850 EGR (Exhaust Gas Recirculation) Cleaning w/ Pictures.
The big issue was smoke coming up through the oil dipstick tube despite a PCV replacement a couple of years ago by the previous owner. He didn’t know what an EGR was so I suspected it was totally clogged up. Below you’ll find pictures and an somewhat of an explanation of what I did and what you will need to do if you’re in the same predicament. Unfortunately my dipstick tube still smokes (not as much but still does) so I’ll have to tackle the PCV some day soon.