Subaru Legacy (2005 year). Manual - part 54

IN(H4SO 2.0)-9

INTAKE (INDUCTION)

Resonator Chamber

6. Resonator Chamber

A: REMOVAL

The resonator chamber and air cleaner case are in-
tegrated into one unit; therefore, refer to “Air Clean-
er Case” for removal procedure. <Ref. to IN(H4SO
2.0)-5, REMOVAL, Air Cleaner Case.>

B: INSTALLATION

The resonator chamber and air cleaner case are in-
tegrated into one unit; therefore, refer to “Air Clean-
er Case” for installation procedure. <Ref. to
IN(H4SO 2.0)-5, INSTALLATION, Air Cleaner
Case.>

C: INSPECTION

Check for cracks or loose connections.

IN(H4SO 2.0)-10

INTAKE (INDUCTION)

Resonator Chamber

MECHANICAL

ME(H4SO 2.0)

Page

1.

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

2.

Compression .............................................................................................22

3.

Idle Speed .................................................................................................23

4.

Ignition Timing...........................................................................................24

5.

Intake Manifold Vacuum............................................................................25

6.

Engine Oil Pressure ..................................................................................26

7.

Fuel Pressure............................................................................................27

8.

Valve Clearance........................................................................................28

9.

Engine Assembly ......................................................................................30

10.

Engine Mounting .......................................................................................35

11.

Preparation for Overhaul...........................................................................36

12.

V-belt.........................................................................................................37

13.

Crank Pulley..............................................................................................40

14.

Timing Belt Cover......................................................................................42

15.

Timing Belt ................................................................................................43

16.

Cam Sprocket ...........................................................................................48

17.

Crank Sprocket .........................................................................................50

18.

Valve Rocker Assembly ............................................................................51

19.

Camshaft...................................................................................................53

20.

Cylinder Head ...........................................................................................57

21.

Cylinder Block ...........................................................................................64

22.

Intake and Exhaust Valve .........................................................................85

23.

Piston ........................................................................................................86

24.

Connecting Rod ........................................................................................87

25.

Crankshaft.................................................................................................88

26.

Engine Trouble in General ........................................................................89

27.

Engine Noise.............................................................................................95

ME(H4SO 2.0)-2

MECHANICAL

General Description

1. General Description

A: SPECIFICATION

NOTE:
US: undersize OS: oversize

Model

2.0 L

2.5 L

Engine

Cylinder arrangement

Horizontally opposed, liquid cooled, 4-cylin-

der,

4-stroke gasoline engine

Valve system mechanism

Belt driven,

single over-head camshaft,

4 valve/cylinder

Bore 

× Stroke

mm (in)

92 

× 75 (3.62 × 2.95)

99.5 

× 79.0 

(3.917 

× 3.110)

Displacement

cm

3

 (cu in)

1,994 (121.67)

2,457 (150)

Compression ratio

10.0

Compression pressure (at 350 
rpm)

kPa (kgf/cm

2

, psi)

1,020 — 1,275 (10.4 — 13.0, 148 — 185)

Number of piston rings

Pressure ring: 2, Oil ring: 1

Intake valve timing

Open

BTDC 2

°

BTDC 2

°

Close

ABDC 54

°

ABDC 56

°

Exhaust valve timing

Open

BBDC 39

°

BBDC 50

°

Close

ATDC 5

°

ATDC 8

°

Valve clearance

mm (in)

Intake

0.20

±0.04 (0.0079±0.0016)

Exhaust

0.25

±0.04 (0.0098±0.0016)

Idling speed [at neutral position on MT, or “P” or 
“N” range on AT]

rpm

650

±100 (No load)

800

±100 (A/C ON)

Ignition order

1 

→ 3 → 2 → 4

Ignition timing

BTDC/rpm

13

°±10°/650

Belt ten-
sion 
adjuster

Protrusion of adjuster rod

mm (in)

5.2 — 6.2 (0.205 — 0.244)

Belt ten-
sioner

Spacer O.D.

mm (in)

17.955 — 17.975 (0.7069 — 0.7077)

Tensioner bushing I.D.

mm (in)

18.00 — 18.08 (0.7087 — 0.7118)

Clearance between spacer and bush-
ing

mm (in) Standard

0.025 — 0.125 (0.0010 — 0.0049)

Side clearance of spacer

mm (in) Standard

0.20 — 0.55 (0.0079 — 0.0217)

Valve rocker 
arm

Clearance between shaft and arm

mm (in) Standard

0.020 — 0.054 (0.0008 — 0.0021)

Camshaft

Bend limit

mm (in)

0.020 (0.00079)

Thrust clearance

mm (in) Standard

0.030 — 0.090 (0.0012 — 0.0035)

Cam lobe height

mm (in)

2.0 L

Intake

Standard

39.646 — 39.746 (1.5609 — 1.5648)

Exhaust

Standard

39.351 — 39.451 (1.5493 — 1.5532)

2.5 L

Intake

Standard

39.485 — 39.585 (1.5545 — 1.5585)

Exhaust

Standard

39.904 — 40.004 (1.5710 — 1.5750)

Camshaft journal O.D.

mm (in)

31.928 — 31.945 (1.2570 — 1.2577)

Camshaft journal hole I.D.

mm (in)

32.000 — 32.018 (1.2598 — 1.2605)

Oil clearance

mm (in) Standard

0.055 — 0.090 (0.0022 — 0.0035)

Cylinder 
head

Surface warpage limit
(mating with cylinder block)

mm (in)

0.03 (0.001)

Grinding limit

mm (in)

0.1 (0.004)

Standard height

mm (in)

97.5 (3.84)