radiator SUBARU LEGACY 1997 Service Repair Manual

3. Engine Idle Speed
A: MEASUREMENT
1) Before checking idle speed, check the following:
(1) Ensure that air cleaner element is free from
clogging, ignition timing is correct, spark plugs are in
good condition, and that hoses are connected properly.
(2) Ensure that malfunction indicator light (CHECK
ENGINE light) does not illuminate.
2) Warm-up the engine.
G2M0096
3) Connect Subaru Select Monitor or the OBD-II general
scan tool to data link connector.
CAUTION:
When connecting Subaru Select Monitor, turn ignition
switch to OFF.
4) Start the engine and measure engine speed.
NOTE:
Engine speed is indicated on Subaru Select Monitor by
selecting “MODE F04”.
G2M0097
NOTE:

When using the OBD-II general scan tool, carefully read
its operation manual.

When Subaru Select Monitor is not used, attach the
pickup sensor on tachometer (Secondary pickup type) to
#1 cylinder spark plug cord.

This ignition system provides simultaneous ignition for
#1 and #2 plugs. It must be noted that some tachometers
may register twice that of actual engine speed.
5) Check idle speed when unloaded. (With headlights,
heater fan, rear defroster, radiator fan, air conditioning, etc.
OFF)
Idle speed (No load and gears in neutral (MT) or N or
P (AT) position):
700±100 rpm
6) Check idle speed when loaded. (Turn air conditioning
switch to “ON” and operate compressor for at least one
minute before measurement.)
Idle speed [A/C“ON”, no load and gears in neutral
(MT) or N or P (AT) position]:
850±50 rpm
CAUTION:
Never rotate idle adjusting screw. If idle speed is out
of specifications, refer to General On-board Diagnosis
Table under “2-7 On-Board Diagnostics II System”.
3
2-2
3. Engine Idle Speed

G2M0066
1. Oil Pump
A: REMOVAL
1) Drain engine oil.
Set container under the vehicle, and remove drain plug
from oil pan.
B2M0051A
2) Drain coolant.
Set container under the vehicle, and remove drain cock
from radiator.
B2M0302
3) Remove belt covers, timing belt and related parts.

B2M0303
4) Remove belt tensioner bracket.
G2M0210
5) Remove left cam sprocket and left belt cover No. 2.
6) Remove water pump.
5
2-4SERVICE PROCEDURE
1. Oil Pump

B2M0724
2. Oil Pan and Oil Strainer
A: REMOVAL
1) Remove front wheels.
2) Remove air intake duct.
3) Disconnect connector from front oxygen sensor.
B2M0725
4) Disconnect connector from rear oxygen sensor. (Cali-
fornia 2200 cc model only)
G2M0295
5) Remove pitching stopper.
B2M0320
6) Remove radiator upper brackets.
B2M0053
7) Support engine with a lifting device and wire ropes.
8) Lift-up the vehicle.
CAUTION:
At this time, raise up wire ropes.
9
2-4SERVICE PROCEDURE
2. Oil Pan and Oil Strainer

B2M0724
13) Connect connector to front oxygen sensor.
B2M0725
14) Connect connector to rear oxygen sensor. (California
2200 cc model only)
G2M0302
15) Install pitching stopper.
Tightening torque:
T1: 49±5 N⋅m (5.0±0.5 kg-m, 36.2±3.6 ft-lb)
T2: 57±10 N⋅m (5.8±1.0 kg-m, 42±7 ft-lb)
B2M0320
16) Install radiator upper brackets.
Tightening torque:
12±3 N⋅m (1.2±0.3 kg-m, 8.7±2.2 ft-lb)
B2M0321
17) Install air intake duct.
18) Fill engine oil through filler pipe up to upper point of
level gauge.
Engine oil capacity:
2200 cc ; Upper level
4.0
(4.2 US qt, 3.5 Imp qt)
Lower level
3.0
(3.2 US qt, 2.6 Imp qt)
2500 cc ; Upper level
4.5
(4.8 US qt, 4.0 Imp qt)
14
2-4SERVICE PROCEDURE
2. Oil Pan and Oil Strainer

