Cooling System Draining, Filling and Bleeding

Cooling System Draining, Filling and Bleeding

NOTE:
Some variation in the illustrations may occur, but the essential information is always correct.

WARNING: Make sure to support the vehicle with axle stands.
1 Raise and support the vehicle.
For additional information, refer to Engine Cover - 5.0L Service and Repair
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WARNING: Release the cooling system pressure by slowly turning the coolant expansion tank cap a quarter of a turn. Cover the expansion tank cap with a thick cloth to prevent the possibility of scalding. Failure to follow this instruction may result in personal injury.

WARNING: Be prepared to collect escaping fluid.

CAUTION: Since injury such as scalding could be caused by escaping steam or coolant, make sure the vehicle cooling system is cool prior to carrying out this procedure

CAUTION: Be prepared to collect escaping fluids.

CAUTION: Be prepared to collect escaping coolant.

Torque to: 2 Nm

NOTE:
This step is only required if previously removed.

Torque to: 50 Nm
2 Carry out the procedure from step 3 to 15 in the filling section three times, filling the cooling system with clean water after the first two drains. At the third refill, use the equation in step 1 and 2 of the filling section to calculate the volume of coolant required to return the system to a 50% mix.

NOTE:
This step is for calculating the coolant concentration in the cooling system.
Key to letters:
- C = Initial concentration
- T = Total volume
- S = Service drain volume
- R = Remaining volume = T-S
- P = System concentration

Formula:
- P = RC/(S+R)

NOTE:
This step is for calculating the volume of coolant required to return the cooling system to a 50% mix.
Key to letters:
- C = Initial concentration
- T = Total volume
- S = Service drain volume
- P = System concentration
- V = Volume of Coolant Required

Formula:
- V = T/2-P(T-S)/100

CAUTION: Be prepared to collect escaping coolant.
1 Fill the cooling system, keeping coolant to the upper level mark of the expansion tank until a steady stream of coolant is seen running from the coolant hose bleed point.
2 Continue to fill the coolant until the maximum level is reached.
3 Set the heater controls to maximum.
4 Start engine and increase speed to 2000rpm for 2 minutes.
5 Continue to top-up with coolant with engine idling until hot air is emitted from face vents.
6 If no hot air is emitted, repeat step 9.

CAUTION: Correct installation of the Coolant expansion tank cap can be obtained by tightening the cap until an audible click is heard.
7 Switch the heater off.
8 Raise the engine speed to 2000 RPM for eight minutes.

CAUTION: Switch off the engine and allow the coolant temperature to go cold.
9 Switch the engine off and allow to cool.

10 Visually check the engine and cooling system for signs of coolant leakage.

WARNING: When releasing the cooling system pressure, cover the coolant expansion tank cap with a thick cloth.

CAUTION: Since injury such as scalding could be caused by escaping steam or coolant, make sure the vehicle cooling system is cool prior to carrying out this procedure

CAUTION: Make sure the coolant level remains above the "COLD FILL RANGE" lower level mark.

NOTE:
When the cooling system is warm, the coolant will be approximately 10mm above the upper level mark on the expansion tank with the cap removed.

11 Check and top-up the coolant if required.
For additional information, refer to Radiator Splash Shield Radiator Splash Shield
For additional information, refer to Secondary Bulkhead Panel RH Secondary Bulkhead Panel RH
For additional information, refer to Engine Cover - 5.0L Service and Repair