1997 SUBARU LEGACY drain bolt

TROUBLE
Engine will not start.
Rough idle and engine stall
Low output, hesitation and poor acceleration
Surging
Engine does not return to idle.
Dieseling (Run-on)
After burning in exhaust system
Knocking
Excessive engine oil consumption
Excessive fuel consumption Starter does not turn.
Initial combustion does not occur.
Initial combustion occurs.
Engine stalls after initial combustion.
LUBRICATION SYSTEM
22 3 3Incorrect oil pressure
2Loosened oil pump attaching bolts and defective
gasket
2Defective oil filter seal
2Defective crankshaft oil seal
32Defective rocker cover gasket
2Loosened oil drain plug or defective gasket
2Loosened oil pan fitting bolts or defective oil pan
COOLING SYSTEM
33221Overheating
333Over cooling
OTHERS
113 3Malfunction of Evaporative Emission Control
System
21Stuck or damaged throttle valve
322 2Accelerator cable out of adjustment
77
2-3DIAGNOSTICS
1. Engine Trouble in General

TROUBLE
Engine will not start.
Rough idle and engine stall
Low output, hesitation and poor acceleration
Surging
Engine does not return to idle.
Dieseling (Run-on)
After burning in exhaust system
Knocking
Excessive engine oil consumption
Excessive fuel consumption Starter does not turn.
Initial combustion does not occur.
Initial combustion occurs.
Engine stalls after initial combustion.
LUBRICATION SYSTEM
22 3 3Incorrect oil pressure
2Loosened oil pump attaching bolts and defective
gasket
2Defective oil filter seal
2Defective crankshaft oil seal
32Defective rocker cover gasket
2Loosened oil drain plug or defective gasket
2Loosened oil pan fitting bolts or defective oil pan
COOLING SYSTEM
33221Overheating
333Over cooling
OTHERS
113 3Malfunction of Evaporative Emission Control
System
21Stuck or damaged throttle valve
322 2Accelerator cable out of adjustment
79
2-3bDIAGNOSTICS
1. Engine Trouble in General

G2M0066
9) Drain engine oil.
Set container under the vehicle, and remove drain plug
from oil pan.
B2M0312
10) Disconnect connector from rear oxygen sensor.
(Except California 2200 cc model)
B2M0054
11) Remove front exhaust pipe.
(1) Separate front catalytic converter from center
exhaust pipe.
(2) Remove front exhaust pipe from engine.
(3) Remove bolt which installs front exhaust pipe on
bracket.
B2M0743A
12) Remove nuts which install front cushion rubber onto
front crossmember.
G2M0081
13) Remove bolts which install oil pan on cylinder block
while raising up engine.
14) Insert oil pan cutter blade between cylinder block-to-oil
pan clearance.
CAUTION:
Do not use a screwdriver or similar tool in place of oil
pan cutter.
10
2-4SERVICE PROCEDURE
2. Oil Pan and Oil Strainer

G2M0376
2) Install oil strainer onto baffle plate.
CAUTION:
Replace O-ring with a new one.
Tightening torque:
9.8 N⋅m (1.0 kg-m, 7 ft-lb)
G2M0082
3) Hold oil strainer to oil strainer stay.
Tightening torque:
9.8 N⋅m (1.0 kg-m, 7 ft-lb)
G2M0084
4) Apply fluid packing to mating surfaces and install oil
pan.
Fluid packing:
THREE BOND 1207C or equivalent
G2M0081
5) Tighten bolts which install oil pan onto engine block.
Tightening torque:
9.8 N⋅m (1.0 kg-m, 7 ft-lb)
6) Tighten drain plug.
Tightening torque:
44
+4.8
0N⋅m (4.5+0.5
0kg-m, 33+3.6
0ft-lb)
CAUTION:
Replace drain plug gasket with new one.
B2M0743A
7) Lower engine onto front crossmember.
8) Tighten nuts which install front cushion rubber onto front
crossmember.
Tightening torque:
69±15 N⋅m (7.0±1.5 kg-m, 51±11 ft-lb)
12
2-4SERVICE PROCEDURE
2. Oil Pan and Oil Strainer

