Subaru Legacy IV (2008 year). Service 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)
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