Cooling System: Description and Operation

Engine Cooling Components
Engine cooling is via a low-volume, high-velocity system which achieves a very fast warm-up with both reduced and even metal temperatures in the combustion chamber and increased bore temperatures.

From the pump, coolant flows into each bank of the cylinder block. In each bank, 50% of the coolant cools the cylinder bores and 50% is diverted through the bypass gallery.

At the rear of the banks, the two flows mix and enter the outlet ports.

With thermostat closed, coolant returns directly to the pump through the bypass on the thermostat housing.

With the thermostat open, coolant returns to the pump via the radiator.

The cooling system uses a mixture of water and Jaguar Anti-Freeze, coolant and corrosion inhibitor.

Engine Coolant Heating Element
This is a full scavenge-type heater circuit including a bypass with a non-return valve. At low engine speeds water flow in the engine is lower than that produced by the auxiliary water pump, and the non-return valve (positioned in the engine-cooling circuit) prevents the heater pump recirculating the water to the inlet-side of the heater.