The best time to drain and flush a Land Rover car radiator is at the beginning of the summer heat. Vehicles require more cooling ability when the temperatures rise and cause streets to reflect heat under cars. The addition of using the air conditioner in a Rover adds to the vehicle idling higher to turn the compressor and makes the Rover warmer. Changing the antifreeze in a vehicle and flushing the radiator maintains the cooling system including the radiator and the engine. Fresh antifreeze provides lubrication for all parts in the cooling system to avoid rust entering the sealed system.
Let the engine of the Rover cool to avoid burns from hot antifreeze.
Place a drain pan or bucket under the bottom radiator hose on the left side of the radiator.
Put rubber gloves on both hands to protect them from the antifreeze.
Lie on a mechanic's dolly and slide underneath the Rover.
Place a flat screwdriver in the screw on the metal radiator hose band that holds the bottom radiator hose on to the radiator. Turn the screw counterclockwise to loosen the band and pull the hose off. The old radiator fluid will rush out into the drain pan or bucket.
Slide out from under the rover on the mechanic's dolly and stand in front of the Rover. Remove the radiator cap by pushing it inward and turning one quarter turn counterclockwise. Pull the cap off straight upward. Wait for all coolant to drain out of the radiator.
Replace the radiator drain hose and tighten the metal hose band with a screwdriver turning the screw clockwise.
Fill the radiator with fresh water from the garden hose. Replace the radiator cap by pushing in and turning one-quarter turn clockwise.
Start the engine and let it run until it achieves normal operating temperature.
Let the engine cool for about 15 minutes and drain the water out of the radiator and engine's cooling system in the same manner as draining the antifreeze. Let all water drain out of the system.
Replace the bottom radiator hose. Remove the radiator cap and pour in the radiator flush. Add water to fill the radiator.
Start the engine and let it idle until it reaches the normal operating temperature again.
Drain the radiator using the same method as draining the antifreeze and clear water. Let all water and radiator flush drain out of the radiator hose.
Replace the radiator hose and secure the clamp with a screwdriver tightly.
Refer to the Land Rover owner's manual to find the radiator capacity. Mix antifreeze and water from the garden hose in equal parts to achieve a 50-50 ratio. For example, if the radiator capacity is two gallons, pour one gallon of antifreeze in a clean bucket and add one gallon of water from the garden hose to the antifreeze container. Pour the water into the antifreeze and swirl to mix the two ingredients.
Pour the antifreeze mixture into the radiator through the cap and into the radiator overflow container to the fill line with a marking of cold.
Start the Rover and let it idle. When the thermostat opens, the water will move in the radiator and the level decrease as it enters the engine block. Add more of the mixture to cover the radiator plates and fill the neck on the radiator. When the radiator level stays constant while running the engine, the radiator is full.
Antifreeze is an oily substance. Wearing rubber gloves helps to protect hands from antifreeze so that hands are not slippery and protects hands from allergic reactions. The radiator overflow container is on the left side of the engine compartment and is a white plastic container with a small tube that attaches to the radiator underneath the radiator cap. There is a coolant fill line with a mark for hot and one for cold. These are the levels to fill the container when the Rover engine is either hot or cold. Some models of Rovers have a petcock to drain the fluid from the radiator. This is a knob to turn one quarter turn at the bottom left side of the radiator near the bottom radiator hose. To use this method, open and close the petcock instead of removing the bottom radiator hose.
Dispose of antifreeze where animals cannot reach it. Antifreeze smells sweet to dogs and cats but is deadly if they drink any. Refilling a radiator with water only leads to rust inside the radiator, which enters the engine and destroys the entire engine.