Water Pump - Jeep 1997 Grand Cherokee Service Manual

ZG
GENERAL INFORMATION (Continued)
normal operating temperature. The coolant tank is
equipped with a cam type pressure/vent cap. Refer to
Pressure/Vent Cap for additional information.
A separate coolant reserve/overflow tank is not
used with this system.
The low coolant level sensor is located on the bot-
tom of the tank (Fig. 2).

WATER PUMP

A centrifugal water
through the water jackets, passages, water manifold,
radiator core, pressurized coolant tank, cooling sys-
tem hoses and heater core. The pump is driven from
the engine crankshaft by a drive belt. The water
pump is bolted to the water pump adapter (Fig. 3).
The water pump adapter is bolted to the engine.
The water pump impeller is pressed onto the rear
of a shaft that rotates in bearings pressed into the
housing. The bottom of the housing is equipped with
a small vent tube (Fig. 3) to allow seepage to escape.
A drain hose is attached to this tube. The water
pump seals are lubricated by the antifreeze in the
coolant mixture. No additional lubrication is neces-
sary.
A rubber o-ring (instead of a gasket) is used as a
seal between the water pump and the water pump
adapter (Fig. 3).
Fig. 2 Coolant Tank and Radiator Hoses
pump circulates coolant
COOLING SYSTEM
Fig. 3 Water Pump— Typical
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