When the engine is running, a properly functioning cooling system maintains an optimal temperature regime. Malfunctions in the cooling system can lead to engine overheating. If you miss this moment, unpleasant consequences may arise: a breakdown of the cylinder 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 indicator needle approaches the red zone.