Where is the coolant drain port on the Passat?
1 Answers
The coolant drain port on the Passat is located on the left side of the engine compartment, above the shock absorber. The method for replacing the coolant is as follows: Before completely replacing the coolant, conduct a thorough inspection to check for any signs of leakage or cracks in all the pipes, with special attention to the five-way hose. The five-way hose gets its name from having five connection interfaces to various parts. The coolant flows through the five-way hose and is then distributed to different parts of the car to perform its function. If there is any coolant leakage in this area, replace the hose or re-secure the connection as needed. Drain the old coolant, then flush the liquid channels with clean water. Add clean water to the coolant reservoir and continue filling it with water until the water flows continuously through the engine cooling system. Then, 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 coming out is 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. At this point, the coolant level will drop slightly as air is purged from the cooling system. Add more coolant until the level reaches the "MAXT" mark on the reservoir.
