Hello, short summary of the situation: – Water in the oil cycle. – Workshop has changed heat exchangers. – Same symptoms. – Oil pressure ok, water loss 8 liters to 200km. – Supposedly head seal ok, no further signs of a defect. – Workshop statement: (hair) crack in the engine block very likely => engine damage. I can hardly imagine this (or don’t want it ;-)) BJ 2001, only 75,000 km, mostly driven in Switzerland, so not high-speed, checkbook gep Does anyone have any advice? What else can it be? Experiences on this topic? Thank you for your help, dear greetings from Zurich T.