Mitsubishi Grandis. Manual — part 652
HOW TO USE THIS MANUAL
ENGINE OVERHAUL
11B-3
ENGINE OVERHAUL
11-54
CRANKSHAFT AND CYLINDER BLOCK
REMOVAL AND INSTALLATION
Section title
Page number
Procedures and cautions for removal, instal-
lation, disassembly, and reassembly are ex-
plained under this category of heading.
The alphabetical character in this category of
heading matches that of the relevant removal
steps, installation steps, disassembly steps, or
reassembly steps.
Denotes non-reusable part.
Tightening torque
CRANKSHAFT AND CYLINDER BLOCK
Removal steps
1.
Flywheel bolt
2. Adapter plate
3.
Flywheel
4. Crankshaft bushing
5.
Drive plate bolt
6.
Adapter plate
7.
Drive plate
8.
Crankshaft bushing
9.
Rear plate
10.
Bell housing cover
>>E<< 11.
Oil seal case
>>D<< 12.
Oil seal
>>A<< THRUST BEARING INSTALLATION
INSTALLATION SERVICE POINTS
AK100786AB
Grooves
Group title
AK303970
AK303794AB
6
7
8
9
10
11
12
14
13
15
16
17
18
19
20
11 ± 1 N·m
132 ± 5 N·m
25 ± 2 N·m
Apply engine oil
to all moving
parts before
installation.
5
9.0 ± 1.0 N·m
11 ± 1 N·m
→ + 90˚
25 ± 2 N·m
→ + 90˚
1
3
A
4
2
132 ± 5 N·m
GENERAL INFORMATION
ENGINE OVERHAUL
11B-4
GENERAL INFORMATION
M1113000100396
VEHICLE AND ENGINE MODELS
GENERAL SPECIFICATIONS
M1113000200638
SERVICE SPECIFICATIONS
M1113000300613
Vehicle name
Vehicle
model
Engine model
Displacement
mL
Specification
Grandis
NA4W
4G69-2
2,378
Single overhead camshaft, 16-valve
Description
Specification
Type
In-line OHV, SOHC
Number of cylinders
4
Combustion chamber
Pent roof type
Total displacement cm
3
2,378
Cylinder bore mm
87
Piston stroke mm
100
Compression ratio
9.5
Valve timing
Intake valve
Opens (BTDC)
0
° <Low speed cam A>
2
° <Low speed cam B>
20
° <High speed cam>
Closes (ABDC)
46
° <Low speed cam A>
48
° <Low speed cam B>
72
° <High speed cam>
Exhaust valve
Opens (BBDC)
54
°
Closes (ATDC)
21
°
Lubrication system
Pressure feed, full-flow filtration
Oil pump type
Involute gear type
Item
Standard value
Limit
Timing belt
Auto tensioner rod length mm
3.8
− 4.5
−
Auto-tensioner rod projection length mm
12
−
Auto-tensioner rod pushed-in amount [When pushed with a
force of 98
− 196 N] mm
1.0 or less
−
Valve clearance mm
Intake
0.11
−
Exhaust
0.20
−
Rocker arms and camshaft
SERVICE SPECIFICATIONS
ENGINE OVERHAUL
11B-5
Camshaft cam height mm
Intake
Low speed
cam A
34.41
Minimum 33.91
Low speed
cam B
37.47
Minimum 36.97
High speed
cam
37.21
Minimum 36.71
Exhaust
37.86 Minimum
37.36
Camshaft journal outside diameter mm
45
−
Cylinder head and valves
Cylinder head flatness of gasket surface mm
Less than 0.03
0.2
Cylinder head grinding limit of gasket surface mm (Total
resurfacing depth of cylinder head and cylinder block)
−
0.2
Cylinder head overall height mm
120
−
Cylinder head bolt shank length mm
−
99.4
Valve thickness of valve head
(margin) mm
Intake
1.0
Minimum 0.5
Exhaust
1.2
Minimum 0.7
Valve overall height mm
Intake
111.33
Minimum 110.83
Exhaust
113.54 Minimum
113.04
Valve stem outside diameter mm
6.0
−
Valve thickness to valve guide
clearance mm
Intake
0.02
− 0.04
0.10
Exhaust
0.04
− 0.06
0.15
Valve face angle mm
43.5
° − 44°
−
Valve spring free length mm
Intake
54.8
Minimum 53.8
Exhaust
56.1 Minimum
55.1
Valve spring load/installed height
N/mm
Intake
235/44.2
−
Exhaust
226/44.2
−
Valve spring out-of-squareness
2
° or less
4
°
Valve seat valve contact width mm
0.9
− 1.3
−
Valve guide inside diameter mm
6.0
−
Valve guide projection from cylinder head upper surface
mm
14.0
−
Valve stem projection mm
Intake
48.33
48.83
Exhaust
48.34
48.84
Oil pan and oil pump
Oil pump side clearance mm
Drive gear
0.08
− 0.14
−
Driven gear
0.06
− 0.12
−
Oil pressure at curb idle speed kPa
[oil temperature is 75 to 90
°]
78 or more
−
Piston and connecting rod
Piston outside diameter mm
87
−
Item
Standard value
Limit
REWORK DIMENSIONS
ENGINE OVERHAUL
11B-6
REWORK DIMENSIONS
M1113024300253
Piston ring side 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
0.28
− 0.43
0.8
Oil ring side rail
0.10
− 0.40
1.0
Piston pin outside diameter mm
22.0
−
Piston pin press-in load N (Room temperature)
7,350
− 17,200
−
Crankshaft pin oil clearance mm
0.02
− 0.05
0.1
Connecting rod big end side clearance mm
0.10
− 0.25
0.4
Crankshaft and cylinder block
Crankshaft end play mm
0.05
− 0.25
0.40
Crankshaft journal outside diameter mm
57.0
−
Crankshaft pin outside diameter mm
45.0
−
Crankshaft journal oil clearance mm
0.02
− 0.04
0.1
Bearing cap bolt shank length mm
−
71.1
Piston to cylinder clearance mm
0.02
− 0.04
−
Cylinder block flatness of gasket surface mm
0.05
0.1
Cylinder block grinding limit of gasket surface mm (Total
resurfacing depth of both cylinder head and cylinder block)
−
0.2
Cylinder block overall height mm
284
−
Cylinder block inside diameter mm
87.0
−
Cylindricity mm
0.01
−
Item
Standard value
Limit
Item
Standard value
Cylinder head And valves
Diameter of oversize valve seat ring hole in cylinder head
mm
Intake
0.3 oversize
35.30
− 35.33
0.6 oversize
35.60
− 35.63
Exhaust
0.3 oversize
33.30
− 33.33
0.6 oversize
33.60
− 33.63
Diameter of oversize valve guide hole in cylinder head mm
0.05 oversize
11.05
− 11.07
0.25 oversize
11.25
− 11.27
0.50 oversize
11.50
− 11.52
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