When the engine is running, a good cooling system maintains optimal temperature conditions. Malfunctions in the cooling system can cause the engine to overheat. If you miss this moment, unpleasant consequences may arise: breakdown of the head gasket, warping of the head and, as a result, complex and expensive engine repairs.
The instrument cluster of any car has a coolant temperature gauge. If the engine overheats, the pointer needle approaches the red zone.