Mitsubishi Colt Ralliart. Manual — part 259
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REAR AXLE HUB ASSEMBLY
REAR AXLE
27-8
REMOVAL SERVICE POINTS
<<A>>BRAKE DRUM REMOVAL
AC207894 AC
Bolts
(M8×1.25)
If the brake drum is seized, install M8
× 1.25 bolts as
shown, and remove the drum by tightening the bolts
evenly and gradually.
<<B>>CALIPER ASSEMBLY REMOVAL
Secure the removed caliper assembly with wire, etc.
<<C>>BRAKE DISC REMOVAL
AC311433 AC
Bolts
(M8 × 1.25)
If the brake disc is seized, install M8
× 1.25 bolts as
shown, and remove the drum by tightening the bolts
evenly and gradually. <4A9>
INSTALLATION SERVICE POINT
>>A<<REAR HUB ASSEMBLY INSTALLA-
TION
AC401302
Direct the arrow mark forward, and install the rear
hub assembly.
INSPECTION
M1271002100281
• Check the rear hub assembly for crack or dam-
age.
Main
Index
Group
TOC
GROUP 11B
ENGINE OVERHAUL
<4A9>
CONTENTS
GENERAL INFORMATION . . . . . . . .
GENERAL SPECIFICATIONS . . . . . .
SERVICE SPECIFICATIONS. . . . . . .
TORQUE SPECIFICATIONS . . . . . . .
SEALANTS . . . . . . . . . . . . . . . . . . . .
SPECIAL TOOLS. . . . . . . . . . . . . . . .
ALTERNATOR AND IGNITION
SYSTEM . . . . . . . . . . . . . . . . . . . . . . .
REMOVAL AND INSTALLATION . . . . . . . .
FUEL AND EMISSION PARTS . . . . .
REMOVAL AND INSTALLATION . . . . . . . .
INLET MANIFOLD . . . . . . . . . . . . . . .
REMOVAL AND INSTALLATION . . . . . . . .
EXHAUST MANIFOLD. . . . . . . . . . . .
REMOVAL AND INSTALLATION . . . . . . . .
OIL PAN AND TIMING CHAIN
CASE. . . . . . . . . . . . . . . . . . . . . . . . . .
REMOVAL AND INSTALLATION . . . . . . . .
TIMING CHAIN . . . . . . . . . . . . . . . . . .
REMOVAL AND INSTALLATION . . . . . . . .
INSPECTION. . . . . . . . . . . . . . . . . . . . . . . .
CAMSHAFT . . . . . . . . . . . . . . . . . . . .
REMOVAL AND INSTALLATION . . . . . . . .
INSPECTION. . . . . . . . . . . . . . . . . . . . . . . .
CYLINDER HEAD AND VALVES. . . .
REMOVAL AND INSTALLATION . . . . . . . .
INSPECTION. . . . . . . . . . . . . . . . . . . . . . . .
PISTON AND CONNECTING ROD . .
REMOVAL AND INSTALLATION . . . . . . . .
INSPECTION. . . . . . . . . . . . . . . . . . . . . . . .
CRANKSHAFT AND CYLINDER
BLOCK . . . . . . . . . . . . . . . . . . . . . . . .
REMOVAL AND INSTALLATION . . . . . . . .
INSPECTION. . . . . . . . . . . . . . . . . . . . . . . .
Main
Index
Group
TOC
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GENERAL INFORMATION
ENGINE OVERHAUL <4A9>
11B-2
GENERAL INFORMATION
M1113000100976
Vehicle name
Vehicle
model
Engine model
Displacement
mL
Specification
Colt
Z23A
4A91
1,499
Double overhead camshaft, 16-valve
GENERAL SPECIFICATIONS
M1113000200962
Item
4A91
Total displacement mL
1,499
Bore
× stroke mm
75.0
× 84.8
Compression ratio
10.0
Combustion chamber
Pentroof type
Camshaft arrangement
DOHC
Number of valve
Intake
2
Exhaust
2
Valve timing
Intake opening
BTDC 31
° − ATDC 19°
Intake closing
ABDC 21
° − ABDC 71°
Exhaust opening
BBDC 39
°
Exhaust closing
ATDC 5
°
Fuel system
Electronically controlled multipoint fuel injection
Rocker arm
None
Auto-lash adjuster
None
SERVICE SPECIFICATIONS
M1113000301014
Item
Standard value
Limit
TIMING CHAIN
Valve clearance mm
Intake
0.22
−
Exhaust
0.30
−
CAMSHAFT
Cam height mm
Intake
44.71
44.21
Exhaust
44.28
43.78
CYLINDER HEAD AND VALVES
Cylinder head bottom face distortion mm
0.03 or less
0.2
Cylinder head bottom surface grinding limit (Total resurfacing
depth of both cylinder head and cylinder block) mm
−
0.2
Cylinder head overall height mm
112.9
− 113.1
−
Main
Index
Group
TOC
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SERVICE SPECIFICATIONS
ENGINE OVERHAUL <4A9>
11B-3
Valve margin mm
Intake
1.35
0.85
Exhaust
1.85
1.35
Valve stem outside diameter mm
Intake
4.965
− 4.980
−
Exhaust
4.955
− 4.970
−
Valve face angle
45
°− 45.5°
−
Valve stem-to-guide clearance mm
Intake
0.020
− 0.047
0.10
Exhaust
0.030
− 0.057
0.15
Valve length mm
Intake
89.61
89.11
Exhaust
90.94
90.44
Valve stem protrusion mm
Intake
38.46
38.96
Exhaust
38.49
38.99
Valve spring free length mm
43.1
42.1
Valve spring load / installed height N/mm
152/33.4
−
Valve spring out-of-squareness
2
° or less
4
°
Valve seat contact width mm
1.1
− 1.5
−
Valve guide inside diameter mm
5.000
− 5.012
−
Valve guide installed height mm
7.9
− 8.3
−
PISTON AND CONNECTING ROD
Piston outer diameter mm
75
−
Piston ring to ring groove clearance mm
No. 1
0.03
− 0.07
0.1
No. 2
0.02
− 0.06
0.1
Piston ring end gap mm
No. 1
0.15
− 0.30
0.8
No. 2
0.20
− 0.40
0.8
Oil ring
0.10
− 0.40
1.0
Piston pin outer diameter mm
18
−
Piston pin press-fitting load (at room temperature) N
5,000
− 11,000
−
Crankshaft pin oil clearance mm
0.014
− 0.059
0.1
Connecting rod big end thrust clearance mm
0.10
− 0.35
0.4
CRANKSHAFT AND CYLINDER BLOCK
Crankshaft end play mm
0.09
− 0.27
0.3
Crankshaft journal outer diameter mm
46
−
Crankshaft pin outer diameter mm
40
−
Crankshaft journal oil clearance mm
0.014
− 0.034
0.1
Cylinder block top surface distortion mm
0.05
0.1
Cylinder block top face grinding limit (Total resurfacing depth of
both cylinder head and cylinder block) mm
−
0.2
Cylinder block overall height mm
280
−
Item
Standard value
Limit
Main
Index
Group
TOC
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