Subaru legacy 2003 Service Manual page 22

COOLING
17) Connect water by-pass hose (C) and oil cooler
hose (D).
( A )
18) Install water by-pass pipe, and then install bolt
and clamps. (MT model)
19) Connect connectors to radiator main fan (A)
and sub fan (B) motors.
( A )
20) Install radiator under cover.
21) Install under cover.
22) Lower the vehicle.
23) Connect battery ground cable.
WATER PUMP
( C )
( B )
( D )
CO-00148
CO-00147
( B )
CO-00084
FU-00009
CO(H4DOSTC)-20
24) Fill coolant. <Ref. to CO(H4DOSTC)-15, FILL-
ING OF ENGINE COOLANT, REPLACEMENT,
Engine Coolant.>
C: INSPECTION
1) Check water pump bearing for smooth rotation.
2) Check water pump pulley for abnormalities.
3) Using a dial gauge, measure impeller runout in
thrust direction while rotating the pulley.
"Thrust" runout limit:
0.5 mm (0.020 in)
4) Check clearance between impeller and pump
case.
Clearance between impeller and pump case:
Standard
0.5 — 0.7 mm (0.020 — 0.028 in)
Limit
1.0 mm (0.039 in)
5) After water pump installation, check pulley shaft
for engine coolant leaks. If leaks are noted, replace
water pump assembly.
CO-00028
CO-00029