Cooling
WATER PUMP
CO-4
3. Water Pump
The water pump is located in the front portion of the left bank cylinder block and is driven by the
engine through the timing belt. The thermostat is fitted into the coolant inlet at the bottom of the
water pump. When the pump’s impeller rotates, the coolant is drawn into the pump from the lower
pipe (which is connected to the radiator hose) via the thermostat. It then flows along the perimeter
of the impeller and then is discharged for circulation through a circuit depending on the coolant
temperature.
(1) Pulley A: From bypass and/or heater circuit
(2) Ball bearing B: From radiator (when thermostat is open)
(3) Mechanical seal
(4) Impeller
(5) Thermostat
(6) Thermostat case
B
A
H2H2324D
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