Is it necessary to bleed air when replacing coolant in Geely Boyue?
2 Answers
When replacing coolant in a car, it is necessary to bleed air. The method involves using the small coolant reservoir where there is a thin tube. After the vehicle's operating temperature reaches 90 degrees, turn off the engine and wait for it to cool down. Then, open the cap of the small reservoir to release excess gas and top up the coolant. Method for replacing coolant: 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 gets its name from having five connection points to different parts. Coolant flows through the five-way hose and is then distributed to various parts of the car to function. If there is any leakage of coolant in this section, the hose should be replaced or the connections re-secured as needed. Drain the old coolant and then flush the fluid channels with clean water. Add clean water to the coolant reservoir and continue filling it until water flows continuously through the engine cooling system. Start the engine and let it idle for 3 to 5 minutes to circulate the water. Initially, the water flowing out of the reservoir will have a faint pink color. Continue adding clean water until the water runs clear. Remember 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 to allow 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. As some air is expelled from the cooling system, the fluid level will drop. Top up the coolant again until it reaches the "MAXT" mark on the reservoir.
Last time I changed the coolant for my Geely Boyue, I made the mistake of not bleeding the air. At that time, I thought just topping up the fluid would be enough, but while driving, the temperature gauge suddenly spiked, which scared me into pulling over to check. Upon inspection, I found air bubbles trapped in the system, causing poor radiator circulation and nearly overheating the engine. Later, I learned the proper method: after filling with new coolant, you must start the engine and let it reach normal operating temperature, then loosen the air bleed screw on the engine side (located beneath the hood for the Boyue) to slowly release the air bubbles, repeating the topping-up process until the fluid flows out continuously without bubbles. The whole process takes an extra ten minutes or so, but it prevents major issues. Now, every time I change the coolant, I do it carefully and also regularly check the fluid level and radiator condition to avoid risks from negligence. This makes driving much more reassuring, and my friends even say I know my way around cars now.
