SUBARU LEGACY 1995 Service Repair Manual

1. Lubrication System
A: SPECIFICATIONS
Lubrication methodForced lubrication
Oil pumpPump typeTrochoid type
Number of teethInner rotor 9
Outer rotor 10
Outer rotor diameter x thickness 78x9mm(3.07 x 0.35 in)
Tip clearance between inner and outer rotorSTANDARD 0.04 — 0.14 mm (0.0016 — 0.0055 in)
LIMIT 0.18 mm (0.0071 in)
Side clearance between inner rotor and pump
caseSTANDARD 0.02 — 0.07 mm (0.0008 — 0.0028 in)
LIMIT 0.15 mm (0.0059 in)
Case clearance between outer rotor and pump
caseSTANDARD 0.10 — 0.175 mm (0.0039 — 0.0069 in)
LIMIT 0.20 mm (0.0079 in)
Capacity at
80°C (176°F)700 rpm Discharge- pressure 98 kPa (1.0 kg/cm
2, 14 psi) or more
- quantity 4.2
(4.4 US qt, 3.7 Imp qt)/min.
5,000 rpm Discharge- pressure 294 kPa (3.0 kg/cm
2, 43 psi) or more
- quantity 42.0
(11.10 US gal, 9.24 Imp gal)/min.
Relief valve operation pressure 490 kPa (5.0 kg/cm
2, 71 psi)
Oil filterTypeFull-flow filter type
Filtration area 1,000 cm
2(155 sq in)
By-pass valve opening pressure 157 kPa (1.6 kg/cm
2, 23 psi)
Outer diameter x width 80 x 70 mm (3.15 x 2.76 in)
Oil filter to engine thread size M 20 x 1.5
Relief valve (on rocker shaft) operation pressure 69 kPa (0.7kg/cm
2, 10 psi)
Oil pressure
switchTypeImmersed contact point type
Working voltage — wattage 12 V — 3.4 W or less
Warning light activation pressure 14.7 kPa (0.15 kg/cm
2, 2.1 psi)
Proof pressure More than 981 kPa (10 kg/cm
2, 142 psi)
Oil pan capacity4.0
(4.2 US qt, 3.5 Imp qt)
2
2-4SPECIFICATIONS AND SERVICE DATA
1. Lubrication System

1. Lubrication System
B2M0314A

1Plug


2Washer


3Relief valve spring


4Relief valve


5Oil seal


6Oil pump case


7Inner rotor


8Outer rotor


9Oil pump cover


10Oil filter


11O-ring


12Oil pump ASSY


13Oil pressure switch


14Oil filler duct

15Baffle plate


16Oil strainer stay


17O-ring


18Oil strainer


19Oil level gauge guide


20Oil pan


21Oil level gauge


22Washer


23Drain plug
Tightening torque: N⋅m (kg-m, ft-lb)
T1: 5 (0.5, 3.6)
T2: 5
+1
0(0.5+0.1
0, 3.6+0.7
0)
T3: 6.4 (0.65, 4.7)
T4: 9.8 (1.0, 7.0)
T5: 44.1±3.4 (4.5±0.35, 32.5±2.5)
3
2-4COMPONENT PARTS
1. Lubrication System

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.
4
2-4SERVICE PROCEDURE
1. Oil Pump

G2M0071
7) Remove oil pump by using flat-bladed screwdriver.
CAUTION:
Be careful not to scratch mating surfaces of cylinder
block and oil pump.
B2M0315A
B: DISASSEMBLY
Remove screws which secure oil pump cover and disas-
semble oil pump.
Inscribe alignment marks on inner and outer rotors so that
they can be replaced in their original positions during reas-
sembly.
CAUTION:
Before removing relief valve, loosen plug when remov-
ing oil pump from cylinder block.


1Oil seal


2Pump case


3Inner rotor


4Outer rotor


5Pump cover


6Relief valve


7Relief spring


8Plug


9Washer


10O-ring
B2M0316A
C: INSPECTION
1. TIP CLEARANCE
Measure the tip clearance of rotors. If the clearance
exceeds the limit, replace rotors as a matched set.
Tip clearance:
Standard
0.04—0.14 mm (0.0016—0.0055 in)
Limit
0.18 mm (0.0071 in)
B2M0317A
2. CASE CLEARANCE
Measure the clearance between the outer rotor and the
cylinder block rotor housing. If the clearance exceeds the
limit, replace the rotor.
Case clearance:
Standard
0.10—0.175 mm (0.0039—0.0069 in)
Limit
0.20 mm (0.0079 in)
5
2-4SERVICE PROCEDURE
1. Oil Pump

