hi, my engine (520i; bj96; 134000) became hot until shortly before the red area, then went down to normal again. after the bitten hoses were replaced and that system was checked for tightness at bmw, the car still loses cool water. means that the cylinder head seal is broken or the cylinder head is torn? what costs such a repair and is worth it at all? can any workshop do that or should you do that better at bmw has one after soner repair rest or is the unit then hit anyway and the next cooling water loss is determined? would I be pleased about the announcement of your experiences? thank you!