I was investigating steering rack play on my car. Found out my inner Tie rods was worn out. However I noticed allso a lot of corrosion (see pictures) on the teeth on the rack. Do anybody experienced this? Any advice what to do with it or leave it as is?
The car is a E60, 2004, 520IA

 

Looks like your system needs to be flushed real bad. Its not rust its sludge.

 

You mean flush the servo oil system? Didn't think that the servo oil is in contact with the teet and pinio?

 

I have no idea what the servo oil system is. I thought we were talking about the rack and pinion which is the steering system.