1. Engine Cooling System
A: SPECIFICATIONS
1. 2200 cc MODEL
Cooling systemElectric fan + Forced engine coolant circulation
system
Total engine coolant capacity
(US qt, Imp qt) Approx. 6.1 (6.4, 5.4)
Engine
coolant
pumpTypeCentrifugal impeller type
Discharge performance IDischarge 20
(5.3 US gal, 4.4 Imp gal)/min.
Pump speed—total engine cool-
ant head760 rpm — 0.3 mAq (1.0 ftAq)
Engine coolant temperature 85°C (185°F)
Discharge performance IIDischarge 100
(26.4 US gal, 22.0 Imp gal)/min.
Pump speed—total engine cool-
ant head3,000 rpm — 5.0 mAq (16.4 ftAq)
Engine coolant temperature 85°C (185°F)
Discharge performance IIIDischarge 200
(52.8 US gal, 44.0 Imp gal)/min.
Pump speed—total engine cool-
ant head6,000 rpm — 23.0 mAq (75.5 ftAq)
Engine coolant temperature 85°C (185°F)
Impeller diameter 76 mm (2.99 in)
Number of impeller vanes 8
Pump pulley diameter 60 mm (2.36 in)
ThermostatTypeWax pellet type
Starts to open 76 — 80°C (169 — 176°F)
Fully opened91°C (196°F)
Valve lift9.0 mm (0.354 in) or more
Valve bore35 mm (1.38 in)
Radiator fanMotor120 W
Fan diameter x Blade 320 mm (12.60 in) x 5
RadiatorTypeCross flow, pressure type
Core dimensions670x361x16mm
(26.38 x 14.21 x 0.63 in)
Pressure range in which cap valve is openAbove: 88±10 kPa
(0.9±0.1 kg/cm
2, 12.8±1.4 psi)
Below: 4.9 to 9.8 kPa
(0.05 to 0.1 kg/cm
2, 0.7 to 1.4 psi)
FinsCorrugated fin type
Reservoir
tankCapacity 0.5
(0.5 US qt, 0.4 Imp qt)
2
2-5SPECIFICATIONS AND SERVICE DATA
1. Engine Cooling System

2. 2500 cc MODEL
Cooling systemElectric fan + Forced engine coolant circulation
system
Total engine coolant capacity
(US qt, Imp qt) Approx. 6.1 (6.4, 5.4)
Engine
coolant
pumpTypeCentrifugal impeller type
Discharge performance IDischarge 20
(5.3 US gal, 4.4 Imp gal)/min.
Pump speed—total engine cool-
ant head760 rpm—0.3 mAq (1.0 ftAq)
Engine coolant temperature 85°C (185°F)
Discharge performance IIDischarge 100
(26.4 US gal, 22.0 Imp gal)/min.
Pump speed—total engine cool-
ant head3,000 rpm—5.0 mAq (16.4 ftAq)
Engine coolant temperature 85°C (185°F)
Discharge performance IIIDischarge 200
(52.8 US gal, 44.0 Imp gal)/min.
Pump speed—total engine cool-
ant head6,000 rpm—23.0 mAq (75.5 ftAq)
Engine coolant temperature 85°C (185°F)
Impeller diameter 76 mm (2.99 in)
Number of impeller vanes 8
Pump pulley diameter 60 mm (2.36 in)
ThermostatTypeWax pellet type
Starts to open 76—80°C (169—176°F)
Fully opened91°C (196°F)
Valve lift9.0 mm (0.354 in) or more
Valve bore35 mm (1.38 in)
Radiator fanMotor120 W (main fan)
140 W (sub fan)
Fan diameter x Blade340 mm (13.39 in) x 5 (main fan)
280 mm (11.02 in) x 4 (sub fan)
RadiatorTypeCross flow, pressure type
Core dimensions670x361x25mm
(26.38 x 14.21 x 0.98 in)
Pressure range in which cap valve is openAbove: 88±10 kPa
(0.9±0.1 kg/cm
2, 12.8±1.4 psi)
Below:4.9 to9.8 kPa
(0.05 to0.1 kg/cm
2,0.7 to1.4 psi)
FinsCorrugated fin type
Reservoir
tankCapacity 0.5
(0.5 US qt, 0.4 Imp qt)
B: SERVICE DATA
Engine
coolant
pumpClearance between impeller and caseStandard
Limit0.5—0.7 mm (0.020—0.028 in)
1.0 mm (0.039 in)
“Thrust”runout of impeller end 0.5 mm (0.020 in)
3
2-5SPECIFICATIONS AND SERVICE DATA
1. Engine Cooling System

