How to Replace Coolant in Refine S3?

[StFrank]

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.

[GiannaFitz]

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.

[BrandonLynn]

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.

[LaMaddox]

Don't take antifreeze replacement lightly. Pay attention to these points when operating the Refine S3: Cold engine is a prerequisite, locate the plastic drain valve at the bottom of the radiator. The red or green liquid that flows out when unscrewed is toxic and should be collected in a basin. After draining, tighten the valve tightly. Before refilling, using compressed air to blow out residual liquid is very effective. Be sure to choose ethylene glycol formula antifreeze, the original Jianghuai factory one is good. After filling, start the vehicle and lightly press the accelerator to 3000 rpm to exhaust air until hot air comes out from the heater, which means success. Finally, remember to drive for half an hour and then check the liquid level. It's most suitable to replace before winter, especially in sub-zero northern areas to prevent engine freeze cracks.

[ColtonRose]

I figured out a simple method to replace the coolant in the JAC Refine S3 without removing any parts. When the engine is cold, drain the old fluid from the auxiliary tank and disconnect the return hose connected to the radiator. Use an air pump to blow into the radiator inlet, and the remaining liquid will be forced out from the return hose. This way, you don't need to crawl under the car, making it more convenient, but ensure the pipes are well sealed. Refill slowly; pouring too quickly can cause air bubbles. The original coolant has a freezing point of -25°C, which is sufficient. It's recommended to perform this in the morning as the fluid tends to expand when temperatures rise at noon. After replacement, take a short drive to check if the temperature gauge remains stable. Don't pour the old coolant down the drain; auto repair shops usually recycle it.

[KennedyFitz]

Here's a little trick for changing coolant: the Jianghuai Refine S3's overflow tank has a transparent tube to check the fluid level. When the engine is cold, simply drain the overflow tank first, then open the drain valve at the bottom of the main radiator. For cleaning the radiator, I prefer soaking it with dedicated cleaner for half an hour, rinsing thoroughly with water before adding new fluid. Add coolant in three batches - start the engine for a few minutes between each addition to purge air. Finally, keep the fluid level 3cm below the MAX line when cold; it'll rise to the proper level when hot. Choose coolant based on freezing point specs - I bought Prestone's 5-year formula on JD.com. The whole process takes 40 minutes, saving 200 yuan compared to dealership service.