I decided to replace the power steering cap o-ring as it looks like it has been leaking.
I also noticed the oily mess on this pipe near the AOS. (AOS was tested about 2500 miles ago and was OK.) Any ideas where this mess comes from or is it just normal dirty engine grime? Also what is this hard plastic tube for? (I wiped off part of it & that's why it looks clean/shiny).
Thanks.