2. Radiator and Radiator Fan
B2M0300A

1Radiator lower cushion


2Radiator


3O-ring


4Air vent plug


5Radiator upper cushion


6Radiator upper bracket


7Clamp


8Radiator inlet hose


9Engine coolant reservoir tank cap


10Over flow hose


11Engine coolant reservoir tank


12Shroud


13Radiator main fan motor ASSY


14Radiator outlet hose

15Radiator drain pipe


16Gasket


17Radiator drain plug


18ATF hose clamp


19ATF inlet hose A


20ATF outlet hose A


21ATF pipe


22ATF outlet hose B


23ATF inlet hose B
Tightening torque: N⋅m (kg-m, ft-lb)
T1: 6.9±1.5 (0.7±0.15, 5.1±1.1)
T2: 12±3 (1.2±0.3, 8.7±2.2)
5
2-5COMPONENT PARTS
2. Radiator and Radiator Fan

1. On-Car Service
A: DRAINING OF ENGINE COOLANT
1) Lift-up the vehicle.
B2M0133A
2) Fit vinyl tube to drain pipe.
B2M0015A
3) Loosen drain cock to drain engine coolant into con-
tainer.
NOTE:
Remove radiator cap so that engine coolant will drain
faster.
B2M0301
B: FILLING OF ENGINE COOLANT
1) Remove air vent plug from radiator.
B2M0135
2) Fill engine coolant into radiator up to filler neck position.
7
2-5SERVICE PROCEDURE
1. On-Car Service

B2M0140
3) Fill engine coolant into reservoir tank up to upper level.
4) Attach radiator cap and reservoir tank cap properly.
5) Install air vent plug.
6) Warm-up engine completely for more than five minutes
at 2,000 to 3,000 rpm.
7) Stop engine and wait until temperature drops to a safe
level.
8) If engine coolant level drops in radiator, add engine
coolant to filler neck position.
9) If engine coolant level drops from upper level of reser-
voir tank, add engine coolant to upper level.
10) Attach radiator cap and reservoir tank cap properly.
B2M0136
C: CHECKING OF COOLING SYSTEM
1) Remove radiator cap, top off radiator, and attach tester
to radiator in place of cap.
2) Apply a pressure of 157 kPa (1.6 kg/cm
2, 23 psi) to
radiator to check if:
(1) Engine coolant leaks at/around radiator.
(2) Engine coolant leaks at/around hoses or connec-
tions.
CAUTION:
Engine should be off.
Wipe engine coolant from check points in advance.
Be careful to prevent engine coolant from spurting
out when removing tester.
Be careful also not to deform filler neck of radiator
when installing or removing tester.
8
2-5SERVICE PROCEDURE
1. On-Car Service

G6M0095
2. Engine Coolant Pump
A: REMOVAL
1) Open engine hood.
2) Disconnect ground cable from the battery.
B2M0015A
3) Drain engine coolant completely.

B2M0137
4) Disconnect radiator outlet hose from engine coolant
pump.
B2M0323
5) Remove radiator fan motor assembly.

G2M0286
6) Remove V-belt(s).

9
2-5SERVICE PROCEDURE
2. Engine Coolant Pump