never washing the winter wheels.
Some relief is that rotors are safe - rocks that get stuck between the heat shield and rotor or between the calliper and rotor get crushed by rotor without damaging it. The rotor is harder than those rocks. I had plenty of striped on rotors from such rocks but all went away - it was transfer rather than a scratch. Also, scratches on rotors are completely fine, even though I did not have any permanent scratches in my 6 years with PCCB cars, and my cars were occasional visitors to gravel traps and even did an off-road rally in a Turbo S (991.2) once.
Also, it's not just 911 issue. My Cayenne Turbo has the same issue with 20" winter wheels. I solved it by never washing the winter wheels.
