Just noticed how fast and badly the brake disks on my wife's XK8 rust.
Are there alloy disks available that would work and not rust like these?
Or should I just spray them with CRC like my sister-in-law did
(lord rest her poor soul) ?

 

Driving occasionally will take care of the rust.

 

(I'll assume this is a serious question)

Regular brake discs are steel and light surface rust is common wet areas after the vehicle has been standing for a while. It should easily clean up with running the vehicle a short distance.

Pitting or heavy surface rust could be an indication the calipers are not moving freely.

No lubricant of any kind should be used on the disc faces. It will seriously affect braking.

Graham

 

Agreed. Just drive it. That will keep the brake rotor rust at bay. As previously advised, do not spray any chemicals on the rotors. That's a severe safety hazard....

 

Well, the first part was serious anyway. The disks do get some surface rust much more rapidly than is apparent on the other vehicles in the driveway.
The note about my sister-in-law was of course in jest. However, her mechanic did ask her one time if she wanted the brakes greased while he was doing the seasonal air change in her tires. (true)

 

The mechanic gets the last laugh on that one.

Caliper pins / pad backplates on disc brakes and expanders on brake shoes do need special high temperature brake grease. So does the Yoke on an XK8/XKR handbrake.

Graham

 

I used to drive Dealer Trade Cars for a Cadillac Dealer. Some brand new cars had rust on the Brake Discs resulting in a Pulsing Brake Pedal.

This was known as "Lot Rot" and required re-finishing during New Car Setup.

 

Graham

 

Jaguar OEM brake disks are ductile iron and are going to rust fast outdoors. As was said, driving will remove it.