Refilling Cooling System

1. Pour in the appropriate quantity of undiluted D542 Antifreeze into the coolant reservoir:

4.0 Liter Naturally Aspirated Models: 6.5 liters

4.0 Liter Supercharged XJR Models: 7.0 liters

6.0 Liter XJ12 Models: 8.75 liters

Continue to fill the system fully, using plain clean water, until the level reaches MAX.

2. Without installing the coolant reservoir pressure cap, and with the Climate Control switched OFF, start and run the engine at idling speed. Check the level of coolant in the coolant reservoir as air is purged from the cooling system. Top off with plain clean water as necessary.

3. Increase the engine speed to approximately 2000 rpm to promote more rapid heating of the coolant, until normal running temperature is attained.

4. Switch the Climate Control to ON, temperature to HI and fan speed to a "Medium" setting. Run the engine at approximately 2000 rpm for a further 4 minutes. Ensure that the heater outlet temperature at the footwell ducts is now hot or very hot.

5. Switch off the engine and allow it to stand for 1 minute. Add plain water to the coolant reservoir to bring the level to 10 mm above MAX marking. Run the engine at idling speed for 30 seconds to circulate coolant.

6. Take a coolant sample from the coolant reservoir. Using a temperature compensated coolant tester, check that the concentration of coolant now corresponds to: 50% +/- 5% Antifreeze by volume, or that the coolant provides protection to -35°C (-31°F). If necessary, drain a quantity of coolant and add antifreeze to the system to adjust the concentration.

7. Install a coolant reservoir label (Part No. MNA 7698AA) on the neck of the coolant reservoir and reinstall the filler cap.

NOTE:
Ensure that ONLY Jaguar D542 antifreeze is used in any subsequent topping up, should this be necessary, on any vehicle which has been reworked by the above procedure, or where the antifreeze has been changed to D542 specification during the course of some other repair operation.

Jaguar D542 antifreeze may be recognized by its yellow color. It is permissible to use it to top off vehicles filled with the earlier D985 antifreeze, which may be recognized by its blue/green color. D985 antifreeze, however, must NEVER be used to top off a cooling system filled with the yellow D542 solution.