Grand Cherokee 2WD V8-4.7L VIN J (2004)
Water Pump: Description and Operation
Water Pump
WATER PUMP 4.7L
DESCRIPTION-WATER PUMP
A centrifugal water pump circulates coolant through the water jackets, passages, intake manifold, radiator core, cooling system hoses and heater core.
The pump is driven from the engine crankshaft by a single serpentine drive belt.
The water pump impeller is pressed onto the rear of a shaft that rotates in bearings pressed into the housing. The housing has two small holes to allow
seepage to escape. The water pump seals are lubricated by the antifreeze in the coolant mixture. No additional lubrication is necessary.
Both heater hoses are connected to fittings on the timing chain front cover. The water pump is also mounted directly to the timing chain cover and is
equipped with a nonserviceable integral pulley.
OPERATION-WATER PUMP
A centrifugal water pump circulates coolant through the water jackets, passages, intake manifold, radiator core, cooling system hoses and heater core,
this coolant absorbs the heat generated when the engine is running. The pump is driven by the engine crankshaft via a drive belt.
