1999 SUBARU LEGACY coolant

9) Connect radiator outlet hose.
H2M2515
10) Install under cover.
B2M0014
11) Lower the vehicle.
12) Install V-belt covers.
B2M2307
13) Connect battery ground cable.
B2M1723
14) Fill coolant.
B2M0135
17
[W4B0]2-5SERVICE PROCEDURE
4. Radiator

2) Release motor harness from shroud.
B2M2048
3) Remove bolts which install fan motor onto
shroud.
B2M2055
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)
B2M2055
8. Water Pipe
A: REMOVAL
1) Release fuel pressure.

2) Disconnect ground cable from the battery.
G6M0095
3) Drain engine coolant completely.

B2M0015A
4) Remove intake manifold.

B2M0160
23
[W8A0]2-5SERVICE PROCEDURE
8. Water Pipe

2) Release motor harness from shroud.
B2M2048
3) Remove bolts which install fan motor onto
shroud.
B2M2055
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)
B2M2055
8. Water Pipe
A: REMOVAL
1) Release fuel pressure.

2) Disconnect ground cable from the battery.
G6M0095
3) Drain engine coolant completely.

B2M0015A
4) Remove intake manifold.

B2M0160
23
[W8A0]2-5SERVICE PROCEDURE
8. Water Pipe

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

(1) Intake manifold gasket LH
(2) Intake manifold gasket RH
(3) Fuel injector pipe insulator
(4) Fuel injector pipe
(5) O-ring A
(6) O-ring B
(7) Fuel injector
(8) Insulator
(9) Fuel injector cap
(10) Plate
(11) Sealing
(12) Gasket
(13) Engine coolant hose B
(14) Air by-pass hose
(15) Idle air control solenoid valve
(16) Engine coolant hose A
(17) Nipple (AT vehicles)
(18) Plug
(19) PCV valve(20) Purge control solenoid valve
(21) Nipple
(22) BPT
(23) BPT holder bracket
(24) Back pressure hose
(25) EGR vacuum hose A
(26) EGR vacuum pipe
(27) EGR vacuum hose C
(28) EGR valve
(29) Gasket
(30) EGR vacuum hose B
(31) EGR solenoid valve
(32) EGR pipe
(33) Pressure sensor
(34) Pressure sources switching sole-
noid valve
(35) Vacuum hose A
(36) Vacuum hose B
(37) Vacuum hose C(38) Bracket (Except Canada spec.
vehicles)
(39) Bracket (For Canada spec.
vehicles)
(40) Collar
(41) Intake manifold
Tightening torque: N´m (kg-m, ft-lb)
T1:
3.4±0.5 (0.35±0.05, 2.5±0.4)
T2:4.9±0.5 (0.5±0.05, 3.6±0.4)
T3:6.4±0.5 (0.65±0.05, 4.7±0.4)
T4:16±1.5 (1.6±0.15, 11.6±1.1)
T5:19±1.5 (1.9±0.15, 13.7±1.1)
T6:19±2 (1.9±0.2, 13.7±1.4)
T7:23±3 (2.3±0.3, 16.6±2.2)
T8:25±2 (2.5±0.2, 18.1±1.4)
T9:34±2 (3.5±0.2, 25.3±1.4)
7
[C1C0]2-7COMPONENT PARTS
1. Intake Manifold

5) Disconnect connectors from idle air control
solenoid valve (A) and intake manifold pressure
sensor (B).
B2M2296A
(A) Idle air control solenoid valve
(B) Intake manifold pressure sensor
6) Disconnect connector from throttle position
sensor.
B2M2297
7) Disconnect air by-pass hose from idle air con-
trol solenoid valve.
B2M2298
8) Disconnect engine coolant hoses from throttle
body.
B2M2299
9) Remove bolts which install throttle body to
intake manifold.
B2M2300
10) Installation is in the reverse order of removal.
CAUTION:
Always use a new gasket.
Tightening torque:
Throttle body:
22
±2 N´m (2.2±0.2 kg-m, 15.9±1.4 ft-lb)
Air cleaner case:
4.9
±0.5 N´m (0.5±0.05 kg-m, 3.6±0.4 ft-lb)
2. 2200 cc EXCEPT CALIFORNIA SPEC.
VEHICLES
1) Disconnect battery ground cable.
B2M1723
22
2-7[W3A2]SERVICE PROCEDURE
3. Throttle Body

2) Loosen clamps which connect air intake duct to
air intake chamber and mass air flow sensor.
B2M2019
3) Loosen clamp which connects air intake cham-
ber to throttle body.
B2M2769
4) Disconnect blow-by hose and air hoses, and
remove air intake chamber.
B2M2301
5) Disconnect accelerator cable (A).
6) Disconnect cruise control cable (B). (With
cruise control model)
B2M2302A
7) Disconnect connector from throttle position
sensor.
B2M2303
8) Disconnect connector from idle air control sole-
noid valve.
B2M2756
9) Disconnect engine coolant hoses from throttle
body.
B2M2304
10) Remove bolts which install throttle body to
intake manifold.
B2M2305
11) Installation is in the reverse order of removal.
23
[W3A2]2-7SERVICE PROCEDURE
3. Throttle Body

CAUTION:
IAlways use a new gasket.
IBefore installing air cleaner upper cover,
align holes with protruding portions of air
cleaner lower case, then secure upper cover to
lower case.
Tightening torque:
Throttle body:
22
±2 N´m (2.2±0.2 kg-m, 15.9±1.4 ft-lb)
Air intake chamber:
4.9
±0.5 N´m (0.5±0.05 kg-m, 3.6±0.4 ft-lb)
3. 2500 cc MODEL
1) Disconnect battery ground cable.
B2M1723
2) Loosen clamps which connect air intake duct to
air intake chamber and mass air flow sensor.
S2M0080
3) Loosen clamp which connects air intake cham-
ber to throttle body.
S2M0096
4) Disconnect blow-by hose and air hoses, and
remove air intake chamber and air intake duct as
a unit.
S6M0007
5) Disconnect accelerator cable (A).
6) Disconnect cruise control cable (B). (With
cruise control model)
B2M1190A
7) Disconnect connector from throttle position
sensor.
S2M0083
8) Disconnect engine coolant hoses from throttle
body.
B2M1248
24
2-7[W3A3]SERVICE PROCEDURE
3. Throttle Body