4-10 COOLING SYSTEM
Water Pump Removal
Refer to the Oil Pump Removal in the Engine Lubrication
Water Pump Installation
Refer to the Oil Pump Installation in the Engine Lubrica-
tion System chapter.
Water Pump Impeller Disassembly/Assembly
The sealing seat and rubber seal may be removed easily
Apply coolant around the surfaces of the rubber seal and
Install the rubber seal [A] and sealing seat [B] into the
impeller by pressing them by hand until the seat stops at
the bottom of the hole.
Tighten the impeller bolt by special torque.
Torque - Impeller Bolt: 9.8 N·m (1.0 kgf·m, 87 in·lb)
Water Pump Impeller Inspection
Check the drainage outlet passage [A] at the bottom of
the water pump body for coolant leaks.
If the mechanical seal is damaged, the coolant leaks
through the seal and drains through the passage. Re-
place the mechanical seal unit (see Water Pump Housing
Disassembly/Assembly in this chapter).
Visually inspect the impeller [A].
If the surface is corroded, or if the blades are damaged,
replace the impeller.
Water Pump Housing Disassembly
Do not damage the hole wall of the water pump
Insert a bar [A] into the pump housing [B], and hammer
evenly around the circumference of the mechanical seal