Subaru Legacy IV (2008 year). Manual — part 469

ME(H6DO)-2

General Description

MECHANICAL

1. General Description

A: SPECIFICATION

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 46°

Close

ATDC 6°

Valve clearance

mm (in)

Intake

0.20

+0.04

-0.06

(0.0079

+0.0016

-0.0024

)

Exhaust

0.35

r0.05 (0.0138r0.0020)

Idle rpm [“P” or “N” range]

rpm

No load

650

r50

A/C ON

770

r50

Ignition order

1

o 6 o 3 o 2 o 5 o 4

Ignition timing

BTDC/rpm

15°

r8°/650

ME(H6DO)-3

General Description

MECHANICAL

NOTE:
OS: Oversize
US: Undersize

Camshaft

Bending limit

mm (in)

0.020 (0.00079)

Side 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

38.14 — 38.24 (1.5016 — 1.5055)

Exhaust

Standard

40.45 — 40.55 (1.5925 — 1.5965)

Cam base circle diameter

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

Warping limit
(Mating surface with cylinder block)

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

r0.05 (4.88r0.0020)

Valve seat

Seating 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)

Valve

Head edge thickness

mm (in)

Intake

Standard

1.0 (0.039)

Exhaust

Standard

1.2 (0.047)

Stem outer diameter

mm (in)

Intake

5.455 — 5.470 (0.2148 — 0.2154)

Exhaust

5.445 — 5.460 (0.2144 — 0.2150)

Stem oil clearance

mm (in)

Intake

Standard

0.030 — 0.057 (0.0012 — 0.0022)

Exhaust

Standard

0.040 — 0.067 (0.0016 — 0.0026)

Overall length

mm (in)

Intake

99.7 (3.925)

Exhaust

105.2 (4.142)

Outer diameter of valve lifter

mm (in)

32.959 — 32.975 (1.2976 — 1.2982)

Valve spring

Free length

mm (in)

Intake

Inner

39.55 (1.5571)

Outer

41.18 (1.6213)

Exhaust

46.32 (1.8236)

Squareness

Intake

Inner

2.5°, 1.7 mm (0.067 in) or less

Outer

2.5°, 1.8 mm (0.071 in) or less

Exhaust

2.5°, 2.0 mm (0.079 in) or less

Cylinder
block

Standard height

mm (in)

202 (7.95)

Warping limit
(Mating surface with cylinder head)

mm (in) Standard

0.02 (0.0008)

Cylinder inner diameter

mm (in) Standard

A

89.205 — 89.215 (3.5120 — 3.5124)

B

89.195 — 89.205 (3.5116 — 3.5120)

Cylindricality

mm (in) Standard

0.030 (0.0012)

Out-of-roundness

mm (in) Standard

0.010 (0.0004)

Piston clearance

mm (in) Standard

–0.010 — 0.010 (–0.0004 — 0.0004)

Cylinder inner diameter boring limit (diameter)

mm (in)

To 89.715 (3.5321)

ME(H6DO)-4

General Description

MECHANICAL

Piston

Outer diameter

mm (in)

Standard

A

89.205 — 89.215 (3.5120 — 3.5124)

B

89.195 — 89.205 (3.5116 — 3.5120)

0.25 (0.0098) OS

89.445 — 89.465 (3.5215 — 3.5222)

0.50 (0.0197) OS

89.695 — 89.715 (3.5313 — 3.5321)

Inner diameter of piston pin hole

mm (in) Standard

22.000 — 22.006 (0.8661 — 0.8664)

Piston pin

Outer diameter

mm (in) Standard

21.994 — 22.000 (0.8659 — 0.8661)

Standard clearance between piston and piston pin

mm (in) Standard

0.004 — 0.008 (0.0002 — 0.0003)

Piston ring

Ring closed gap

mm (in)

Top ring

Standard

0.20 — 0.35 (0.0079 — 0.0138)

Second ring

Standard

0.35 — 0.50 (0.0138 — 0.0197)

Oil ring

Standard

0.20 — 0.60 (0.0079 — 0.0236)

Ring groove gap

mm (in)

Top ring

Standard

0.040 — 0.080 (0.0016 — 0.0031)

