Common signs of poor coolant condition include engine overheating warnings (dashboard coolant temperature warning light illuminating or the needle entering the red zone), coolant leaks (colored oily liquid traces appearing on the ground or in the engine compartment), cooling system boiling (gurgling sounds accompanied by steam emission), and reduced power performance (sluggish acceleration, rough idling). Additionally, insufficient coolant will cause the radiator fan to operate continuously at high speed, while residual liquid freezing in low-temperature environments may lead to radiator cracking. Only use the same specification product when replenishing. Routine maintenance requires coolant replacement every 2 years or 40,000 kilometres, with regular checks of hose integrity. Turbid coolant or visible sediment indicates rust inhibitor failure, necessitating prompt replacement to prevent cooling system passage blockage.
