Hello I have a vehicle which mixes oil into the cooling water PöaPö. The CC was changed 1.5 years ago because of crack in the CC thereby water loss. After that oil in the water. On guarantee they have made the ZK again and changed ZKD. No improvement. How great is the probability of the engine hull has a crack ? Car has at 135 TKm ÖLGEMISHT and is from bj 2003 . Can one check the crack in the engine somehow ? I think that one cannot achieve anything with the testing of the water pressure loss because the oil pressure can be up to 7 bar compared to 1-1.5 bar water pressure. MFG Nihat