Well, she was running for a couple of days. What a ride! The bus accelerates like my ordinary car and I haven't been flooring the pedal yet.
Three days with just a few miles driving, then the oil buzzer and oil light goes off. I checked the oil level and the entire volume was gone! No smoke, totally clean engine, not a single trail of oil. Then - I opened the coolant reservoir...
All the oil is flooding out!
First I thought "Crap, I need to check the header", but the almighty guys at thesamba.com hinted about the oilcooler which appearantly is prone to cracking. After some googling I think the same. All symptoms leads to a cracked cooler. Oil in the coolant, no coolant in the oil.
What seems to happen is that a crack in the cooler acts like a one way valve, and when the thermostat opens the oil has enough pressure to force itself out to the coolant.
I really really really hope this is the case, I'm not keen to take the engine out again.
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