Sh...shit, I have oil in the cooling water

Hey, guys.


My 4.2 is just in the garage because of the gasoline pump, they switched me, too.
However, he was about 4 weeks ago for inspection, and should also be looked up immediately where he loses oil. My guess that oil comes from the timing belt housing on the passenger side, I told the master yes, but was sealed on

"The second oil tank, because your car has two of them."

Well, I took it that way first. Unfortunately, it was not done with it. After three days in the garage there was a new oil stain.
Now with the petrol pump repair I have monetized this, of course, especially since the wash nozzle pump was also renewed at the time and that is now in close proximity to the timing belt housing, you could have taken a look.
And just a call from the workshop comes that oil really runs out there, besides, you have done your best with the diagnosis this time and determined the
"Tracks of oil in cooling water are

The fitter also started speculating on what has to be done now:
Oil from timing belt housing means:
- Timing belt change with all the rollers, wapu and all the simmerings you can get to (annoying because the only 25 Tkm is in it)

Oil in water means:
- it can be anything from the head seal to...

Although I'm old enough to notice if someone wants to talk to me stupidly, I'm not sure I can distinguish the necessary from the unnecessary and the right from the wrong.


What is your opinion, what should I do, what proposals should I respond to?
How does a workshop even have to proceed to detect the defect?
First, break it all up and then say that and that's it?

Greetings for help

Frank