Blown turbo pipe and brown substance stained engine

To celebrate my car's 100,000th mile I decided to have the timing belt changed at a local garage.

After about an hour of collecting the car I heard a pop and lost most of my power.

Another motorist stopped and confirmed that my turbo pipe had come off. I rang the garage and he almost too quickly agreed.

When I looked under the bonnet the engine cover and other plastic parts were covered in a spray of a grey/brown substance. This has stained the plastic and will not come off. When I rub the substance it becomes shiny almost like graphite from a pencil.

There was also water, oil and a greyish gunk around the filler cap on the engine.

I sent the attached photos to the garage and he says the stain is from a "cleaner" they use on the engine. It's obviously not a cleaner as its actually stained my engine cover.

I'm taking the car back to him today and would really appreciate some help in diagnosing the problem so I can force him to accept blame and repair the damage.

The guy that helped me on the side of the road thought it could be a gasket issue as there seems to be water and gunk around the filler cap.

How could fixing a timing belt create these problems?

Thanks for your help

Is there water and gunk inside the oil filler cap neck? If so , it is likely you have head gasket problems .

Changing the timing belt has no effect on the head gasket condition, but its more than likely that the turbo pipes would be disconnected to do the job.....maybe they just weren't connected up correctly?
However, turbo pipes are full of all sorts of grot, usually oil based - and you'd be surprised what comes out of them.
What you need to do is to remove the filler cap of your coolant expansion vessel - on the left - and run the engine up to temperature. If there is any sign of oil or air bubbles in the coolant, then you have head gasket issues.
There are other tests, but this is the simplest.
What vehicle are we talking about here....it looks like a small VAG diesel?
John

Hi John,

Thanks for your reply. It's a VW TDI 2004.

Any idea what all of the stuff on my engine cover is? Could that have been blown in from my Turbo pipe when it disconnected?

I forgot to mention the water pump was also changed...

I'll go and run the car now...

Thanks

Alas, we don't really know what has been going here, but if I was to disconnect a turbo pipe and run the motor there would be a spray of oil and gunge everywhere.
A pound to a penny, what we see here is emulsified oil, but whether that's come from the (unnecessary) cleaning of the motor or otherwise we just can't tell.
Changing the water pump was a good move and the coolant will now be new, but again this doesn't introduce any oil into the system.
I should have said, VAG motors use a special U shaped clip to hold the turbo pipes in place, and nothing else will do!
John