G2M0213
C: INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
Replace gasket with a new one.
When installing engine coolant pump, tighten bolts
in two stages in numerical sequence as shown in fig-
ure.
Tightening torque:
10
+4
0N⋅m (1.0+0.4
0kg-m, 7.2+2.9
0ft-lb)
G2M0214
3. Thermostat
A: REMOVAL AND INSTALLATION
1) Drain engine coolant.
Set container under the vehicle, and remove drain cock
from radiator.
2) Disconnect radiator outlet hose from thermostat cover.
3) Remove thermostat cover and gasket, and pull out the
thermostat.
G2M0227
4) Install the thermostat in the intake manifold, and install
the thermostat cover together with a gasket.
CAUTION:
When reinstalling the thermostat, use a new gasket.
The thermostat must be installed with the jiggle pin
upward.
In this time, set the jiggle pin of thermostat for front
side.
G2M0215
B: INSPECTION
Replace the thermostat if the valve does not close com-
pletely at an ambient temperature or if the following test
shows unsatisfactory results.
Immerse the thermostat and a thermometer in water. Raise
water temperature gradually, and measure the temperature
and valve lift when the valve begins to open and when the
valve is fully opened. During the test, agitate the water for
even temperature distribution. The measurement should
be to the specification.
Starts to open:
76.0—80.0°C (169—176°F)
Fully opens:
91°C (196°F)
12
2-5SERVICE PROCEDURE
2. Engine Coolant Pump - 3. Thermostat

G2M0213
C: INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
Replace gasket with a new one.
When installing engine coolant pump, tighten bolts
in two stages in numerical sequence as shown in fig-
ure.
Tightening torque:
10
+4
0N⋅m (1.0+0.4
0kg-m, 7.2+2.9
0ft-lb)
G2M0214
3. Thermostat
A: REMOVAL AND INSTALLATION
1) Drain engine coolant.
Set container under the vehicle, and remove drain cock
from radiator.
2) Disconnect radiator outlet hose from thermostat cover.
3) Remove thermostat cover and gasket, and pull out the
thermostat.
G2M0227
4) Install the thermostat in the intake manifold, and install
the thermostat cover together with a gasket.
CAUTION:
When reinstalling the thermostat, use a new gasket.
The thermostat must be installed with the jiggle pin
upward.
In this time, set the jiggle pin of thermostat for front
side.
G2M0215
B: INSPECTION
Replace the thermostat if the valve does not close com-
pletely at an ambient temperature or if the following test
shows unsatisfactory results.
Immerse the thermostat and a thermometer in water. Raise
water temperature gradually, and measure the temperature
and valve lift when the valve begins to open and when the
valve is fully opened. During the test, agitate the water for
even temperature distribution. The measurement should
be to the specification.
Starts to open:
76.0—80.0°C (169—176°F)
Fully opens:
91°C (196°F)
12
2-5SERVICE PROCEDURE
2. Engine Coolant Pump - 3. Thermostat

G2M0345
3. Fuel Tank
A: REMOVAL
1) Release fuel pressure.
2) Drain fuel from fuel tank.
G2M0382
3) Remove rear exhaust pipe.
(1) Lift-up the vehicle.
(2) Separate rear exhaust pipe from center exhaust
pipe.
(3) Separate rear exhaust pipe from muffler.
(4) 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)

G2M0384
4) Remove muffler assembly.
NOTE:
To facilitate the removal of parts, apply a coat of SUBARU
CRC5-56 (Part No. 004301003)

G3M0059
5) Remove rear differential assembly. (AWD model)
(1) Remove rear axle shafts from rear differential
assembly.
(2) Remove rear differential front cover.
(3) Remove propeller shaft.
(4) Remove lower differential bracket.
(5) Set transmission jack under rear differential.
(6) Remove bolts which install rear differential onto
rear crossmember.

13
2-8SERVICE PROCEDURE
3. Fuel Tank

2. Engine
A: REMOVAL
1. Set the vehicle on lift arms.
2. Open front hood and support with a stay.
3. Release fuel pressure.
4. Disconnect battery cable and remove battery from vehicle.
5. Drain coolant.
6. Remove cooling system.
With A/C
7. Collect refrigerant, and remove pressure hoses.
8. Remove air intake system.
9. Remove canister and bracket.
10. Disconnect connectors, cables and hoses.
11. Remove power steering pump from bracket.
12. Remove front exhaust pipe and center exhaust pipe.
13. Remove nuts which hold lower side of transmission to
engine.
14. Remove nuts which install front cushion rubber onto front
crossmember.
AT model
15. Separate torque converter from drive plate.
16. Remove pitching stopper.
17. Disconnect fuel delivery hose, return hose and evaporation
hoses.
18. Support engine with a lifting device and wire ropes.
19. Support transmission with a garage jack.
20. Remove bolts which hold upper side of transmission to
engine.
21. Remove engine from vehicle.















8
2-11SERVICE PROCEDURE
2. Engine