Hello dear friends! Have a question! Since recently my truck loses cooling water. Unfortunately I have not been able to detect any leak until now. Except in the area of the rear cylinder heads a light puddle forms in between. Was with it already at Daimler. They cleaned it and let the engine run. There was no leak. What can this be about. Where can anything lick there. The engine is a used and partially overhauled ATM (cylinder head seals, piston rings, etc. new)? I changed a week ago, Alle O. K.. I’m baffled