General Description - Subaru Impreza 2004 Service Manual

MECHANICAL

1. General Description

A: SPECIFICATIONS
1. DOHC TURBO MODEL (EXCEPT FOR STi AND AUSTRALIA MODEL)
Type
Valve arrangement
Bore Stroke
Piston displacement
Compression ratio
Compression pres-
sure (at 200 — 300
rpm)
Number of piston rings
Engine
Intake valve timing
Exhaust valve timing
Valve clearance
Idling speed
[At neutral position on MT or "P" or
"N" range on AT]
Firing order
Ignition timing
NOTE:
STD: Standard I.D.: Inner Diameter O.D.: Outer Diameter OS: Oversize US: Undersize
Belt
tension Protrusion of adjuster rod
adjuster
Spacer O.D.
Tensioner bush I.D.
Belt
Clearance between spacer and bush
tensioner
Side clearance of spacer
Bend limit
Thrust clearance
Cam lobe height
Camshaft
Journal O.D.
Oil clearance
Surface warpage limit
Cylinder
Surface grinding limit
head
Standard height
General Description
mm (in)
3
cm (cu in)
2
kPa (kgf/cm
Opening
Closing
Opening
Closing
Intake mm (in)
Exhaust mm (in)
BTDC/rpm
STD
Limit
STD
Limit
STD
Limit
STD
Intake
Limit
STD
Exhaust
Limit
Front
STD
Center
rear
STD
Limit
ME(H4DOTC)-2
Horizontally opposed, liquid cooled, 4-cylinder,
4-stroke gasoline engine
Belt driven, double overhead camshaft, 4-valve/cylinder
92
981 — 1,177 (10 — 12, 142 — 171)
, psi)
Pressure ring: 2, Oil ring: 1
0.20 0.02 (0.0079 0.0008)
0.35 0.02 (0.0138 0.0008)
700 100 (No load)
rpm
800 150 (A/C switch ON)
5.2 — 6.2 mm (0.205 — 0.244 in)
17.955 — 17.975 mm (0.7069 — 0.7077 in)
18.0 — 18.08 mm (0.7087 — 0.7118 in)
0.025 — 0.125 mm (0.0010 — 0.0049 in)
0.175 mm (0.0069 in)
0.2 — 0.55 mm (0.0079 — 0.0217 in)
0.81 mm (0.0319 in)
0.020 mm (0.0079 in)
0.040 — 0.080 mm (0.0016 — 0.0031 in)
0.10 mm (0.0039 in)
46.25 — 46.35 mm (1.821 — 1.825 in)
46.15 mm (1.817 in)
46.15 — 46.25 mm (1.817 — 1.821 in)
46.05 mm (1.813 in)
37.946 — 37.963 mm (1.4939 — 1.4946 in)
29.946 — 29.963 mm (1.1790 — 1.1796 in)
0.037 — 0.072 mm (0.0015 — 0.0028 in)
0.10 mm (0.0039 in)
0.05 mm (0.0020 in)
0.3 mm (0.012 in)
127.5 mm (5.02 in)
75 (3.62 2.95)
1,994 (121.67)
8.0
BTDC 10
ABDC 50
BBDC 53
ATDC 7
1 3 2 4
12 10 /700