1.05L REVOTORQ ENGINE
75
Testing Parameters :
Thermostat start open temperature is 86º to
90ºC at 0.1mm travel.
Full open travel of 8 mm (Min.) at tempera-
ture is 100º C
Leakage through main valve at room tem-
perature and 0.3 kg/cm
2
is 1500cc/min MAX.
D. Water Pump :
The water pump is a simple centrifugal pump driven
by belt. The pump circulates the engine coolant
when it is driven by the engine.
The water pump uses centrifugal force to send fluid
to the outside while it spins, causing fluid to be
drawn from the center continuously. The inlet to the
pump is located near the center so that fluid return-
ing from the radiator hits the pump vanes. The
pump vanes fling the fluid to the outside of the
pump, where it can enter the engine.
The fluid leaving the pump flows first through the
engine block and cylinder head, then into the radia-
tor and finally back to the pump.
Water pump flow Characteristics
Pump Speed
in RPM
Discharge in
LPM
Inlet Pressure
in Bar
4200
120
1.2