Subaru Legacy III (2000-2003 year). Manual - part 448

LU(H4DOSTC)-12

LUBRICATION

OIL PUMP

C: DISASSEMBLY

Remove screws which secure oil pump cover and
disassemble oil pump. Inscribe alignment marks on
inner and outer rotors so that they can be replaced
in their original positions during reassembly.

D: ASSEMBLY

1) Install front oil seal by using ST.
ST

499587100

OIL SEAL INSTALLER

NOTE:
Use a new oil seal.

2) Apply engine oil to inner and outer rotors.
3) Install inner and outer rotors in their original po-
sitions.
4) Install oil relief valve and relief valve spring.
5) Install oil pump cover.

Tightening torque:

T1: 5 N·m (0.5 kgf-m, 3.6 ft-lb)
T2: 44 N·m (4.5 kgf-m, 33 ft-lb)

E: INSPECTION

1. TIP CLEARANCE

Measure the tip clearance of rotors. If the clearance
exceeds the limit, replace rotors as a set.

Tip clearance:

Standard

0.04 — 0.14 mm (0.0016 — 0.0055 in)

Limit

0.18 mm (0.0071 in)

(A) Oil seal

(B) Pump case

(D) Outer rotor

(E) Pump cover

(F) Relief valve

(G) Relief valve spring

(H) Plug

(I) Gasket

LU-00020

( A )

( B )

( C )

( D )

( E )

( F )

( G )

( H )

( I )

LU-00021

LU-00022

LU-00023

LU(H4DOSTC)-13

LUBRICATION

OIL PUMP

2. CASE CLEARANCE

Measure the clearance between the outer rotor and
the oil pump rotor housing. If the clearance ex-
ceeds 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)

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

0.12 mm (0.0047 in)

4. OIL RELIEF VALVE

Check the valve for fitting condition and damage,
and the relief valve spring for damage and deterio-
ration. Replace the parts if defective.

Relief valve spring:

Free length

73.7 mm (2.902 in)

Installed length

54.7 mm (2.154 in)

Load when installed

93.1 N (9.49 kgf, 20.93 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.

LU-00024

LU-00025

LU(H4DOSTC)-14

LUBRICATION

OIL PAN AND STRAINER

5. Oil Pan and Strainer

A: REMOVAL

1) Set the vehicle on lift arms.
2) Remove front wheels.
3) Disconnect battery ground cable.

4) Disconnect the connector from mass air flow
sensor.

5) Loosen the clamp (A) which connects air intake
boot to intake duct.
6) Remove the two clips (B) from air cleaner upper
cover.
7) Remove the air intake boot and air cleaner upper
cover.

8) Remove the intercooler. <Ref. to IN(H4DOSTC)-
13, REMOVAL, Intercooler.>

9) Remove pitching stopper.

10) Remove radiator upper brackets.

11) Support engine with a lifting device and wire
ropes.

12) Lift-up the vehicle.

CAUTION:
When lifting up the vehicle, wire rope must be
raised at the same time.
13) Remove under cover.

FU-00009

LU-00026

(B)

(A)

LU-00153

ME-00213

LU-00097

LU-00028

LU(H4DOSTC)-15

LUBRICATION

OIL PAN AND STRAINER

14) Drain engine oil.
Set container under the vehicle, and remove drain
plug from oil pan.

15) Remove nuts which secure front cushion rub-
ber onto front crossmember.

16) Remove bolts which secure oil pan on cylinder
block while raising up engine.
17) 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.

18) Remove oil strainer.

19) Remove baffle plate.

B: INSTALLATION

NOTE:
Before installing oil pan, clean sealant from oil pan
and engine block.
1) Install baffle plate.

Tightening torque:

6.4 N·m (0.65 kgf-m, 4.7 ft-lb)

(A) Gasket

(B) Drain plug

LU-00151

(B)

(A)

LU-00030

LU-00031

LU-00032

LU-00033

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