How to Flush Radiators

The radiator of a car acts as its cooling system. To function effectively, it should be clean and free from obstacles so it is important that it has no leaks.

Understanding Car Radiators

Before learning how to flush a radiator, you need to know the purpose a car radiator.

The purpose of a car radiator is to eliminate heat coming from the hot water that circulates in the cooling system. As hot water enters the top tank of the radiator, it filters down to the core fins and cools before returning to the engine passing through the water pump.

Ideally, the radiator of your car’s cooling system should be flushed out every six months. It will prevent blockages in the core as well as the accumulation of rust in the system. Here now are the steps on how to flush a radiator.

  1. After parking your vehicle on a level surface, switch off your engine and activate your heater. Cover the engine to prevent splashes going to your radiator.
  2. Remove the radiator cap. Turn the bottom tap to let water out and remove upper and lower hose radiators.
  3. Check the condition of the hoses. Fragile or damp hoses should be replaced by a new one.
  4. Learning how to flush a radiator will require you to check the previous liquid coming out of the radiator. If the substance is rusty brown, the system requires an extra special flushing. In any case, try to flush the system anyway.
  5. Place the water hose into the top of the radiator and allow it to gently flush through momentarily, until it is clear of water again.
  6. Put the hose in the outlet of the bottom radiator and reverse flush. Afterwards, flush water from the top radiator again.
  7. Flush water through the cooling jacket of the engine to get rid of any deposit.
  8. In instances when your radiator is very dirty, a can of radiator flush can be used for cleaning. In this stage of how to flush a radiator, you need to place the hoses back on, top it up with water again, insert the flush treatment, and start the engine for a while to remove corrosion deposits.
  9. 9. When you are almost done with flushing, close the tap of the radiator, close the hoses and fill the radiator with a coolant liquid. Current coolants come with corrosion inhibitors and works best with plain water.
  10. Before returning the radiator cap, inspect its condition. If it is old or has rust, replace it with a new one.
  11. Start your engine and leave it that way while inspecting any potential leak.
  12. Take your car for a spin to see if the cooling system is working properly. Keep the engine running and monitor for leaks again.
  13. When the engine has cooled down, inspect the coolant level and check if it requires further topping up.

Final Reminder

When your radiator has a leak, you can buy a can of sealer. This will be placed in the coolant. However, it is good for small leaks and offers temporary solution.

When learning how to flush a radiator, you need to realize that a leaking radiator requires the assistance of a specialist or getting a replacement unit.

By following these tips on how to flush a radiator, you will be able to repair leaks in your car’s radiator.

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