
The method for adding water to the S7 radiator mainly includes the following steps: 1. Ensure the engine and radiator are cold, and the drain plug at the bottom of the radiator is closed. 2. Place a funnel into the radiator neck. 3. Pour the recommended amount of antifreeze into the radiator through the funnel and neck. 4. Add water as needed according to the mixing ratio. 5. Install the radiator cap. 6. Run the engine to expel any air trapped in the coolant. Additional Information: The radiator is a crucial component of a water-cooled engine, serving as a key part of the cooling circuit. It absorbs heat from the engine block to prevent overheating. Due to water's high specific heat capacity, it can absorb a significant amount of heat from the engine block without a substantial temperature rise. Thus, the engine's heat is transferred through the coolant liquid circuit, using water as the heat carrier, and then dissipated via large-area cooling fins through convection to maintain the engine's optimal operating temperature.

Adding coolant to the S7 is actually quite easy. I often help my friends with this in the garage. After parking the car, make sure to wait until the engine has completely cooled down—letting it sit for an hour or two is even safer to avoid hot water spraying out and causing burns. The coolant reservoir is located at the front of the engine bay, a translucent plastic box with a cap labeled 'Coolant.' Gently twist off the cap, moving slowly to prevent pressure buildup. Pour in dedicated automotive coolant—never use tap water, as it can corrode the pipes or freeze and crack the reservoir in winter, leading to engine overheating. Fill the coolant up to the 'MAX' mark without exceeding it to avoid overflow and contamination of other components. Then, securely tighten the cap and start the engine to run for a few minutes, checking if the coolant level drops. If the level frequently drops, promptly inspect for leaks. Regularly topping up the coolant can extend your vehicle's lifespan and save you from costly repairs.

I've driven a S7 for three years and have had several experiences with refilling the coolant reservoir. After parking on a level surface and turning off the engine, patiently wait for it to cool down for at least half an hour for safety. The coolant reservoir is located towards the front of the engine bay, typically a square container with a green cap. Open it carefully; I usually use a cloth to prevent splashing. Pour in dedicated coolant or a 50/50 mix with distilled water, but don't overfill—just up to the 'Full' line. After replacing the cap, start the car and let it idle for a while to ensure the coolant level remains stable without dropping. Remember to check the reservoir cap's sealing ring for integrity, as a faulty seal can lead to cooling system failure. If you frequently find the coolant low, it might indicate loose pipe connections. Make it a habit to check monthly to avoid the hassle of breaking down on the road.

The steps to add water to the radiator are simple: Park the car and ensure the engine is cold, wait for an hour. Open the hood and locate the radiator box. Slowly open the cap and add coolant (do not use water). Stop when the liquid level reaches the 'MAX' line. Securely close the cap, start the engine, and check for any leaks.

Safety first: I always emphasize waiting until the car is completely cool before adding water to the radiator—don’t take risks. Wear thick gloves when opening the cap, and step back to avoid potential high-temperature steam or splashes. Pour in dedicated coolant according to the manual’s specified ratio—for the S7, a 50% antifreeze mix is recommended to prevent corrosion. Avoid overfilling to prevent boiling over and engine damage. After adding, check the system’s tightness to prevent leaks. If you notice strange odors or rapid coolant level drops, seek professional repair. Regular maintenance is key to avoiding engine failure on the road.

Adding coolant to the radiator isn't just about topping up fluids—it's crucial for : Using coolant instead of water prevents freezing, corrosion, and extends vehicle lifespan. It's recommended to check the fluid level annually or every 10,000 kilometers. When the engine is cool, fill to the 'MAX' mark without overfilling. For BYD S7 owners, frequent low coolant levels may indicate cracks requiring repair. Developing a habit of regular vehicle self-checks saves major repair costs and ensures safe driving.


