Hello fellas.

Looking for some input. I've noticed some rust on the wheel hub carrier (?)--I think that's what it is called. Only front left wheel is affected. Dealer says normal Porsche issue. Nothing to worry but can paint it and will most likely happen again. Car is NEVER driven in snow/salt. Weekend Summer cruiser. Thanks for the help. My OCD senses tells me to paint it immediately or I'm going to stroke out

 

Have those hats powder coated like STG did.

I'd say that's not normal. Push for replacement. Have them show you that same " normal rust " on their parking lot inventory.

 

That's iron oxide from the rotors laying atop that cad-plated area, you should be able to scrub it off with a stiff brush and some Simple Green, etc. No biggie. Do not paint it, because you will create a maintenance item with the paint. Best wheel brush on the market (for my money) is this you can buy on Amazon, its not flimsy and you can probably get in there without having to remove the wheel:

 

^thank you. I think I remember STG posting a thread about this--or I may be delusional. I think I'll go the route of powder coating them.

cheers

 

sweet. I'll give it a shot!

 

No offense man, cause I am a little **** about this stuff too, but looking at the condition of those wheels and you are concerned about a spot on the rotor hat??! Just sayin!

 

lol just pulled car out to wash it

 

+1

 

The rotor has fine micro-particles of iron on it, which is normal. When you wash the car, you are not drying your wheels inside the rotor area and that's a drip from the rotors causing that, basically a puddle of water on the rotor hat that has those iron particles contained in the water. One of the best things you can buy for your car wash regimen is the Metrovac Master Blaster - around $ 300 or so. Instead of towel drying, you blow dry and the jet blast is quite effective on this (much stronger than even the largest Stihl Leafblower). 15 seconds with this per wheel and there will be no water on your rotors to drip. You will still have a very light skim of rust residue on the rotor itself from the water, but that will disappear with first tap on the brakes. Better still, no swirl marks on your paint - ever - no towels touch the finish of the car. I've had mine now for 4 years - when it dies I'll buy another.

 

^I luv my MB. Maybe that's why my hats are just fine clean battleship gray.

 

A major reason for PCCB's, not cheap but the cars are not either.

 

thats the hat. I sand with 400 and paint with a matching color. I found a gray primer was a good match. You can also sand/clean the hat and the outer vent -which is the air passages around the whole rotor and paint them also and it will keep the rust off. may have to do this every year

 

Have similar stuff on my car. Porsche will NOT warranty it.

 

Perfectly normal. Porsche will not replace under warrant because there's nothing wrong with your rotors. If it bothers you spray a little WD40 on a paper towel and wipe off the oxidation. If you're feel lightheaded and are having chest pains, you can scuff up the hats and rattle-can them whatever color you want. They're just steel.

 

The part you are referring to is called a rotor hat. It is a simple matter to paint them or have them painted. For some reason, on the 2018 C4 GTS, the front rotor hats are polished aluminum and the rears are unfinished. I did not like the unfinished look so had mine painted.



In this shot you can see that the fronts are polished aluminum and the rears have been painted black.