What to Do When the Car Radiator Water is Too Dirty?
2 Answers
Slowly add radiator automatic cleaner into the radiator until the coolant reaches the normal level, then tighten the radiator cap. Allow the water temperature to reach normal operating temperature, then run the engine for 1-40 hours as needed. If there are hard water deposits in the cooling system, extend the running time to 10-48 hours. Drain the coolant containing deposits and replace it with antifreeze or clean coolant. Clean the radiator with automatic cleaner once a year.
I've handled the issue of dirty coolant several times myself. First, park the car on level ground, turn off the engine, and let it cool down. Carefully unscrew the radiator cap to avoid burns. Use a bucket to catch the old fluid and dispose of it properly to avoid environmental pollution. Then, fill it with clean water, start the engine, and let it run for about ten minutes to circulate the water and flush out the dirt before draining it again. Repeat this flushing process two or three times until the water runs clear. The dirty water is full of rust and impurities that can clog the radiator fins, causing the engine to overheat and fail—that's when real trouble starts. Finally, add new coolant, making sure to choose the right specification. Never use tap water as it can corrode the pipes. Replace the coolant every two years for optimal prevention, and remember to check the radiator hoses for cracks or leaks while you're at it. Addressing small issues promptly can save you from costly major repairs.
