Subaru Legacy (2005 year). Manual - part 381

IN(H6DO)-9

INTAKE (INDUCTION)

Resonator Chamber

6. Resonator Chamber

A: REMOVAL

Refer to “Air Cleaner Case” for removal procedure
because the resonator chamber forms a single unit
with air cleaner case. <Ref. to IN(H6DO)-5, RE-
MOVAL, Air Cleaner Case.>

B: INSTALLATION

Refer to “Air Cleaner Case” for installation proce-
dure because the resonator chamber forms a sin-
gle unit with air cleaner case. <Ref. to IN(H6DO)-6,
INSTALLATION, Air Cleaner Case.>

C: INSPECTION

Check for cracks or loose connections.

IN(H6DO)-10

INTAKE (INDUCTION)

Resonator Chamber

MECHANICAL

ME(H6DO)

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.

V-belt.........................................................................................................33

10.

Engine Assembly ......................................................................................34

11.

Engine Mounting .......................................................................................42

12.

Preparation for Overhaul...........................................................................43

13.

Crank Pulley..............................................................................................44

14.

Front Chain Cover.....................................................................................45

15.

Timing Chain Assembly ............................................................................47

16.

Cam Sprocket ...........................................................................................52

17.

Crank Sprocket .........................................................................................53

18.

Rear Chain Cover .....................................................................................54

19.

Camshaft...................................................................................................56

20.

Cylinder Head ...........................................................................................60

21.

Cylinder Block ...........................................................................................65

22.

Oil Flow Control Solenoid Valve................................................................79

23.

Oil Switching Solenoid Valve ....................................................................80

24.

ATF Warmer Cock ....................................................................................81

25.

Intake And Exhaust Valve .........................................................................82

26.

Piston ........................................................................................................83

27.

Connecting Rod ........................................................................................84

28.

Crankshaft.................................................................................................85

29.

Engine Trouble in General ........................................................................86

30.

Engine Noise.............................................................................................93

ME(H6DO)-2

MECHANICAL

General Description

1. General Description

A: SPECIFICATION

NOTE:
OS: Oversize US: undersize

Engine

Cylinder arrangement

Horizontally opposed, liquid cooled, 6-cylinder,

4-stroke gasoline engine

Valve system mechanism

Chain driven, double overhead camshaft,

4-valve / cylinder

Bore 

× Stroke

mm (in)

89.2 

× 80 (3.512 × 3.150)

Displacement

cm

3

 (cu in)

3,000 (183)

Compression ratio

10.7

Compression pressure (350 rpm and fully 
open throttle):

kPa (kgf/cm

2

, psi)

1,275 — 1,471 (13.0 — 15.0, 185 — 213)

Number of piston rings

Pressure ring: 2, Oil ring: 1

Intake valve timing

Min. 
advance

Open

BTDC 47

°

Close

ABDC 23

°

Max. 
retard

Open

ATDC 3

°

Close

ABDC 73

°

Exhaust valve timing

Open

BBDC 60

°

Close

ATDC 6

°

Valve clearance

mm (in)

Intake

0.20

+0.04

−0.06

 (0.0079

+0.0016

−0.0024

)

Exhaust

0.35

±0.05 (0.0138±0.020)

Idle speed [“P” or “N” range]

rpm

No 
load

650

±50

A/C 
ON

770

±50

Ignition order

1 

→ 6 →3 → 2 → 5 → 4

Ignition timing

BTDC/rpm

15

°±8°/650

Camshaft

Thrust clearance

mm (in)

Intake

Standard

0.075 — 0.135 (0.0030 — 0.0053)

Exhaust

Standard

0.030 — 0.090 (0.0012 — 0.0035)

Cam lobe height

mm (in)

Intake

HIGH

Standard

42.09 — 42.19 (1.6571 — 1.6610)

LOW1

Standard

38.14 — 38.24 (1.5016 — 1.5055)

LOW2

Standard

34.94 — 35.04 (1.3756 — 1.3795)

Exhaust

Standard

41.65 — 41.75 (1.6398 — 1.6437)

Cam base circle diam-
eter

mm (in)

Intake

HIGH

Standard

32.00 (1.2598)

LOW1

Standard

31.84 (1.2535)

LOW2

Standard

31.84 (1.2535)

Exhaust

Standard

32.00 (1.2598)

Journal O.D.

mm (in)

Front

Standard

37.946 — 37.963 (1.4939 — 1.4946)

Except for front

Standard

25.946 — 25.963 (1.0215 — 1.0222)

Oil clearance

mm (in) Standard

0.037 — 0.072 (0.0015 — 0.0028)

Cylinder 
head

Flatness

mm (in) Standard

0.02 (0.0008)

Inner diameter of valve lifter hole

mm (in)

32.994 — 33.016 (1.2990 — 1.2998)

Standard height

mm (in)

124

±0.05 (4.88±0.0020)

Valve seat

Refacing angle

90

°

Contacting width

mm (in)

Intake

Standard

1.0 (0.039)

Exhaust

Standard

1.5 (0.059)

Valve guide

Inside diameter

mm (in)

5.500 — 5.512 (0.2165 — 0.2170)

Protrusion above head

mm (in)

11.4 — 11.8 (0.449 — 0.465)