Engine System - Operation/Cooling system CTM3274 (01JUL99) 205-7 Saran Liter Engines 060799 PN=320 COOLING SYSTEM (4-CYLINDER ENGINE) -UN-08MAR95 CD30331 1—Thermostats 3—Oil cooler 5—Return flow to water 6—Water pump 2—Radiator 4—Coolant flow to oil cooler pump The principal components of the pressure cooling Here it circulates through the block and around the system are the radiator, water pump, multi-blade fan cylinder liners. From the cylinder block, coolant is and thermostats. then directed through the cylinder head and into thermostat housing.
With the thermostats open, During the warm-up period, thermostats (1) remain coolant passes through the housing and upper closed and coolant is directed through a by-pass to radiator hose into top of radiator (2) where it is suction side of water pump (6). The coolant then circulated to dissipate heat. circulates through the cylinder block and water pump only to provide a uniform and fast warm-up period. On some engines the water pump has two further hose connectors (4) and (5) which lead to the engine Once the engine has reached operating temperature, oil cooler (3). the thermostats open and coolant is pumped from bottom of radiator via bottom hose into the cylinder block.
CD,3274,G205,4 -19-03NOV92 205 7