Subaru Legacy (2005 year). Service manual - part 76

ME(H4SO 2.0)-87

MECHANICAL

Connecting Rod

24.Connecting Rod

A: SPECIFICATION

Refer to “Cylinder Block” for removal and installa-
tion procedures of connecting rod.
<Ref. to ME(H4SO 2.0)-64, REMOVAL, Cylinder
Block.> <Ref. to ME(H4SO 2.0)-69, INSTALLA-
TION, Cylinder Block.>

ME(H4SO 2.0)-88

MECHANICAL

Crankshaft

25.Crankshaft 

A: SPECIFICATION

Refer to “Cylinder Block” for removal and installa-
tion procedures of crankshaft. <Ref. to ME(H4SO
2.0)-64, REMOVAL, Cylinder Block.> <Ref. to
ME(H4SO 2.0)-69, INSTALLATION, Cylinder
Block.>

ME(H4SO 2.0)-89

MECHANICAL

Engine Trouble in General

26.Engine Trouble in General

A: INSPECTION

NOTE:
“RANK” shown in the chart refers to the possibility of the cause of trouble in order (“Very often” to “Rarely”)
A — Very often
B — Sometimes
C — Rarely

Symptom

Problem parts, etc.

Possible cause

Rank

1. Engine does not start.

1) Starter does not turn.

Starter

Defective battery-to-starter harness

B

Defective starter switch

C

Defective inhibitor switch

C

Defective starter

B

Battery

Poor terminal connection

A

Run-down battery

A

Defective charging system

B

Friction

Seizure of crankshaft and connecting rod bearing

C

Seized camshaft

C

Seized or stuck piston and cylinder

C

2) Initial combustion does 
not occur.

Starter

Defective starter

C

Engine control system <Ref. to EN(H4SO 2.0)(diag)-2, Basic Diagnostic Procedure.> 
<Ref. to EN(H4SO 2.5)(diag)-2, Basic Diagnostic Procedure.>

A

Fuel line

Defective fuel pump and relay

A

Lack of or insufficient fuel

B

Belt

Trouble

B

Defective timing

B

Compression

Incorrect valve clearance

C

Loosened spark plug or defective gasket

C

Loosened cylinder head bolt or defective gasket

C

Improper valve sealing

C

Defective valve stem

C

Worn or broken valve spring

B

Worn or stuck piston rings, cylinder and piston

C

Incorrect valve timing

B

Improper engine oil (low viscosity)

B

ME(H4SO 2.0)-90

MECHANICAL

Engine Trouble in General

3) Initial combustion occurs.

Engine control system <Ref. to EN(H4SO 2.0)(diag)-2, Basic Diagnostic Procedure.> 
<Ref. to EN(H4SO 2.5)(diag)-2, Basic Diagnostic Procedure.>

A

Intake system

Defective intake manifold gasket

B

Defective throttle body gasket

B

Fuel line

Defective fuel pump and relay

C

Clogged fuel line

C

Lack of or insufficient fuel

B

Belt

Trouble

B

Defective timing

B

Compression

Incorrect valve clearance

C

Loosened spark plug or defective gasket

C

Loosened cylinder head bolt or defective gasket

C

Improper valve sealing

C

Defective valve stem

C

Worn or broken valve spring

B

Worn or stuck piston rings, cylinder and piston

C

Incorrect valve timing

B

Improper engine oil (low viscosity)

B

4) Engine stalls after initial 
combustion.

Engine control system <Ref. to EN(H4SO 2.0)(diag)-2, Basic Diagnostic Procedure.> 
<Ref. to EN(H4SO 2.5)(diag)-2, Basic Diagnostic Procedure.>

A

Intake system

Loosened or cracked intake duct

B

Loosened or cracked PCV hose

C

Loosened or cracked vacuum hose

C

Defective intake manifold gasket

B

Defective throttle body gasket

B

Dirty air cleaner element

C

Fuel line

Clogged fuel line

C

Lack of or insufficient fuel

B

Belt

Trouble

B

Defective timing

B

Compression

Incorrect valve clearance

C

Loosened spark plug or defective gasket

C

Loosened cylinder head bolt or defective gasket

C

Improper valve sealing

C

Defective valve stem

C

Worn or broken valve spring

B

Worn or stuck piston rings, cylinder and piston

C

Incorrect valve timing

B

Improper engine oil (low viscosity)

B

Symptom

Problem parts, etc.

Possible cause

Rank