Coolant Pump And Flow Control
WARNING: This page is about a different car, the 2002 Jaguar XKR and 2002 Jaguar XK8. However, it is still accessible from the selected car via links, so may be relevant.
The water pump is fitted between the two cylinder banks, on the front face of the cylinder block.
The pump consists of a housing containing a shaft, with a shrouded plastic impeller on one end and a drive pulley on the other.
A pair of roller bearings support the shaft in the housing. A seal behind the impeller prevents coolant from contaminating the bearings. Should this seal fail, coolant escapes from a witness hole in the housing indicating that immediate action is required.
An O-ring and an aluminum-alloy gasket, seal the ports between the pump and the cylinder banks.