How to Replace Coolant in Refine S3?
3 Answers
After opening the engine hood, unscrew the radiator cap, then open the radiator drain valve to drain the coolant. Find a hose that can connect to tap water, insert it into the radiator filler port, turn on the faucet, and let the tap water continuously flow through the engine cooling system. During the flushing operation, keep the engine idling and maintain the above operation until clean water flows out from the radiator.
I'm quite familiar with changing antifreeze. Here's how to do it for the JAC Refine S3: First, make sure the engine is cold—don't attempt this right after driving. Locate the radiator drain valve at the bottom front of the car, place a basin to catch the old fluid, and let it drain for about 20 minutes. Then, close the valve and unscrew the expansion tank cap to clean out any impurities inside. Here's the key point: you must purchase JAC's dedicated green or red antifreeze—never mix different types! Pour the new antifreeze into the expansion tank up to the MAX line, start the engine, and wait for the coolant temperature to rise. Turn off the engine only after the radiator fan starts running. At this point, the fluid level will drop, so top it up to the standard line again. Remember to check for leaks at pipe connections, and properly recycle the old antifreeze afterward. I change it every two years, and it provides excellent engine protection.
Changing the coolant by yourself is actually quite simple. I've done it three or four times on my JAC Refine S3. Just prepare new coolant, a drain pan, and gloves. The engine gets hot and can burn your hands, so wait for it to cool down. Open the hood and locate the white plastic expansion tank, which has a hose connected to the radiator on the side. When loosening the hose clamp to drain the old coolant, don't rush—it can splash. After fully draining, tighten the clamp and rinse the expansion tank twice with purified water. Pour in the new coolant up to the MAX mark on the scale. Start the engine and top up the coolant once the temperature gauge shows normal operation to prevent airlocks in the system. The key is to use the OEM coolant of the same color, as cheap alternatives can corrode the aluminum radiator.
