Expansion tank (Freelander 2)

An expansion tank is built into the system to provide sufficient space for the coolant to expand and to allow air and gas present in the coolant to escape from the coolant. Air bleed lines connect the tank to the thermal control module and the radiator.

The coolant level is monitored by an integral float type sensor located in the expansion tank. The coolant level sensor is connected to the CJB. On vehicles equipped with a "low series" instrument cluster, if the coolant level falls below the level of the sensor, the low engine coolant level warning lamp illuminates.

On vehicles equipped with a "high series" instrument cluster, a low coolant level message is displayed in the message center. For more information, refer to the chapter:

• Instrument cluster (413-01 Instrument cluster, Description and operating principle)
• Information and Message Center (413-08 Information and Message Center, Description and Operating Principle)

The tank is sealed with a threaded cap and serves to fill the system during maintenance. A safety valve is built into the tank cap, which protects the cooling system from excess pressure.