B2M0318
3. SIDE CLEARANCE
Measure clearance between oil pump inner rotor and pump
cover. If the clearance exceeds the limit, replace rotor or
pump body.
Side clearance:
Standard
0.02—0.07 mm (0.0008—0.0028 in)
Limit
0.15 mm (0.0059 in)
4. OIL RELIEF VALVE
Check the valve for fitting condition and damage, and the
relief valve spring for damage and deterioration. Replace
the parts if defective.
Relief valve spring:
Free length; 71.8 mm (2.827 in)
Installed length; 54.7 mm (2.154 in)
Load when installed; 77.08 N (7.86 kg, 17.33 lb)
5. OIL PUMP CASE
Check the oil pump case for worn shaft hole, clogged oil
passage, worn rotor chamber, cracks, and other faults.
6. OIL SEAL
Check the oil seal lips for deformation, hardening, wear,
etc. and replace if defective.
G2M0076
D: ASSEMBLY
1) Install front oil seal by using ST.
ST 499587100 OIL SEAL INSTALLER
CAUTION:
Use a new oil seal.
6
2-4SERVICE PROCEDURE
1. Oil Pump

B2M0315B
2) Install inner and outer rotors in their original positions.
3) Install oil relief valve and relief spring.
4) Install oil pump cover.
Tightening torque:
T1: 5
+1
0N⋅m (0.5+0.1
0kg-m, 3.6+0.7
0ft-lb)
T2: 44.1±3.4 N⋅m (4.5±0.35 kg-m, 32.5±2.5 ft-lb)
B2M0319A
E: INSTALLATION
Installation is in the reverse order of removal.
Do the following:
1) Apply fluid packing to matching surfaces of oil pump.
Fluid packing:
THREE BOND 1215 or equivalent
2) Replace O-ring with a new one.
3) Be careful not to scratch oil seal when installing oil
pump on cylinder block.
CAUTION:
Apply fluid packing to oil pressure switch threads
before installation.
Fluid packing:
THREE BOND 1215 or equivalent
7
2-4SERVICE PROCEDURE
1. Oil Pump

G2M0544
2. Oil Pan and Oil Strainer
A: REMOVAL
1) Remove front wheels.
2) Remove air intake duct.
3) Disconnect connector from front oxygen sensor.
G2M0295
4) Remove pitching stopper.
B2M0320
5) Remove radiator upper brackets.
B2M0053
6) Support engine with a lifting device and wire ropes.
7) Lift-up the vehicle.
CAUTION:
At this time, raise up wire ropes.
G2M0066
8) Drain engine oil.
Set container under the vehicle, and remove drain plug
from oil pan.
8
2-4SERVICE PROCEDURE
2. Oil Pan and Oil Strainer

B2M0312
9) Disconnect connector from rear oxygen sensor.
B2M0054
10) 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.
G2M0293
11) Remove nuts which install front cushion rubber onto
front crossmember.
G2M0081
12) Remove bolts which install oil pan on cylinder block
while raising up engine.
13) 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.
G2M0082
14) Separate oil strainer from oil strainer stay.
9
2-4SERVICE PROCEDURE
2. Oil Pan and Oil Strainer

G2M0376
15) Remove oil strainer.
G2M0377
16) Remove baffle plate and oil strainer stay.
B: INSPECTION
By visual check make sure oil pan, oil strainer, oil strainer
stay and baffle plate are not damaged.
G2M0377
C: INSTALLATION
CAUTION:
Before installing oil pan, clean sealant from oil and
engine block.
1) Install baffle plate and oil strainer stay.
Tightening torque:
5N⋅m (0.5 kg-m, 3.6 ft-lb)
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)
10
2-4SERVICE PROCEDURE
2. Oil Pan and Oil Strainer

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)
G2M0293
6) Lower engine onto front crossmember.
7) 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)
B2M0054
8) Install front exhaust pipe.
CAUTION:
Always use the new gaskets.
(1) Place front exhaust pipe on bracket.
(2) Tighten nuts which install front exhaust pipe on
engine.
Tightening torque:
30±5 N⋅m (3.1±0.5 kg-m, 22.4±3.6 ft-lb)
11
2-4SERVICE PROCEDURE
2. Oil Pan and Oil Strainer