Quote:
Originally Posted by Whitespeed
The root cause for the majority of cases has been identified as improperly torqued lug nuts from the factory along with a film of grease that they were applying between the rotor face and the wheel hub (which they've hopefully stopped doing).
|
Ironically, that grease was probably applied to minimize corrosion at that location while the car was being transported.
Quote:
|
The loose, lubricated interface causes the wheel to shift around under cornering loads and from my observations of shiny spots on the hub pilot, the ticking noise is coming from the wheel striking the pilot as the wheel shifts around.
|
That's great tech! It's also pretty scary. It means that wheel is also putting shear loads on the studs, which is an invitation for stud failure.
There is a
TSB for this, and it says to clean everything thoroughly including the use of Scotchbrite pads. Then put a film of lube on just the hub pilot, and reassemble. I wouldn't even bother with the lube on the pilot: there is no reason the wheel should ever move on the pilot if the mating surfaces are clean and the lug nuts are properly torqued.