black markings under valve cover?
black markings under valve cover?
hi,
i was changing my oil the other day and when i peered in the oil inlet opening, i saw these "black markings".. see images below...
anyone have any ideas what might have caused that or if it is normal?
thanks
i was changing my oil the other day and when i peered in the oil inlet opening, i saw these "black markings".. see images below...
anyone have any ideas what might have caused that or if it is normal?
thanks


