How to Replace the Coolant in a Jetta Car?
2 Answers
Jetta car coolant replacement method: Before completely replacing the coolant, conduct a thorough inspection to check for any signs of leakage or cracks in the pipelines, with a special focus on the five-way water pipe. The five-way pipe gets its name from having five connecting interfaces to various parts. The coolant flows through the five-way pipe and is then distributed to different parts of the car to function. If there is any sign of coolant leakage in this part, the water pipe should be replaced or the interface re-secured as needed. Drain the old coolant, then flush the liquid channels with clean water. Add clean water to the coolant reservoir, then continue to pour water into the reservoir to allow it to flow 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 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 is the quickest way to get the coolant into the radiator. Then add another container 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 again until it reaches the "MAXT" mark on the reservoir.
As an experienced driver with twenty years behind the wheel, I believe it's crucial to wait until the engine cools down before changing the Jetta's coolant to avoid burns. Prepare a bucket to catch the old fluid, locate the drain valve at the bottom of the radiator, and unscrew it to let the old fluid drain completely—this process might take a few minutes. Then, flush the system to prevent any residue from affecting the performance of the new coolant. For the new coolant, a 50/50 ethylene glycol-based mix is ideal. Pour it in slowly to avoid creating air bubbles. Finally, start the car to check for any leaks. I recommend changing the coolant every year before winter to protect the engine from freezing cracks, saving money and ensuring safety.
