VW 3.0 TDI

[Rawze]

#1 cause of turbo leaking oil into CAC or exhaust is excessive crank case pressure, not the turbo face seal. Sure the seal wears over time, but it should typically never leak unless something causes it. Most common causes are either crank case pressure, or a vacuum at the intake manifold of the engine due to various reasons.

Also, if the crank case is ventilating into the inlet of the turbo (a lot of euro cars are designed this way as "no oil fumes" emissions garbage rules) ... then that is the FIRST THING that has to go!. Vent it to atmosphere (unless your in one of those countries where its illegal ehemm). - That is one of the worst things that you can do to a diesel engine!... and especially so, if it has EGR on it. .. ans the pi## poor excuse of 're-burning the fumes' is just that!. An unmeasurable excuse that is NOT worth trying to reclaim vs. all the nasty gunking up of the turbo, CAC, intake, and valves, killing off the intake flow, dropping fuel mileage greatly over time + other issues as a result.

just my own thoughts, .. the beer is talkin'