Engine Cooling System - Subaru XT 1988 Service Manual

ENGINE COOLING SYSTEM
2-5
8
L2·568
Fig. 11
Be su re to install a new mechanical seal.
2}
Press the seal into the pump case with the carbon washer
of the seal facing the impeller.
3)
Apply coolant on the sliding surface between mechanical
seal and impeller.
With a thin coat of oil on the shaft surface, install the impeller
onto the pump shaft with a press.
~'\'J.,~=~q~~-Impeller
L2-054
Fig. 12
4)
Check for the following clearance after installation and
correct if defective.
Clearance between impeller and pump case:
0.5 - 0.9 mm (0.020 - 0.035 in)
11
Fig. 13
5) Before pressing, apply oil on the pump shaft.
Support the impeller side of the pump shaft end and install
the hub by using a press until the distance "L" between the
pump case surface, which mates with the gasket, and the
pulley attaching surface of the hub becomes specified value.
After pressing water pump hub into place, measure "run out".
If it exceeds 0.05 mm (0.0020 in), replace water pump ASSY.
"L":
1800 cc model
2700 cc model
Fig. 14
103.6 - 104.2 mm (4.08 - 4.10 in)
113.8 - 114.2 mm (4.48 - 4.50 in)
L
L2·569
6) looking through slit in water pump case, ensure that
groove on water pump case is aligned with groove on outer
surface of shaft.
Insert water pump clip into grooves and drive it into place
with a plastic hammer.