General procedures
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. All engine
cooling system flushing and backflushing procedures must include a separate
backflushing of the heater core after the flushing or backflushing of the engine cooling
system.
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