westgate997

Hey Gang,

Every time I wash my car, when driven immediately the centrifugal force is depositing this strange gunk on my wheels, both inside the barrels and on the outside rim area. What is this crap? I had just used a wheel brush to clean the insides of the barrels. I do use a pressure washer am I driving grease out of the bearings God forbid??? :bang head:

Thanks!!
Tim

Alex 911

Use a leaf blower to dry out your wheels

rickdogg82

Rust from the rotors mixing with residual water?

Techbod

Fronts, rears, or both?

Buddhamonk

dog poo inside the wheel well...

wildwill

I have the same issue. If you wash the car and immediately put it in your garage you will have this issue. I drive the car around the block to get the water to dry before putting the car away. I think the water collets in the vented rotors and needs to be dried before storage.

Spinout

It looks like it could be grease but also rust depositing on the rim.

Is it sticky like grease?

westgate997

It's mostly in the front. I suspect that it is a mix of brake dust and rust mobilized by the water. Kinda greasy though which is strange. Hard to get off.

westgate997

Assuming you're not pulling my leg, is this as opposed to the high velocity of compressed air? Maybe a more "gentle breeze?

AWay

This also has always bugged me, but I'll admit it's no where near as much gunk as that! As others have stated it's likely a mix of water/brake dust residue coming out of the rotor vanes. My 'solution' has been to roll the car slowly to get full rotation of the wheel (after it's washed but before dried) and this lets this gunk fall out of the rotor vanes into the wheel. Then simply hose it out of the wheel before drying. Effectively no residual gunk!

wc11

It's just dirty rusty water from the discs. Happens every time I washed the car.
It's in the vent and cross drill holes.
So now it's either go for a drive after washing and before polishing to clean out the water or wash after a drive when the discs are hot.
Generally though, I find no need to directly spray the discs.

westgate997

Thanks AWay, I'll give that a "whirl!" (sorry)

JayRace

As others have stated the best way to solve is driving the car immediately after washing. This is from flash rust that forms on your rotors after washing. Seems to be worse on the Porsche rotors than my other cars.

Marine Blue

Your hunch is correct, water gets into th drilled rotors and sits. The rotor surfaces then rust and as soon as you start driving the water, rust and brake dust is thrown into your wheels.

As others suggested, use a leaf blower to dry the brakes. You'll still get a light dusting of rust since the surfaces will still be prone to it but it will be far more manageable. Alternative is to not use wheel cleaners or water when cleaning wheels and just stay on top of it with quick detailer and old microfibers. I've been doing this for the past four years and the wheels still look perfect with exception to a few rock chips.

Alex 911

Not pulling your leg. I never used the blower on the Range Rover but with the 911 I use it after every wash and it almost eliminates the problem. I figure compressed air would work too but I just use the blower.