Subaru Legacy (2005 year). Service 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
General Description . . . . . . . . . . . . . . . . . . . . . 2
Compression . . . . . . . . . . . . . . . . . . . . . . . .22
Idle Speed . . . . . . . . . . . . . . . . . . . . . . . . .23
Ignition Timing. . . . . . . . . . . . . . . . . . . . . . ...24
Intake Manifold Vacuum. . . . . . . . . . . . . . . . . . . 25
Engine Oil Pressure . . . . . . . . . . . . . . . . . . . . ..26
Fuel Pressure. . . . . . . . . . . . . . . . . . . . . . . 27
Valve Clearance. . . . . . . . . . . . . . . . . . . . . . 28
V-belt. . . . . . . . . . . . . . . . . . . . . . . . . . .33
Engine Assembly . . . . . . . . . . . . . . . . . . . . . ..34
Engine Mounting . . . . . . . . . . . . . . . . . . . . . ...42
Preparation for Overhaul. . . . . . . . . . . . . . . . . . ...43
Crank Pulley. . . . . . . . . . . . . . . . . . . . . . . ..44
Front Chain Cover. . . . . . . . . . . . . . . . . . . . . .45
Timing Chain Assembly . . . . . . . . . . . . . . . . . . . 47
Cam Sprocket . . . . . . . . . . . . . . . . . . . . . . ...52
Crank Sprocket . . . . . . . . . . . . . . . . . . . . . . .53
Rear Chain Cover . . . . . . . . . . . . . . . . . . . . . .54
Camshaft. . . . . . . . . . . . . . . . . . . . . . . . ...56
Cylinder Head . . . . . . . . . . . . . . . . . . . . . . ...60
Cylinder Block . . . . . . . . . . . . . . . . . . . . . . ...65
Oil Flow Control Solenoid Valve. . . . . . . . . . . . . . . . 79
Oil Switching Solenoid Valve . . . . . . . . . . . . . . . . . 80
ATF Warmer Cock . . . . . . . . . . . . . . . . . . . . . 81
Intake And Exhaust Valve . . . . . . . . . . . . . . . . . . .82
Piston . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Connecting Rod . . . . . . . . . . . . . . . . . . . . . . 84
Crankshaft. . . . . . . . . . . . . . . . . . . . . . . . .85
Engine Trouble in General . . . . . . . . . . . . . . . . . . 86
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)
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