How to Clean Scale in Car Radiator?
4 Answers
There are mainly three methods to clean scale in car radiators: manual cleaning method, ordinary scale cleaner method, and professional car radiator descaler method. Below are the specific steps for each method: 1. Ordinary Scale Cleaner Method: Dismantle the radiator for manual cleaning. 2. Ordinary Scale Cleaner Method: Requires dismantling the car radiator and manually removing scale with tools like hammers, scrapers, etc.; low descaling efficiency, low labor intensity, difficult to clean thoroughly, and may cause secondary damage to the radiator. 3. Manual Cleaning Method: No need to dismantle the radiator, and cleaning can be done without stopping the car. Simply pour the dedicated scale cleaner into the car's water circulation system, let it soak, idle or drive for 20-30 minutes (adjust time based on scale severity, usually not exceeding one hour), then drain the descaler from the radiator and system, rinse repeatedly with water to effectively remove scale, rust, mud, and various harmful substances from the engine's water circulation system.
Cleaning car radiator scale is a common issue, and I've encountered it several times myself. First, let the car cool down to ensure the engine is cold before operating to avoid burns. Then open the radiator drain plug to release the old coolant. Add a dedicated radiator cleaner or descaling agent according to the instructions, then fill with water to the full level. Start the engine and let it idle for about 20 to 30 minutes, allowing the cleaner to fully dissolve the scale. After turning off the engine, drain the fluid again and rinse several times with clean water until clear water comes out. Finally, add new antifreeze instead of tap water to prevent scale recurrence. Scale mainly comes from hard water or infrequent fluid changes, accumulating calcium and magnesium minerals, which affect heat dissipation and cause overheating issues. Now I check regularly and clean every two years, making the car run smoother.
As a frequent solution to similar issues, using professional chemical agents is more effective for cleaning radiator scale. The procedure involves first draining the cooling system, then adding a mixture of descaling agent and water, followed by starting the engine and letting it idle for half an hour to ensure the solution penetrates. Rinsing must be thorough, possibly requiring multiple flushes to prevent residue from clogging the pipes. If the scale is severe, it's best to visit a repair shop for high-pressure equipment cleaning. After cleaning, replace with new antifreeze, which contains anti-scaling components to keep the radiator clean long-term. Daily maintenance should not overlook water quality; purified or distilled water is preferred. Regular cleaning prevents overheating and engine damage.
Try using common household white vinegar to clean scale deposits—it's cost-effective, eco-friendly, and convenient. Drain the old coolant when the engine is cold, pour in a half-bottle vinegar-water solution, then idle the engine for about 15 minutes. The acetic acid effectively dissolves mineral deposits. Rinse thoroughly multiple times afterward to remove residue. Regularly use antifreeze instead of tap water to minimize mineral buildup. Prevention is better than cure—simple and practical.
