How to Clean Dirt from the Car Radiator?

[JaceFitz]

Steps to clean dirt from the car radiator: 1. Park the vehicle and turn off the engine. Wait for the coolant temperature to drop, then open the expansion tank and add radiator cleaner; 2. Start the engine and let it idle for 5 to 10 minutes after the cooling fan starts working; 3. Turn off the engine and remove the front bumper of the vehicle. Ensure all fixing screws are unscrewed during removal, and slowly detach it from both ends towards the center to avoid breaking the clips; 4. After ensuring the coolant has completely cooled, drain the radiator cleaner along with the coolant, and finally replace it with new engine coolant.

[JosephineLee]

I've got experience with radiator cleaning. First, make sure the engine is completely cooled down—wait about an hour after parking, or you'll get scalded opening the radiator. Then drain the old coolant, using a pan to catch the dirty fluid. Next, pour in a professional cleaning solution or a cheaper white vinegar-water mix, start the engine, and let it run for 10 minutes to circulate the solution and flush out deposits. Drain it, then rinse with water several times until the runoff is clear, ensuring no rust or mineral buildup remains. Finally, refill with fresh coolant and tighten the cap. I usually do this every two years—gunk buildup, mainly scale blocking the cooling fins, causes overheating. Neglecting it leads to costly repairs, but this DIY saves hundreds and gives peace of mind.

[Raquel]

Cleaning dirt requires proper methods, and I always choose safe operations. First, park the car steadily and let it cool down, then carefully loosen the drain valve with a wrench to drain the fluid—don't forget to wear gloves to prevent chemical irritation. When there's heavy dirt buildup, I gently brush the radiator fins with a soft brush to avoid damage from high-pressure water. Using automotive-specific cleaning agents delivers great results, or you can DIY with a 10% vinegar solution for a 30-minute soak before rinsing—this removes rust in an eco-friendly and cost-effective way. Rinsing until the water runs clear is key, followed by filling the engine with clean water, running it for a few minutes, and then draining it. Performing this routine regularly prevents clogs and maintains cooling efficiency.

[ColemanMarie]

The first time I flushed the radiator, it was quite chaotic, but the lessons learned were practical. First, park and let it cool, drain the dirty water, then add half a bottle of white vinegar and water before starting the engine to idle. After ten minutes, rinse it clean. Beginners should avoid using strong cleaners that can corrode metal—warm water rinsing is safer. Remember to check the radiator cap’s seal; replace it if aged to prevent leaks. Most grime is caused by scale buildup leading to overheating. Following YouTube videos step by step made it hassle-free and cost-effective. It only takes 20 minutes each time.