Radiator Mounting
The radiator is mounted on four rubber mounts, one on each end of the upper and lower face. A closing panel which retains the radiator assembly, fits over the top of the radiator and is secured to the vehicle body.
Coolant Expansion Tank and Degas Bottle
A coolant recovery system is used, which comprises a coolant expansion tank and degas bottle. The degas bottle is located at the rear of the right hand front wheel arch.
The expansion tank provides the cooling system filling point and carries the coolant level sensor. The pressure cap allows controlled release of coolant to the degas bottle during normal operation.
The degas bottle accommodates the expansion of the system coolant during normal operation. On engine cool-down, the coolant contracts and is returned to the main system.
Cooling Fans
The two radiator cooling fans are mounted in a twin fan and motor assembly between the radiator and the engine.
The fans are controlled by the fan control module dependent on the demand from the cooling system (temperature) or the air conditioning system (pressure).
The fan control module is located on the twin fan and motor shroud. The fan speeds are controlled by the variable pulse width modulated (PWM) module.
Under hot operating conditions, the fans may continue to operate for some time after the engine has been switched off, but will stop automatically when the coolant temperature has been sufficiently reduced.
Scheme 39
Scheme 40
The engine coolant temperature (ECT) sensor is located in the coolant outlet pipe and reacts to engine coolant temperature changes, providing an input to the Engine Control Module (ECM). The sensor has a negative temperature coefficient so that the sensor resistance decreases as temperature rises.
Cooling System Backflushing - General Procedures
| 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.
- Disconnect the heater outlet coolant hose from the engine and connect the heater hose to a suitable hose pipe.
- Disconnect the heater inlet coolant hose from the engine and allow the coolant to drain into a suitable container.
- Turn the water supply valve to the hose ON and allow water pressure to flow through the heater core.
- Allow water pressure to flow through the heater core for approximately five minutes.
- Turn the water supply valve to the hose OFF and disconnect the hose pipe from the heater hose.
- Connect the heater inlet coolant hose to the engine.
- Connect the heater outlet coolant hose to the engine.
- Fill the cooling system as described using a 50% mixture of Jaguar Premium Cooling System Fluid, or equivalent meeting Jaguar specification WSS M97B44-D and 50% distilled water.
- Test the system for correct heater performance with the specified engine cooling system conditions.
Radiator Backflushing
- Remove the radiator. Refer to «Radiator - Removal and Installation (Vehicles Without: Supercharger)»(ref-311046-S32264228142009032300000) or «Radiator - Removal and Installation (Vehicles With: Supercharger)»(ref-311046-S38607990712009032300000) .
- Invert the radiator.
- Connect a suitable hose pipe to the lower coolant hose connection of the radiator.
- Turn the water supply valve to the hose ON and allow water pressure to flow through the radiator.
- Allow water pressure to flow through the radiator for approximately five minutes.
- Turn the water supply valve to the hose OFF and disconnect the hose pipe from the radiator.
- Allow the coolant to drain from the radiator.
- Install the radiator. Refer to «Radiator - Removal and Installation (Vehicles Without: Supercharger)»(ref-311046-S32264228142009032300000) or «Radiator - Removal and Installation (Vehicles With: Supercharger)»(ref-311046-S38607990712009032300000) .
Engine Backflushing
- Remove the thermostat before backflushing the engine. Refer to «Thermostat - Removal and Installation (Vehicles Without: Supercharger)»(ref-311046-S42834554692009032300000) or «Thermostat - Removal and Installation (Vehicles With: Supercharger)»(ref-311046-S24329315172009032300000) .
- Position the high-pressure water hose into the engine through the engine return and backflush the engine.
- Connect a suitable hose pipe to the upper coolant hose connection of the engine.
- Turn the water supply valve to the hose ON and allow water pressure to flow through the engine.
- Allow water pressure to flow through the engine for approximately five minutes.
- Turn the water supply valve to the hose OFF and disconnect the hose pipe from the upper coolant hose connection of the engine.
- Connect the upper coolant hose to the engine.
- Fill the cooling system as described using a 50% mixture of Jaguar Premium Cooling System Fluid or equivalent, meeting Jaguar specification WSS M97B44-D and 50% distilled water.