Mitsubishi S12A2 User Manual

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Chapter 10 COOLING SYSTEM
2.8.1 Water pump Mounted on Engine - Inspect
With fingers, touch the drain pipe located at bottom center
of the water pump case.If water is oozing out, the unit seal is
defective, and if oil is oozing out, the oil seal is defective.
Water pump Mounted on Engine - Inspect
2.8.2 Water pump Pulley - Remove
Install the pulley puller to the holes on the water pump pul-
ley, and remove the water pump pulley.
Water pump Pulley - Remove
2.8.3 Impeller - Remove
(1) Install two nuts to the water pump shaft on the opposite
side of impeller to prevent the shaft from rotating.
(2) Hold the two nuts with a wrench. Loosen the impeller
with a socket (width across flats: 32 mm [1.26 in.]) and
remove it.
Impeller - Remove
2.8.4 Water pump Shaft - Remove
(1) Remove the snap ring from the ball bearing on the
water pump pulley side.
(2) Remove the shaft and ball bearings by pushing the end
face of water pump shaft on the impeller side.
Water pump Shaft - Remove
Pulley puller
M10×1.5mm
Water pump
pulley
When removing the impeller from the water pump
shaft, be careful not to damage the water pump shaft
and impeller.
Water pump
shaft
Impeller
Socket
Width across flat:
32 mm [1.26 in.]
Double nuts
to hold the
shaft
Ball bearing
Water pump
shaft
Ball bearing

Mitsubishi S12A2 Specifications

General

Brand	Mitsubishi
Model	S12A2
Category	Engine
Language	English