Subaru Impreza 2002 Service Manual page 879

MECHANICAL
1. General Description
A: SPECIFICATIONS
Model
Type
Valve arrangement
Bore x Stroke
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" position on
AT]
Firing order
Ignition timing
NOTE:
STD: Standard I.D.: Inner Diameter O.D.: Outer Diameter US: Undersize OS: Oversize
Belt
tensioner Protrusion of adjuster rod
adjuster
Spacer O.D.
Tensioner bush I.D.
Belt
Clearance between spacer and bush
tensioner
Side clearance of spacer
Valve
Clearance between shaft and arm
rocker arm
GENERAL DESCRIPTION
mm (in)
3
cm (cu in)
2
kPa (kg/cm , psi)
Opening
Closing
Opening
Closing
Intake mm (in)
Exhaust mm (in)
rpm
BTDC/rpm
STD
Limit
STD
Limit
STD
Limit
1600 cc
Horizontally opposed, liquid cooled, 4-cylinder, 4-stroke gasoline
Belt driven, single over-head camshaft, 4-valve/cylinder
87.9 x 65.8
92 x 75 (3.62 x 2.95)
(3.46 x 2.591)
1,597 (97.45)
1,020 — 1,275 (10.4 — 13.0, 148 — 185)
Pressure ring: 2, Oil ring: 1
10° BTDC
46° ABDC
42° BBDC
10° ATDC
0.20±0.02 (0.0079±0.0008)
0.25±0.02 (0.0098±0.0008)
700±100 (No load)
850±100 (A/C switch ON)
5°±10°/700
5.2 — 6.2 mm (0.205 — 0.244 in)
17.955 — 17.975 mm (0.7069 — 0.7077 in)
18.00 — 18.08 mm (0.7087 — 0.7118 in)
0.025 — 0.125 mm (0.0010 — 0.0049 in)
0.20 — 0.55 mm (0.0079 — 0.0217 in)
0.020 — 0.054 mm (0.0008 — 0.0021 in)
ME-2
2000 cc 2500 cc
engine
99.5 x 79.0
(3.917 x 3.110)
1,994 (121.67) 2,457 (150)
10.0
4° BTDC 1° BTDC
48° ABDC 51° ABDC
48° BBDC 50° BBDC
4° ATDC 6° ATDC
1 → 3 → 2 → 4
10°±10°/700
0.175 mm (0.0069 in)
0.81 mm (0.0319 in)
0.10 mm (0.0039 in)