Subaru Legacy (2005 year). Manual - part 85

CO(H4SO 2.0)-15

COOLING

Water Pump

4. Water Pump

A: REMOVAL

1) Remove the radiator. <Ref. to CO(H4SO 2.0)-
20, REMOVAL, Radiator.>
2) Remove the V-belt. <Ref. to ME(H4SO 2.0)-37,
REMOVAL, V-belt.>
3) Remove the timing belt. <Ref. to ME(H4SO 2.0)-
43, TIMING BELT, REMOVAL, Timing Belt.>
4) Remove the automatic belt tension adjuster.

5) Remove the belt idler No. 2.

6) Remove the cam sprocket (LH) using ST.
ST

18231AA010

CAM SPROCKET WRENCH

NOTE:
CAM SPROCKET WRENCH (499207100) can
also be used.

7) Remove the belt cover No. 2 (LH).

8) Remove the tensioner bracket.

9) Disconnect the hose from water pump.
10) Remove the water pump.

B: INSTALLATION

1) Install the water pump onto cylinder block (LH).

NOTE:
• Use a new gasket.
• When installing the water pump, tighten the bolts
in two stages in alphabetical sequence as shown in
figure.

CO-00016

CO-00017

CO-00018

S T

CO-00019

CO-00020

CO-00021

CO(H4SO 2.0)-16

COOLING

Water Pump

Tightening torque:

First

12 N

⋅

m (1.2 kgf-m, 8.9 ft-lb)

Second

12 N

⋅

m (1.2 kgf-m, 8.9 ft-lb)

2) Connect the hose to the water pump.
3) Install the tensioner bracket.

Tightening torque:

24.5 N

⋅

m(2.5 kgf-m, 18.1 ft-lb)

4) Install the belt cover No. 2 (LH).

Tightening torque:

5 N

⋅

m (0.5 kgf-m, 3.7 ft-lb)

5) Install the cam sprocket (LH) using ST.
ST

18231AA010

CAM SPROCKET WRENCH

NOTE:
CAM SPROCKET WRENCH (499207100) can
also be used.

Tightening torque:

78 N

⋅

m (8.0 kgf-m, 57.9 ft-lb)

6) Install the belt idler No. 2.

Tightening torque:

39 N

⋅

m (4.0 kgf-m, 28.9 ft-lb)

7) Install the automatic belt tension adjuster which
tension rod is held with pin. <Ref. to ME(H4SO
2.0)-44, AUTOMATIC BELT TENSION ADJUST-
ER ASSEMBLY AND BELT IDLER, INSTALLA-
TION, Timing Belt.>
8) Install the timing belt. <Ref. to ME(H4SO 2.0)-
45, TIMING BELT, INSTALLATION, Timing Belt.>
9) Install the V-belts. <Ref. to ME(H4SO 2.0)-37,
INSTALLATION, V-belt.>
10) Install the radiator. <Ref. to CO(H4SO 2.0)-21,
INSTALLATION, Radiator.>

C: INSPECTION

1) Check the water pump bearing for smooth rota-
tion.
2) Check the water pump pulley for abnormalities.
3) Make sure the impeller is not deformed or dam-
aged.
4) Inspect the clearance between impeller and
pump case.

ME-02463

(F)

(E)

(D)

(C)

(B)

(A)

CO-00020

CO-00019

CO-00018

S T

CO-00017

CO(H4SO 2.0)-17

COOLING

Water Pump

Clearance between impeller and pump case:

Specification

0.5

 — 

1.5 mm (0.020

 — 

0.059 in)

5) After water pump installation, check the pulley
shaft for engine coolant leaks and noise. If leaks or
noise are noted, replace the water pump assembly.

CO-00293

CO(H4SO 2.0)-18

COOLING

Thermostat

5. Thermostat

A: REMOVAL

1) Set the vehicle on a lift.
2) Lift-up the vehicle.
3) Remove the under cover.
4) Drain engine coolant completely. <Ref. to
CO(H4SO 2.0)-13, DRAINING OF ENGINE
COOLANT, REPLACEMENT, Engine Coolant.>

5) Disconnect the radiator outlet hose from thermo-
stat cover.

6) Remove the thermostat cover and gasket, and
then remove the thermostat.

B: INSTALLATION

1) Install a gasket to thermostat, and install the
thermostat and gasket to water pump as a unit.
Then, install the thermostat cover.

NOTE:
• When reinstalling the thermostat, use a new gas-
ket.
• The thermostat must be installed with the jiggle
pin facing to the up side.

(A) Drain plug

(B) Heat shield cover

CO-00268

(A)

(B)

CO-00270

(A) Thermostat cover

(B) Gasket

(C) Thermostat

CO-00154

(A)

(C)

(B)