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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

(cu in)

3,000 (183)

Compression ratio

10.7

Compression pressure (350 rpm and
fully open throttle):

kPa (kgf/cm

, 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°

ABDC 23°

Max. retard

Open

ATDC 3°

ABDC 73°

Exhaust valve timing

Open

BBDC 46°

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

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

89.205 — 89.215 (3.5120 — 3.5124)

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

89.205 — 89.215 (3.5120 — 3.5124)

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

(1)

(9)

(2)

(10)

(3)

(4)

(5)

(6)

(8)

(7)

Content .. 467 468 469 470 ..