2010 JAGUAR XFR Workshop Manual

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Page 1113 of 3039

JAGUAR XFR 2010 1.G Workshop Manual 1 Heater core 2 Bleed screw 3 RH cylinder head 4 Cylinder block 5 Throttle 6 Engine oil cooler 7 Heater manifold 8 LH cylinder head 9 Expansion tank 10 Transmission fluid cooler 11 Thermostat 12 Check

Page 1114 of 3039

JAGUAR XFR 2010 1.G Workshop Manual 14 Radiator 15 Auxiliary radiator 16 Connection with supercharger cooling system
System Operation
When the engine is running, the coolant is circulated around the engine cooling system by the coola

14 Radiator 15 Auxiliary radiator 16 Connection with supercharger cooling system
System Operation
When the engine is running, the coolant is circulated around the engine cooling system by the coolant pump. From the coolant
pump, coolant flows through the cylinder heads and the engine oil cooler into the cylinder block and the heater manifold.

In the cylinder block, the coolant flows forwards to the outlet tube. When the coolant is cold, the thermostat is closed and the
coolant flows direct from the outlet tube back to the coolant pump. Once the coolant reaches operating temperature the
thermostat begins to open, to control system temperature, and coolant flows from the outlet tube to the coolant pump via the
radiator and, on SC (supercharger) vehicles, the auxiliary radiator. When the thermostat is open, the coolant flow through the
radiator(s) also generates a coolant flow through the transmission fluid cooler.

From the heater manifold the coolant flows through the electronic throttle and the heater core, in parallel circuits that are
unaffected by the position of the thermostat. From the electronic throttle, the coolant merges with bleed coolant from the
coolant pump and the outlet tube and flows to the expansion tank. From the heater core, the coolant flows back to the inlet of
the coolant pump.

Expansion and contraction of the coolant is accommodated by an air space in the expansion tank and the compliance of the
flexible hoses.

If the coolant level in the expansion tank decreases below a predetermined value, the level sensor connects a ground to the
instrument cluster, which activates the appropriate warning. For additional information, refer to 413-01 Instrument Cluster.

The cooling fan is operated by a fan control module integrated into the cooling fan motor. The fan control module regulates the
voltage, and thus speed, of the cooling fan motor in response to a PWM (pulse width modulation) signal from the ECM (engine
control module).

The cooling fan receives a battery feed and an ignition feed from the EJB (engine junction box). The ignition feed is supplied
from the main relay in the EJB, which is controlled by the ECM.
The ECM calculates the required fan speed from the engine temperature, A/C (air conditioning) system pressure and transmission fluid temperature. Under hot operating conditions, the fan may continue to operate for 4 minutes after the engine
has been switched off.

COOLANT PUMP Component Description

Item Description 1 Inlet connection 2 Pump body 3 Outlet flange to RH cylinder head 4 Outlet to engine oil cooler 5 Outlet flange to LH cylinder head

Page 1115 of 3039

JAGUAR XFR 2010 1.G Workshop Manual 7 Bleed pipe connection (containing check valve) The body of the coolant pump contains an impeller attached to a shaft supported in a bearing assembly. The impeller is driven
by a pulley, pressed on

Page 1116 of 3039

JAGUAR XFR 2010 1.G Workshop Manual 1 Locating spigot (2 off) 2 Upper hose connection 3 Supercharger cooling system connection 4 Auxiliary radiator inlet hose connection 5 Support (2 off) 6 Drain plug 7 Lower hose connection 8 Auxiliary

Page 1117 of 3039

JAGUAR XFR 2010 1.G Workshop Manual 1 Return hose connection 2 Supply hose connection 3 Bottom bracket 4 Top bracket The auxiliary radiator is connected in parallel with the (main) radiator to increase the engine cooling capacity on SC

Page 1118 of 3039

JAGUAR XFR 2010 1.G Workshop Manual 1 Shroud 2 Motor and fan control module 3 Harness 4 Fan An electric, variable speed cooling fan is installed in a shroud attached to the rear of the radiator. The cooling fan is operated
by a fan con

Page 1119 of 3039

JAGUAR XFR 2010 1.G Workshop Manual

Item Description 1 Filler cap 2 Vent hose connection 3 Expansion hose connection 4 Level sensor The expansion tank is installed in the engine compartment, on the LH upper suspension housing.
A

Page 1120 of 3039

JAGUAR XFR 2010 1.G Workshop Manual A Outlet tube on naturally aspirated vehicles B Outlet tube on supercharger vehicles 1 Bleed hose connection 2 Radiator upper hose connection 3 Cylinder block connections 4 Thermostat hose connection

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