Cooling system (Discovery 3)

1. Check the specific gravity of the coolant with a density meter.

NOTE: A suitable density meter can be ordered through the equipment program (Part no. 511 3302 001 00).

2. Add coolant to the cooling system if necessary. For more information refer to Specifications (303-03 Engine Cooling - 4.4L).

CAUTION: The antifreeze concentration should be kept at 50%.

Checking/topping up coolant

WARNING: Do not remove the coolant expansion tank cap when the system is hot, as steam or coolant escaping from the cap could cause serious injury such as scalding.

WARNING: Coolant that comes into contact with the paintwork can damage it. If coolant is spilled, remove it immediately and flush the area with water.

1. Check the coolant level in the expansion tank. With a cold engine, the coolant level should reach the 'UPPER LEVEL' mark above the 'COLD FILL RANGE' sign on the side of the expansion tank. Ignore any amount of coolant at the top of the reservoir.

2. If it is necessary to add coolant, remove the expansion tank cap and add coolant to the 'UPPER LEVEL' mark. For more information refer to Specifications (303-03 Engine Cooling - 4.0L) For more information refer to Specifications (303-03 Engine Cooling - 4.4L).

CAUTION: Always add a 50% mixture of antifreeze and water to the system.

3. Replace the expansion tank cap and close it until it clicks into place.

Coolant replacement

1. Every 10 years or 240,000 km: For more information, refer to Cooling System Draining, Filling and Bleeding (303-03 Engine Cooling - 4.0L). Replace coolant. For more information refer to Cooling System Draining, Filling and Bleeding (303-03 Engine Cooling - 4.4L).