Blakesmaster
Addicted to ArboristSite
The draft tube is ventilation if it gets plugged it will force oil to sludge and be pushed to any available escape such as rings! If it does not have air coming out with motor running it is plugged somewhere in its system!
My diesel mechanic told me of this the first issue we had and I did the "paper test" on it to see if it was steadily breathing or sporadic. I'm gonna check again tomorrow though. You got my brain thinkin' here. If it ends up a plugged draft tube I'm buying you a ####### monster steak rope.