How to Replace the Coolant in a BYD F3?

[SanMargaret]

To replace the coolant in a BYD F3, locate the coolant drain plug, unscrew it to drain the old coolant, tighten the drain plug, and then pour in the new coolant. The BYD F3 is an A-class passenger car produced by BYD Auto, with body dimensions of 4.533 meters in length, 1.705 meters in width, and 1.490 meters in height. The BYD F3 is equipped with a Mitsubishi 4G18 engine, featuring a naturally aspirated intake system and a 5-speed manual transmission. It delivers a maximum power output at 5800 rpm and a maximum torque of 144 Nm. For safety, it is equipped with four-wheel ABS and EBD.

[LaJessica]

I've changed the coolant for my BYD F3 several times myself, and safety is the top priority. The car must be parked on level ground with the engine completely cooled before starting—working on it while hot can cause burns. Open the hood and locate the radiator cap, but don’t touch it if it's still hot. Once cooled, find a small drain valve at the bottom of the radiator, usually screw-shaped, and slowly loosen it with a wrench to let the old fluid drain into a bucket, avoiding spills. The old coolant is toxic and must be disposed of at a recycling point. Tighten the valve afterward and pour new coolant into the radiator—BYD F3 recommends using the dedicated green type, either a 50/50 mix with water or pre-mixed, and avoid mixing brands to prevent corrosion. Fill it to the MAX line, then start the engine and let it run for a few minutes to purge air bubbles. Once the fan kicks in, top up the level and check for leaks. Wear rubber gloves and goggles, and ensure good ventilation. If anything goes wrong, engine overheating can lead to costly repairs. The tools are simple—just a wrench and a bucket—so it saves money but requires patience.

[RileyDella]

Last year, I saved some money and had fun changing the coolant for my BYD F3 in my own garage. After the engine cooled down completely, I carefully loosened the drain screw under the radiator to let the old fluid flow into a plastic basin. Remember to buy the new coolant beforehand—the BYD model uses standard blue or green types, so don’t mix up the brands. I chose Bosch for good compatibility. After draining the old fluid, I used a bottle of flushing agent to clean the system, ran water through it for five minutes, and drained it again for a cleaner result. Then, I poured in the new coolant, started the car, and let it idle for ten minutes to let the air bubbles escape before topping it off and tightening the cap. The whole process took half an hour, and the materials cost less than 50 yuan. I also picked up some handy skills. For beginners, I recommend having a friend help watch for leaks or recording a video to prevent mistakes. After the change, the car ran much smoother.

[VictoriaLynn]

As an F3 owner, changing the coolant is quite beginner-friendly. After the car cools down, open the hood and locate the radiator, usually at the front. Wait until it's completely cool, then loosen the bottom drain plug to release the old fluid, catching it with a bucket. The old fluid is hazardous—take it to a recycling center. Before adding new coolant, flush the system with water, run the engine briefly, then drain it completely. Then pour in new coolant—BYD models require a specific type—filling it to the upper limit line. Start the engine, let it warm up for five minutes until the fan kicks in, then top up the coolant level. Confirm there are no leaks, and you're done. Replace it every two years to protect the engine—saving money and ensuring peace of mind.