Cooling System Backflushing

Cooling System Backflushing

CAUTION: The heater core must be backflushed separately from the engine cooling system to prevent the engine cooling system particles from clogging the heater core tubes and reducing (or eliminating) coolant flow through the heater core.

CAUTION: Heater core internal pressure must not exceed 100 kPa (14.5 psi). Failure to follow this instruction may cause damage to the heater core.

NOTE: Cooling system backflushing should be carried out before the cooling system components are installed after the cooling system flushing procedure.

1. Disconnect the heater outlet coolant hose from the engine and connect the heater hose to a suitable hose pipe.
2. Disconnect the heater inlet coolant hose from the engine and allow the coolant to drain into a suitable container.
3. Turn the water supply valve to the hose ON and allow water pressure to flow through the heater core.
4. Allow water pressure to flow through the heater core for approximately five minutes.
5. Turn the water supply valve to the hose OFF and disconnect the hose pipe from the heater hose.
6. Connect the heater inlet coolant hose to the engine.
7. Connect the heater outlet coolant hose to the engine.
8. Fill the cooling system as described using a 50 mixture of Jaguar Premium Cooling System Fluid, or equivalent meeting Jaguar specification ESE-M97B44-A and 50 distilled water.
9. Test the system for correct heater performance with the specified engine cooling system conditions.

Radiator Backflushing

1. Remove the radiator.
2. Invert the radiator.
3. Connect a suitable hose pipe to the lower coolant hose connection of the radiator.
4. Turn the water supply valve to the hose ON and allow water pressure to flow through the radiator.
5. Allow water pressure to flow through the radiator for approximately five minutes.
6. Turn the water supply valve to the hose OFF and disconnect the hose pipe from the radiator.
7. Allow the coolant to drain from the radiator.
8. Install the radiator.

Engine Backflushing

NOTE: Make sure that the thermostat is removed before backflushing the engine.

1. Position the high-pressure water hose into the engine through the engine return and backflush the engine.
2. Connect a suitable hose pipe to the upper coolant hose connection of the engine.
3. Turn the water supply valve to the hose ON and allow water pressure to flow through the engine.
4. Allow water pressure to flow through the engine for approximately five minutes.
5. Turn the water supply valve to the hose OFF and disconnect the hose pipe from the upper coolant hose connection of the engine.
6. Connect the upper coolant hose to the engine.
7. Fill the cooling system as described using a 50 mixture of Jaguar Premium Cooling System Fluid or equivalent, meeting Jaguar specification ESE-M97B44-A and 50 distilled water.