1999 SUBARU LEGACY radiator

2) Release harness from shroud.
B2M2048
3) Remove bolts which install fan motor onto
shroud.
B2M2049
4) Assembly is in the reverse order of disassem-
bly.
Tightening torque:
4.4
±0.5 N´m (0.45±0.05 kg-m, 3.3±0.4 ft-lb)
B2M2049
2. 2500 cc MODEL
1) Remove clip which holds motor harness onto
shroud.
S2M0038A
2) Cut band which holds motor harness on
shroud.
S2M0039
3) Remove bolts which install fan motor onto
shroud.
S2M0040
20
2-5[W6B2]SERVICE PROCEDURE
6. Radiator Main Fan and Fan Motor

4) Installation is in the reverse order of removal.
Tightening torque:
4.4
±0.5 N´m (0.45±0.05 kg-m, 3.3±0.4 ft-lb)
S2M0040
7. Radiator Sub Fan and Fan
Motor
A: REMOVAL AND INSTALLATION
1) Disconnect battery ground cable.
B2M1723
2) Lift-up the vehicle.
3) Remove under cover.
B2M0014
4) Disconnect connector of sub fan motor.
B2M2050
21
[W7A0]2-5SERVICE PROCEDURE
7. Radiator Sub Fan and Fan Motor

4) Installation is in the reverse order of removal.
Tightening torque:
4.4
±0.5 N´m (0.45±0.05 kg-m, 3.3±0.4 ft-lb)
S2M0040
7. Radiator Sub Fan and Fan
Motor
A: REMOVAL AND INSTALLATION
1) Disconnect battery ground cable.
B2M1723
2) Lift-up the vehicle.
3) Remove under cover.
B2M0014
4) Disconnect connector of sub fan motor.
B2M2050
21
[W7A0]2-5SERVICE PROCEDURE
7. Radiator Sub Fan and Fan Motor

5) Remove bolt which installs the under side of
radiator sub fan shroud onto radiator.
B2M2051
6) Lower the vehicle.
7) Remove V-belt covers.
B2M2307
8) Remove two bolts holding shroud to radiator
upper side.
B2M2052
9) Remove bolts which install the right side of
radiator sub fan shroud onto radiator.
B2M2053
10) Move radiator sub fan motor assembly to left
side, and remove it.
B2M2054
11) Installation is in the reverse order of removal.
Tightening torque:
7.4
±2.0 N´m (0.75±0.20 kg-m, 5.4±1.4 ft-lb)
B2M2052
B: DISASSEMBLY AND ASSEMBLY
1) Remove clip which holds motor harness onto
shroud.
B2M2047
22
2-5[W7B0]SERVICE PROCEDURE
7. Radiator Sub Fan and Fan Motor

5) Disconnect heater inlet hose.
B2M0138
6) Disconnect radiator inlet hose from water pipe.
B2M0139
7) Remove bolts which install water pipe on cylin-
der block.
B2M0141
B: INSTALLATION
1) Install water pipe on cylinder block.
Tightening torque:
6.4
±0.5 N´m (0.65±0.05 kg-m, 4.7±0.4 ft-lb)
CAUTION:
Use a new O-ring.
B2M0141
2) Connect radiator inlet hose.
B2M0139
3) Connect heater inlet hose.
B2M0138
24
2-5[W8B0]SERVICE PROCEDURE
8. Water Pipe

9. Reservoir Tank
A: REMOVAL AND INSTALLATION
1) Disconnect over flow hose from radiator filler
neck position.
B2M2056
2) Remove bolts which install reservoir tank onto
radiator main fan shroud.
B2M2042
3) Remove reservoir tank.
S2M0028
4) Installation is in the reverse order of removal.
Tightening torque:
7.4
±2.0 N´m (0.75±0.20 kg-m, 5.4±1.4 ft-lb)
B2M2042
25
[W9A0]2-5SERVICE PROCEDURE
9. Reservoir Tank

1. Engine Cooling System Trouble in General
TroubleCorrective action
Over-heatinga. Insufficient engine coolantReplenish engine coolant, inspect for leakage, and
repair.
b. Loose timing belt Repair or replace timing belt tensioner.
c. Oil on drive belt Replace.
d. Malfunction of thermostat Replace.
e. Malfunction of water pump Replace.
f. Clogged engine coolant passage Clean.
g. Improper ignition timingInspect and repair ignition control system.
On-Board Diagnostics II System
h. Clogged or leaking radiator Clean or repair, or replace.
i. Improper engine oil in engine coolant Replace engine coolant.
j. Air/fuel mixture ratio too leanInspect and repair fuel injection system.
On-Board Diagnostics II System
k. Excessive back pressure in exhaust system Clean or replace.
l. Insufficient clearance between piston and cylinder Adjust or replace.
m. Slipping clutch Repair or replace.
n. Dragging brake Adjust.
o. Improper transmission oil Replace.
p. Defective thermostat Replace.
q. Malfunction of electric fanInspect radiator fan relay, engine coolant temperature
sensor or radiator motor and replace there.
Over-coolinga. Atmospheric temperature extremely low Partly cover radiator front area.
b. Defective thermostat Replace.
Engine coolant
leaks.a. Loosened or damaged connecting units on
hosesRepair or replace.
b. Leakage from water pump Replace.
c. Leakage from water pipe Repair or replace.
d. Leakage around cylinder head gasket Retighten cylinder head bolts or replace gasket.
e. Damaged or cracked cylinder head and crank-
caseRepair or replace.
f. Damaged or cracked thermostat case Repair or replace.
g. Leakage from radiator Repair or replace.
Noisea. Defective drive belt Replace.
b. Defective radiator fan Replace.
c. Defective water pump bearing Replace water pump.
d. Defective water pump mechanical seal Replace water pump.
26
2-5[K100]DIAGNOSTICS
1. Engine Cooling System Trouble in General

5) Disconnect connector from idle air control sole-
noid valve.
S2M0099
6) Disconnect PCV hose (A) and pressure regula-
tor vacuum hose (B).
H2M2440A
7) Disconnect air by-pass hose from idle air con-
trol solenoid valve.
S2M0100
8) Remove bolts which install idle air control sole-
noid valve to throttle body.
B2M0166
9) Disconnect engine coolant hoses from idle air
control solenoid valve, and take them off.
S2M0101
10) Installation is in the reverse order of removal.
CAUTION:
Replace gasket with a new one.
Tightening torque:
6.4
±0.5 N´m (0.65±0.05 kg-m, 4.7±0.4 ft-lb)
B2M0166
B: CLEANING (2500 cc MODEL
ONLY)
1) Start and warm-up the engine until radiator fan
operates.
2) Hold throttle valve to keep the engine speed at
2,000 rpm.
B2M0357
77
[W12B0]2-7SERVICE PROCEDURE
12. Idle Air Control Solenoid Valve