Draining And Filling The High Temperature (Ht) Cooling System

DRAINING PROCEDURE 

1. Raise and support the vehicle. Refer to HOISTING, STANDARD PROCEDURE .
2. Remove the engine belly pan. Refer to BELLY PAN, ENGINE, REMOVAL AND INSTALLATION or BELLY PAN, REAR, REMOVAL AND INSTALLATION or BELLY PAN, SIDE, REMOVAL AND INSTALLATION .

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   WARNING:

   DO NOT REMOVE THE COOLING SYSTEM PRESSURE CAP WITH THE SYSTEM HOT AND UNDER PRESSURE BECAUSE SERIOUS BURNS FROM COOLANT CAN OCCUR.

3. With the engine cold, remove the HT coolant reservoir cap (1).

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4. Position a suitable container for collecting the coolant.
5. Open the primary HT radiator drain plug (1).

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6. Open the secondary HT radiator drain plug (1).
7. When they are completely drained, close the plugs of the two radiators.

FILLING PROCEDURE 

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1. Open the bleed screw (1) on the primary HT radiator.

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2. Open the bleed screw (1) on the secondary HT radiator.

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3. Open the bleed screw on the heater core return pipe (1).

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4. Install the 2000040987 measuring container on the filler of the coolant reservoir (1).
5. Fill the cooling system with prescribed coolant until fluid is coming out of the three bleed screws and tighten the bleed screws. Refer to CAPACITIES AND RECOMMENDED FLUIDS, SPECIFICATIONS .
6. At this point, the level in the reservoir will be flush with the filler.
7. Close the coolant reservoir cap.
8. Start up the engine and let it idle for about two minutes.
9. Remove the air from the cooling system by pumping the accelerator regularly and gradually (every 30 seconds) up to a speed of around 2500 rpm. This operation must be carried out so that the thermostat opens and the fan switches on and off at least 3 times. During this operation, keep the climate control system switched off to prevent the fan coming on not due to the heating of the coolant.
   NOTE:

   If there is a noticeable level drop in the coolant reservoir during this step, switch off the engine, open the cap very carefully and top up the fluid to the MAX mark; then close the cap fully and complete bleeding the air from the system with the engine running.

10. Switch off the engine.

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11. After allowing the engine to cool, check that the fluid level is at the MAX mark on the coolant reservoir.
12. Install the engine belly pan. Refer to BELLY PAN, ENGINE, REMOVAL AND INSTALLATION or BELLY PAN, REAR, REMOVAL AND INSTALLATION or BELLY PAN, SIDE, REMOVAL AND INSTALLATION .
13. Remove the support and lower the vehicle.