Oily exhaust side of B37 turbo

[ianwh4]

Greetings

I require assistance in determining the next steps to take, if someone could provide advise on this matter.


The car's low oil pressure issue has been resolved, since it contained only 1.5 litres of oil. New oil and a filter have rectified the problem.

The DPF readings on live data where at 25 so thats getting blocked up along with EGR codes in the system so the customer wants the DPF pulled out, on approach to pulling the DPF off, I have observed gobs of oil from the turbo.

There is no play in the turbine; the car was boosting adequately until low-pressure error codes appeared. The turbo intake side is not oily, which leads me to question whether the issue is with the turbo oil seals or the PCV system.

With the engine running and the oil cap removed, I am not observing any suction from the oil fill opening, which suggests that the issue may be related to the PCV system. Aim to prevent haphazardly discarding components.

Thank you.

[drummer]

The play in the shaft is attributable to the bearings, not the seals. The seals may deteriorate while the bearings remain in satisfactory condition.

The compressor side seal may remain in satisfactory condition while the turbine side seal, leading to the exhaust, has deteriorated significantly.


If there are significant quantities of oil in the exhaust, it is unlikely to be due to PCV blow-by and may indeed explain the initial depletion of engine oil.

[ianwh4]

This response is excellent. Does this appear to be a turbo seal or PCV issue? I am uncertain if there is an excessive amount of oil, but it feels excessive to me.

[Matt865]

The PCV system will not function as the PCV is located on the intake side, resulting in oil accumulation within the intercooler and intake manifold prior to combustion in the cylinders. The presence of grease on the exhaust side indicates a malfunctioning turbocharger.

[drummer]

If the crankcase pressure is sufficiently elevated to obstruct the oil drain line or induce back pressure through it, it is not uncommon for a leak on the turbine side to occur as a result of crankcase pressure stemming from a severely compromised PCV system.

[ianwh4]

Thank you for your excellent response, my friend.

[ianwh4]

Could this possibly elucidate the absence of suction on my oil cap? It is said online that white smoke will emanate from the oil fill hole with the engine running if the PCV is defective; however, I am not observing any smoke.

[drummer]

Regrettably, it might be attributed to various factors, and the potential explanations are numerous without direct observation.

It may be crank pressure.


It is possible that with only 1.5 litres of oil in the vehicle, the oil in the turbocharger has been degraded, resulting in a blockage of the drain line.

The unlubricated turbo may have compromised the turbine side seals.

It is often more economical to rebuild or replace a turbocharger than to pursue seal leak repairs, as seen in nine out of ten instances. If the pressure is sufficiently high to expel oil from the hot side, I would also anticipate observing leaks from the valve covers or the rear main seal.