1999 SUBARU LEGACY heat

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) Heat sealed cover
(2) Fuel tank band
(3) Protector LH
(4) Protector RH
(5) Fuel tank
(6) Canister hose A
(7) Clamp
(8) Fuel pump gasket
(9) Main fuel meter unit
(10) Fuel pump ASSY
(11) Fuel cut valve gasket
(12) Fuel cut valve
(13) Evaporation hose A
(14) Clip
(15) Joint pipe(16) Evaporation hose C
(17) Evaporation hose B
(18) Evaporation hose D
(19) Evaporation hose E
(20) Evaporation pipe ASSY
(21) Canister hose B
(22) Jet pump hose A
(23) Fuel delivery hose A
(24) Fuel return hose A
(25) Clamp
(26) Jet pump hose B
(27) Fuel pipe ASSY
(28) Fuel delivery hose B
(29) Fuel return hose B
(30) Evaporation hose F(31) Fuel sub meter gasket
(32) Jet pump filter
(33) Fuel sub meter unit
(34) Protector cover
(35) Vent valve hose
(36) Vent valve
(37) Fuel tank pressure sensor
(38) Fuel tank pressure sensor hose
(39) Vent valve gasket
Tightening torque: N´m (kg-m, ft-lb)
T1:
4.4±1.5 (0.45±0.15, 3.3±1.1)
T2:7.4±2.0 (0.75±0.2, 5.4±1.4)
T3:33±10 (3.4±1.0, 25±7)
4
2-8[C100]COMPONENT PARTS
1. Fuel Tank

6) Move rear seat cushion forward. (Wagon
model)
B2M1737
7) Disconnect connector of fuel tank cord from
rear harness.
B2M1738
8) Push grommet which holds fuel tank cord on
floor panel into under the body.
B2M1739A
9) Lift-up the vehicle.
10) Remove rear exhaust pipe.
(1) Separate rear exhaust pipe from center
exhaust pipe.
(2) Separate rear exhaust pipe from muffler.
(3) Remove bracket from rubber cushion, and
remove exhaust pipe.
NOTE:
To facilitate the removal of parts, apply a coat of
SUBARU CRC5-56 (Part No. 004301003). 2-9 [W3A0].>
Separate rear exhaust pipe from muffler.
S2M0158
11) Remove heat sealed cover.
S2M0166
12) Remove muffler assembly.

NOTE:
To facilitate the removal of parts, apply a coat of
SUBARU CRC5-56 (Part No. 004301003).
B2M0063
10
2-8[W2A0]SERVICE PROCEDURE
2. Fuel Tank

10) Connect connector to pressure control sole-
noid valve.
B2M1742
11) Connect hose to joint pipe, and tighten them
with clamp.
B2M2382A
12) Connect evaporation hose to canister, and
tighten them with clamp.
B2M2381A
13) Connect hoses to roll over valve.
S2M0167
14) Install muffler assembly.
B2M0063
15) Install heat sealed cover.
S2M0166
16) Install bolts which hold parking brake holding
bracket.
S2M0191
17) Install rear exhaust pipe. [W3B0].>
S2M0158
14
2-8[W2B0]SERVICE PROCEDURE
2. Fuel Tank

B2M2295AB2M1027A
(3) Disconnect the following hoses.
H2M2433C
(1) Brake booster vacuum hose
(2) Heater inlet and outlet hose
13
[W1B0]2-11SERVICE PROCEDURE
1. Engine

7) Install canister and bracket.
(1) Install power stering pump on bracket, and
tighten bolts.
Tightening torque:
39
±10 N´m (4.0±1.0 kg-m, 29±7 ft-lb)
S2M0086
(2) Install power steering pipe bracket on right
side intake manifold, and install spark plug
codes.
B2M2309
(3) Install front side V-belt, and adjust it.

G2M0286
8) Tighten nuts which hold lower side of transmis-
sion to engine.
Tightening torque:
50
±4 N´m (5.1±0.4 kg-m, 36.9±2.9 ft-lb)
B2M2790
9) Tighten nuts which install front cushion rubber
onto crossmember.
Tightening torque:
69
±15 N´m (7.0±1.5 kg-m, 51±11 ft-lb)
CAUTION:
Be sure to tighten front cushion rubber mount-
ing bolts in the innermost elliptical hole in the
front crossmember.
G2M0303
10) Install front exhaust pipe and center exhaust
pipe.
11) Connect the following hoses.
(1) Fuel delivery hose, return hose and evapo-
ration hose
(2) Heater inlet and outlet hoses
(3) Brake booster vacuum hose
12) Connect the following connectors.
(1) Engine ground terminal
(2) Engine harness connectors
(3) Front oxygen sensor connector
(4) Rear oxygen sensor connector (California
spec. vehicles)
(5) Alternator connector and terminal
(6) A/C compressor connectors (With A/C)
13) Connect the following cables.
(1) Accelerator cable
(2) Cruise control cables (With cruise control)
(3) Clutch cable (2200 cc MT vehicles)
18
2-11[W1C0]SERVICE PROCEDURE
1. Engine

(8) Remove rear exhaust pipe.
CAUTION:
When removing exhaust pipes, be careful each
exhaust pipe does not drop out.
S2M0158
(9) Remove heat shield cover of rear exhaust
pipe.
G2M0830
(10) Remove hanger bracket from right side of
transmission.
B2M0032
16) Drain ATF to remove ATF drain plug. (AT
vehicles)
B3M1036A
17) Disconnect ATF cooler hoses from pipes of
transmission side, and remove ATF level gauge
guide. (AT vehicles)
G2M0317
18) Remove propeller shaft.
(1) Remove front cover of rear differential
mount.
(2) Separate propeller shaft from rear differen-
tial.
G3M0023
24
2-11[W2B0]SERVICE PROCEDURE
2. Transmission

(1) Install heat shield cover.
G2M0830
(2) Install rear exhaust pipe to muffler.
Tightening torque:
48
±9 N´m (4.9±0.9 kg-m, 35.4±6.5 ft-lb)
G2M0382
(3) Install hanger bracket on right side of trans-
mission.
B2M0032
(4) Install front exhaust pipe onto engine.
Tightening torque:
30
±5 N´m (3.1±0.5 kg-m, 22.4±3.6 ft-lb)
G2M0290
(5) Install center exhaust pipe to rear exhaust
pipe.
Tightening torque:
18
±5 N´m (1.8±0.5 kg-m, 13.0±3.6 ft-lb)
G2M0291
(6) Tighten bolt which installs center exhaust
pipe to hanger bracket.
Tightening torque:
30
±5 N´m (3.1±0.5 kg-m, 22.4±3.6 ft-lb)
S2M0206
(7) Connect connector to rear oxygen sensor.
(Except 2500 cc California spec. vehicles)
B2M0335
(8) Install under cover.
30
2-11[W2C0]SERVICE PROCEDURE
2. Transmission