Subaru Impreza 2004 Service Manual page 7

MECHANICAL
Crankshaft Crankshaft bearing thick-
bearing ness
2. STi 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]
Firing order
Ignition timing
NOTE:
STD: Standard I.D.: Inner Diameter O.D.: Outer Diameter OS: Oversize US: Undersize
General Description
STD
0.03 mm
(0.0012
in) US
0.05 mm
#1, #3
(0.0020
in) US
0.25 mm
(0.0098
in) US
STD
0.03 mm
(0.0012
in) US
0.05 mm
#2, #4, #5
(0.0020
in) US
0.25 mm
(0.0098
in) US
mm (in)
3
cm (cu in)
2
kPa (kgf/cm
Max. retard
Opening
Min. advance
Max. retard
Closing
Min. advance
Opening
Closing
Intake mm (in)
Exhaust mm (in)
BTDC/rpm
ME(H4DOTC)-6
1.998 — 2.011 mm (0.0787 — 0.0792 in)
2.017 — 2.020 mm (0.0794 — 0.0795 in)
2.027 — 2.030 mm (0.0798 — 0.0799 in)
2.127 — 2.130 mm (0.0837 — 0.0839 in)
2.000 — 2.013 mm (0.0787 — 0.0793 in)
2.019 — 2.022 mm (0.0795 — 0.0796 in)
2.029 — 2.032 mm (0.0799 — 0.0800 in)
2.129 — 2.132 mm (0.0838 — 0.0839 in)
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)
75 (3.62 2.95)
1,994 (121.67)
8.0
ATDC 6
BTDC 24
ABDC 68
ABDC 38
BBDC 58
ATDC 10
1 3 2 4
12 10 /700