Second ring

Standard

0.030 — 0.070 (0.0012 — 0.0028)

Oil ring

Standard

0.045 — 0.125 (0.0018 — 0.0049)

Connecting
rod

Thrust clearance

mm (in) Standard

0.070 — 0.330 (0.0028 — 0.0130)

Bearing of
large end

Oil clearance

mm (in) Standard

0.016 — 0.043 (0.0006 — 0.0017)

Bearing size (Thickness at center)

mm (in)

Standard

1.490 — 1.506 (0.0587 — 0.0593)

0.03 (0.0012) US

1.509 — 1.513 (0.0594 — 0.0596)

0.05 (0.0020) US

1.519 — 1.523 (0.0598 — 0.0600)

0.25 (0.0098) US

1.619 — 1.623 (0.0637 — 0.0639)

Bushing of
small end

Clearance between piston pin and bushing

mm (in) Standard

0 — 0.022 (0 — 0.0009)

Crankshaft

Crank pin and crank journal

Out-of-roundness

mm (in)

0.005 (0.0002)

Cylindricality

mm (in)

0.006 (0.0002)

Crank pin outer diameter

mm (in)

Standard

51.984 — 52.000 (2.0466 — 2.0472)

0.03 (0.0012) US

51.954 — 51.970 (2.0454 — 2.0461)

0.05 (0.0020) US

51.934 — 51.950 (2.0446 — 2.0453)

0.25 (0.0098) US

51.734 — 51.750 (2.0368 — 2.0374)

Crank journal outer diameter

mm (in)

#1, #3,
#5, #7

Standard

63.992 — 64.008 (2.5194 — 2.5200)

0.03 (0.0012) US

63.962 — 63.978 (2.5182 — 2.5188)

0.05 (0.0020) US

63.942 — 63.958 (2.5174 — 2.5180)

0.25 (0.0098) US

63.742 — 63.758 (2.5095 — 2.5102)

#2, #4,
#6

Standard

63.992 — 64.008 (2.5194 — 2.5200)

0.03 (0.0012) US

63.962 — 63.978 (2.5182 — 2.5188)

0.05 (0.0020) US

63.942 — 63.958 (2.5174 — 2.5180)

0.25 (0.0098) US

63.742 — 63.758 (2.5095 — 2.5102)

Thrust clearance

mm (in) Standard

0.030 — 0.115 (0.0012 — 0.0045)

Oil clearance

mm (in) Standard

0.010 — 0.030 (0.0004 — 0.0012)

Main bearing

Bearing size
(Thickness at center)

mm (in)

#1, #3,
#5, #7

Standard

1.992 — 2.005 (0.0784 — 0.0789)

0.03 (0.0012) US

2.011 — 2.014 (0.0792 — 0.0793)

0.05 (0.0020) US

2.021 — 2.024 (0.0796 — 0.0797)

0.25 (0.0098) US

2.121 — 2.124 (0.0835 — 0.0836)

#2, #4,
#6

Standard

1.996 — 2.009 (0.0786 — 0.0791)

0.03 (0.0012) US

2.015 — 2.018 (0.0793 — 0.0794)

0.05 (0.0020) US

2.025 — 2.028 (0.0797 — 0.0798)

0.25 (0.0098) US

2.125 — 2.128 (0.0837 — 0.0838)

ME(H6DO)-5

General Description

MECHANICAL

B: COMPONENT

1. V-BELT

(1)

V-belt

(6)

Generator plate

Tightening torque:N·m (kgf-m, ft-lb)

(2)

Collector cover bracket

(7)

A/C compressor stay

T1: 6.4 (0.7, 4.7)

(3)

Belt tension adjuster ASSY

(8)

Idler pulley

T2: 20 (2.0, 14.8)

(4)

Power steering pump bracket

(9)

Idler pulley cover

T3: 25 (2.5, 18.4)

(5)

Generator

(10)

Cushion

T4: 33 (3.4, 24.3)

ME-03100

T1

T3

T3

T2

T4

(1)

(9)

(2)

(10)

(10)

(3)

(4)

(5)

(6)

(8)

(7)