The cylinder head also contains sensors that perform various engine control functions.
Since the cylinder head is made of aluminum alloy, it can be easily deformed if, for example, the sequence of loosening or tightening the head mounting bolts is not followed. It is not permitted to remove the cylinder head on a hot engine.
It is almost impossible to check the serviceability of the cylinder head installed on the engine. It may be that the cylinder head gasket has blown. A preliminary check can be carried out after removing the cap from the radiator expansion tank. If air bubbles are visible in the reservoir while the engine is running, it can be assumed that the cylinder head gasket has burned out. Other symptoms of a blown head gasket include white smoke from the exhaust pipe, traces of oil in the coolant, or water in the oil. The presence of water in the oil can be checked using the dipstick pulled out of the engine. If the oil on the dipstick is white or gray, it can be assumed that the cylinder head gasket is damaged.
If you are sure that coolant has penetrated the engine cylinders, and the car needs to be driven to a parking place or another place, then you should unscrew the injectors and turn the engine over with the starter. This way you can clean the cylinders from accumulated liquid. After this, install the injectors in their places, start the engine and proceed to your destination without stopping the engine. This is the only way to prevent serious damage to the crank mechanism (for example, deformation of connecting rods).
(Article text obtained from the website: «www.mercedesman.ru»)