Subaru Legacy (2005 year). Service manual — part 305

LU(H4DOTC)-19

LUBRICATION

Engine Oil Cooler

8. Engine Oil Cooler

A: REMOVAL

1) Lift-up the vehicle.
2) Remove the under cover.
3) Drain engine oil.
4) Drain coolant.
5) Remove the water by-pass pipe between oil
cooler and water pump.

6) Remove the engine oil filter. <Ref. to
LU(H4DOTC)-18, REMOVAL, Engine Oil Filter.>
7) Remove the oil cooler connector and remove oil
cooler.

B: INSTALLATION

Install in the reverse order of removal.

NOTE:
Use new O-rings.

Tightening torque:

T: 54 N

⋅

m (5.5 kgf-m, 40 ft-lb)

C: INSPECTION

1) Check that coolant passages are not clogged by
blowing compressed air.
2) Check the mating surfaces of cylinder block, O-
ring groove and oil filter for damage.

(A) O-ring

(B) Oil cooler

(C) Oil cooler connector

LU-00040

LU-00225

(C)

(B)

(A)

(A) O-ring

(B) Oil cooler

(C) Oil cooler connector

LU-00226

(C)

(B)

(A)

T

LU(H4DOTC)-20

LUBRICATION

Engine Lubrication System Trouble in General

9. Engine Lubrication System Trouble in General

A: INSPECTION

Before performing diagnosis, make sure that the engine oil level is correct and no oil leakage exists.

Symptom

Possible cause

Corrective action

1. Warning light remains
on.

1) Oil pressure switch
failure

Cracked diaphragm or oil leakage within switch

Replace.

Broken spring or seized contacts

Replace.

2) Low oil pressure

Clogging of oil filter

Replace.

Malfunction of oil by-pass valve in oil filter

Clean or replace.

Malfunction of oil relief valve in oil pump

Clean or replace.

Clogged oil passage

Clean.

Excessive tip clearance and side clearance of oil
pump rotor and gear

Replace.

Clogged oil strainer or broken pipe

Clean or replace.

3) No oil pressure

Insufficient engine oil

Replenish.

Broken pipe of oil strainer

Replace.

Stuck oil pump rotor

Replace.

2. Warning light does
not turn on.

1) Malfunction of combination meter

Replace.

2) Poor contact of switch contact points

Replace.

3) Disconnection of wiring

Repair.

3. Warning light flickers
momentarily.

1) Poor contact at terminals

Repair.

2) Defective wiring harness

Repair.

3) Low oil pressure

Check for the same
possible causes as
listed in 1) —2).

SPEED CONTROL SYSTEMS

SP(H4DOTC)

Page

1.

General Description . . . . . . . . . . . . . . . . . . . . . 2

SP(H4DOTC)-2

Vehicle-id:
SIE-id:S147001a22:A:SPECIFICATION
∼

SPEED CONTROL SYSTEMS

General Description

1. General Description

A: SPECIFICATION

Specifications for Turbo model is included in
SP(H4SO 2.0) section. <Ref. to SP(H4SO 2.0)-2,
General Description.>