Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Subaru Legacy 1995-1999 Approved Subaru Legacy 1996 1996 Service Manual ENGINE SECTION ENGINE LUBRICATION SYSTEM MSA5TCD96L5990
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SERVICE PROCEDURE 2-4
1. Oil Pump
1. Oil Pump
A: REMOVAL
1) Drain engine oil.
Set container under the vehicle, and remove drain plug
from oil pan.
G2M0066
2) Drain coolant.
Set container under the vehicle, and remove drain cock
from radiator.
B2M0051A
3) Remove belt covers, timing belt and related parts.
B2M0302
4) Remove belt tensioner bracket.
B2M0303
5) Remove left cam sprocket and left belt cover No. 2.
6) Remove water pump.
G2M0210
5
2-4 SERVICE PROCEDURE
1. Oil Pump
7) Remove oil pump by using flat-bladed screwdriver.
CAUTION:
Be careful not to scratch mating surfaces of cylinder
block and oil pump.
G2M0071
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.
k Oil seal
1
k Pump case
2
k Inner rotor
3
k Outer rotor
4
k Pump cover
5
k Relief valve
6
k Relief spring
7
k Plug
8
k Washer
9
k O-ring
10
B2M0315A
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)
B2M0316A
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)
B2M0317A
6
SERVICE PROCEDURE 2-4
1. Oil Pump
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)
B2M0318
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.
D: ASSEMBLY
1) Install front oil seal by using ST.
ST 499587100 OIL SEAL INSTALLER
CAUTION:
Use a new oil seal.
G2M0076
7
2-4 SERVICE PROCEDURE
1. Oil Pump
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 Nm (0.5+0.1 kg-m, 3.6-0 ft-lb)
-0 -0
+0.7
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