General Description - Subaru Legacy 2004 Service Manual

MECHANICAL

1. General Description

A: SPECIFICATION
Model
Cylinder arrangement
Valve system mechanism
Bore ! Stroke
Displacement
Compression ratio
Compression pressure (at 350 rpm)
Number of piston rings
Engine
Intake valve timing
Exhaust valve timing
Valve clearance
Idle speed [at neutral position on MT, or "P" or
"N" range on AT]
Ignition order
Ignition timing
NOTE:
US: undersize OS: oversize
Belt ten-
sion Protrusion of adjuster rod
adjuster
Spacer O.D.
Tensioner bushing I.D.
Belt ten-
Clearance between spacer
sioner
and bushing
Side clearance of spacer
Valve rocker Clearance between shaft and
arm arm
Bend limit
Side clearance
Cam lobe height
Camshaft
Camshaft journal O.D.
Camshaft journal hole I.D.
Oil clearance
Surface warpage limit (mating with cylinder
block)
Cylinder
Head Grinding limit
Standard height
General Description
mm (in)
Intake
2.0 L
Exhaust
mm (in)
Intake
2.5 L
Exhaust
ME(H4SO 2.0)-2
Horizontally opposed, liquid cooled, 4-cylinder,
Belt driven, single over-head camshaft, 4-valve/
92 ! 75 (3.62 ! 2.95)
mm (in)
3
cm (cu in)
2
kPa (kg/cm ,
psi)
Open
Close
Open
Close
Intake
Exhaust
rpm
BTDC/rpm
mm (in)
mm (in)
mm (in)
mm (in) Standard
mm (in) Standard
mm (in) Standard
mm (in)
mm (in) Standard
Standard
Standard
Standard
Standard
mm (in)
mm (in)
mm (in) Standard
mm (in)
mm (in)
mm (in)
2.0 L
4-stroke gasoline engine
cylinder
(3.917 ! 3.110)
1,994 (121.67)
10.0
1,020 — 1,275 (10.4 — 13.0, 148 — 185)
Pressure ring: 2, Oil ring: 1
BTDC 2"
ABDC 54"
BBDC 39"
ATDC 5"
0.20#0.04 (0.0079#0.0016)
0.25#0.04 (0.0098#0.0016)
650#100 (No load)
800#100 (A/C ON)
1 $ 3 $ 2 $ 4
13"#10"/650
5.2 — 6.2 (0.205 — 0.244)
17.955 — 17.975 (0.7069 — 0.7077)
18.00 — 18.08 (0.7087 — 0.7118)
0.025 — 0.125 (0.0010 — 0.0049)
0.20 — 0.55 (0.0079 — 0.0217)
0.020 — 0.054 (0.0008 — 0.0021)
0.020 (0.00079)
0.030 — 0.090 (0.0012 — 0.0035)
39.646 — 39.746 (1.5609 — 1.5648)
39.351 — 39.451 (1.5493 — 1.5532)
39.485 — 39.585 (1.5545 — 1.5585)
39.904 — 40.004 (1.5710 — 1.5750)
31.928 — 31.945 (1.2570 — 1.2577)
32.000 — 32.018 (1.2598 — 1.2605)
0.055 — 0.090 (0.0022 — 0.0035)
0.03 (0.001)
0.1 (0.004)
97.5 (3.84)
2.5 L
99.5 ! 79.0
2,457 (150)
BTDC 2"
ABDC 56"
BBDC 50"
ATDC 8"