All of a sudden my RS has this loud grinding noise when:
- turning right forward slowly.
- turning left backward slowly.

Did not try to drive over 5mph.

So loud that can't figure out where it comes from!

Seems fine going straight!
Seems fine on brake.

The sound progressively getting worst in just couple minute!

Also find a half inch groove on the rear left brake rotor, but the sound doesn't seem come from there!

Any idea?

 

Found the problem:

 

Looks scary. What exactely is broken?

 

The bearing worn out, then the wheel started moving very slightly and touch the caliper slightly.

The bearing totaly worn out in less than 40km.

Never track the car, only 13500km on the clock, not aggressive drive style, all factory spec..

 

Not good, but it is a bearing and from time to time there are bad ones. Good thing you found it early.

 

I've seen that before and had to replace a left rear bearing on a GT3 RS 4.0

 

Does Porsche buy BEARINGS from China?

 

did u end up paying for it or it's under warranty?

 

I have to pay for myself, as:

1. I have FVD header + GMG X-pipe, P factory won't honer the warranty, unless I re-install the OEM parts.
2. If I re-install all OEM parts + wait for the P factory, it may tken over one month for the warranty process.

Guess what, P center still on holiday.

I will call them on 3rd Jan.

 

That sucks, as if the exhaust mods effected the front bearing.

 

Porsche is pretty crazy about mods these days. Seems just about any mod voids a warranty claim around Center Locks. =(

 

I believe you speak from experience Geoff...didn't you have different wheels on your 997.2 GT3, and that was the basis for the claim denial?

 

Yes (GMG wheels), that and being driven on the track. Though as far as I can tell the wheels are to porsche spec, were torque to the latest spec and were of the same dimensions as stock wheels.

Interesting they also mentioned being serviced by a non-porsche dealer (all the required maintenance was done by a dealer including the original CL recall, other maintenance was done by a local porsche specialist). AFAIK this basically says do your own or use a non-prosche dealer and risk you warranty.

Honestly on sure how much of this is actually legal (I have consulted an attorney). The conversation always comes back to how much do you want to spend to fight it. Even in arbitration (as required by the warranty) you would need to hire experts to state why the aftermarket products are within the Porsche spec and likely the manufacture also (which maybe a problem if they do not want to go against porsche).

All in all changing anything on a GT3 is asking for trouble from a warranty standpoint.

 

Yes, all BS until a class action suit comes through.

As for mods and warranty, I remember asking my local dealer about coolant welds, they told me that it would void the engine warranty. The agreed welding was the best solution, but could not cover it if another failure occurred. Porsche does make some nice cars, but also has some issues. Sorry for your issue, hope it works out for you. My car doesn't have a warranty, so I can mod away as I want.

 

It's the rear left bearing.

Exhaust mods shouldn't affect the bearing, right?