Turbo blown how to manage oil leak?

[RR76]

Injectors were bad causing turbo to blow(contaminated oil/fuel mix). Luckily didn't run van for long few mins but seems that's all it takes so hope dpf is ok. Some oil coming out of exhaust/turbo join is telltale of blown turbo.

I'm wondering best next step. Turbo will have to be replaced but should I try and clean oil out of exhaust or has it likely destroy dpf already?

So my question is really about cleaning out the oil leak from the blown turbo?

[GreenV8S]

I wouldn't bother trying to clean grubby surfaces but it's worth looking at the manifold layout to see whether there are any places where oil could have puddled.

You may have had a lucky escape - a turbo that starts leaking oil on the inlet side can lead to a diesel runaway.

[RR76]

GreenV8S said:

I wouldn't bother trying to clean grubby surfaces but it's worth looking at the manifold layout to see whether there are any places where oil could have puddled.

You may have had a lucky escape - a turbo that starts leaking oil on the inlet side can lead to a diesel runaway.

It was very close to runaway when shutting van down, runaway for about 2 secs etc quite scary.

[GreenV8S]

RR76 said:

It was very close to runaway when shutting van down, runaway for about 2 secs etc quite scary.

If it happens again and you have the presence of mind, your best bet is to get it in gear with the clutch fully engaged and then stand on the brakes. Unless it's an auto - then you're screwed.

[RR76]

GreenV8S said:

If it happens again and you have the presence of mind, your best bet is to get it in gear with the clutch fully engaged and then stand on the brakes. Unless it's an auto - then you're screwed.

I can understand why the injectors might be leaking/failed/stuck open etc, they were left out of engine for number of weeks by garage who said they would repair the engine. I have no idea how these injectors were handled during that time. I decided to try and fix the van myself. I hindsight I really didn't understand about diesel engines and now I realize how close I was to a runaway engine.

However I only ran the van for maybe 2mins yet there's probably 2 litres of fuel in the oil. How can failed or leaking injectors cause that much fuel in the oil, will the fuel be leaking past the piston rings?

And yes I got injector knock which sounds a lot like rod knock. The excess fuel must cause the injectors to push out of their bores and slam down again or something like that.

Anyway, it's a lot of fuel in the oil for such a short time the engine was running and I'm trying to understand why so much fuel was able to find it's way into the oil. You can hear the engine beginning to run away when I shut it down.

Here's a video I took. Listen to the injector knocks about half way through .

https://youtu.be/-b5iq34O1D8

Edited by RR76 on Sunday 11th June 07:10

Edited by RR76 on Sunday 11th June 07:11

[GreenV8S]

A well-known cause for diesel contamination in the oil is ineffective passive DPF regen leading to excessive active regens. Frequent stop/start driving is can cause or aggravate the problem.

Do you know how long that oil has been in the engine? It's possible the contamination happened over a much longer time frame than those few minutes of running.

If it happened that quickly there's a serious problem such as a leaking fuel rail. Is that diesel fuel spraying over the outside of the engine while it's running? That's also a sign of a serious problem.

[RR76]

GreenV8S said:

A well-known cause for diesel contamination in the oil is ineffective passive DPF regen leading to excessive active regens. Frequent stop/start driving is can cause or aggravate the problem.

Do you know how long that oil has been in the engine? It's possible the contamination happened over a much longer time frame than those few minutes of running.

If it happened that quickly there's a serious problem such as a leaking fuel rail. Is that diesel fuel spraying over the outside of the engine while it's running? That's also a sign of a serious problem.

Possibly could have been over a longer time period.

The fuel leakage in video is due to leak off not properly seated. Once I seated it the fuel absolutely blasted out of what I think was all injector/cylinder block join, at least one though. I didn't want to run it long.

So is it possible that much fuel leaked through the piston rings?