Page 179 - 05. Subyek Teknik Mesin - Automobile Mechanical and Electrical Systems Automotive Technology Vehicle Maintenance and Repair (Vehicle Maintenance Repr Nv2) by Tom Denton
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Engine systems 163
Figure 2.163 Water pump in water jacket
Figure 2.164 External water pump
Figure 2.165 Water pump drive gear (cam belt)
Running through the centre of the water pump is a spindle mounted on
a bearing. The bearing is prepacked with grease, and fi tted with seals for
retaining the grease and keeping the coolant in the engine. The drive pulley is
fi tted to the spindle on the outside of the pump. The movement of the impeller
assists coolant fl ow through the water jacket. Water pumps are supplied as
a replacement part fully assembled in a housing holding the bearing, spindle,
impeller and drive fl ange for the pulley ( Figs 2.165 and 2.166 ).
