If a car lacks coolant, the coolant warning light on the dashboard will illuminate. Coolant Replacement Method: Before completely replacing the coolant, conduct a thorough inspection to check for any signs of leakage or cracks in the pipes, with a particular focus on the five-way hose. The five-way hose is named for its five connecting interfaces to various parts. Coolant flows through the five-way hose and is distributed to different parts of the car to function. If there is any coolant leakage in this section, replace the hose or re-secure the interface as needed. Drain the old coolant, then flush the liquid channels with clean water. Add clean water to the coolant reservoir, then continue adding water to the reservoir so that water continuously flows through the engine cooling system. Start the engine and let it idle for 3 to 5 minutes to circulate the water. Initially, the water draining from the reservoir may have a faint pink tint. Continue adding clean water until the drained water runs clear. Note: Don’t forget to remove the heater hose and drain the water from the heater core. After draining for about an hour, add the new coolant through the radiator hose—this allows the coolant to flow quickly into the radiator. Then, add another bottle of coolant to the reservoir until it is nearly full. Start the engine and let it run for about 10 minutes. During this time, the coolant level will drop slightly as air is purged from the cooling system. Top up the coolant to the "MAXT" mark on the reservoir.
