How to Replace the Antifreeze in a Bora?
4 Answers
The method for replacing the antifreeze in a Bora: 1. After the engine has cooled, open the car's hood and locate the antifreeze reservoir, then open its cap; 2. Open the radiator drain plug, completely drain the old antifreeze, and then reinstall the drain plug; 3. Pour a certain amount of antifreeze into the reservoir, run the engine, and add antifreeze until the level is between the MAX and MIN marks on the reservoir. The Bora is a compact sedan under the Volkswagen brand, with body dimensions of 4663mm in length, 1815mm in width, and 1473mm in height, and a wheelbase of 2688mm. The vehicle is equipped with a multifunction digital display instrument panel, cruise control system, standard front passenger full-size butterfly airbag, driver's seatbelt reminder alarm, and pedestrian protection function.
Last time I helped my neighbor change the coolant in his old Bora, it was quite a meticulous process. First, you have to let the car cool down - opening the cooling system when it's scalding hot is too dangerous. Locate the plastic drain valve under the radiator and use a basin to catch the old fluid, which is highly corrosive and shouldn't be poured out carelessly. After draining completely, remember to flush the cooling system, preferably with distilled water twice if possible. For the new coolant, choose G12 or G13 models certified by Volkswagen, and mix it with distilled water according to the manual's ratio - never use tap water directly as it causes scaling. When refilling, do it slowly. After filling up, don't rush to close the cap - start the engine and wait for the fan to cycle twice, then top up to the midline after the temperature rises. Finally, check all hoses for leaks, especially those aging rubber ones.
I always check the coolant in my 2014 Bora before winter. The key to coolant replacement is bleeding! Volkswagen's cooling system tends to trap air, and improper operation can cause erratic temperature gauge readings. First, unscrew the expansion tank cap to release pressure, and only proceed when the engine is completely cool. The drain valve is at the bottom left corner of the radiator and can be unscrewed by hand. Use a funnel when pouring new coolant to avoid spills—make sure to buy the red OEM formula, as mixing different colors can cause gel formation. A critical step: after refilling, run the engine for ten minutes until warm air blows from the vents—this confirms complete air bleeding. Top up the coolant if the level drops. Finally, use a refractometer to test the antifreeze performance; it should protect down to -25°C.
The mechanic emphasized three steps when teaching me to replace the coolant: protection, cleanliness, and precision. Always wear gloves when working on a cold engine, as the old fluid is highly toxic. Flushing the cooling system thoroughly after draining can extend the lifespan of the new coolant. A Volkswagen Bora typically requires about 5 liters, so buying a large container is more cost-effective. When refilling, do not exceed the MAX line marked on the overflow tank. After starting the engine, wait for the electric fan to activate, indicating the coolant has circulated. Monitor the water level for three days, as you might need to top up about half a liter shortly after replacement. Replacing it every two years is the safest practice, but if it turns cloudy, an earlier replacement is necessary.
