To have your diesel radiator running at peak efficiency, it’s vital to flush and refill it on a frequent basis. Many people wait until the antifreeze appears badly contaminated, but if you expect this and monitor it on a regular basis; you can preserve your coolant system in peak condition. Inspect your vehicle’s manual for suggested time periods. It is not hard to learn how to flush a diesel radiator. One rule of caution is often to work on your car radiator when it is cool. For your own safety, do not work on it when it’s still hot.
Step 1 – Prepare The Vehicle
Where it is possible, park your car on a slight incline, facing downhill. It is helpful to turn the wheels facing away from the hill in order to keep it from rolling downwards while in park. Put on your emergency parking brake too at the same time.
Step 2 – Let the System to Cool
Allow your car to completely cool down, at least one to two hours.
Step 3 – Drain the System
Put the bucket under the radiator drain and open it with a pair of pliers. You may find it handy to use a 3-foot length of ¼ inch tubing to channel the flow into the bucket, although this may not be necessary. Open the radiator cap.
Step 4 – Refill System with Water
Once all the antifreeze has fully drained, cover the radiator cap and tighten the radiator drain plug. With the use of distilled water, fill the system to its capacity.
Step 5 – Turn off Car
Turn off the engine and let it to cool again.
Step 6 – Repeat Steps 2 to 4
You should repeat steps 2 through 4 of draining and filling with water, then let the engine and heater to run, until it drains clear. How dirty your antifreeze is will determine how many times you need to repeat this procedure.
Step 7 – Refill with Antifreeze
Once the water is clear and free of debris, it’s time to refill it with fresh antifreeze. There is no concern if there is a little water left in the system. Be sure that the radiator plug is firmly seated. Refill the system with the amount of antifreeze that your engine’s manufacturer recommends. Only dilute the antifreeze per instructions on the bottle or by the manufacturer of your car. Some antifreeze needs an additive, so be mindful when you are buying it that you have what you need. Change radiator cap.
Step 8 – Start the Vehicle
Start your car and turn your heater on its highest setting. Let it run until it reaches its normal operating temperature. At this level, your car is ready to drive.
Inspect the coolant in your diesel radiator after operating for a few days to be sure that it is at its right level and there are no leaks.