Mitsubishi Heavy Industries L2, Service Manual

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40 / 155 Service Manual Mitsubishi L-Series diesel engines
Version 08/2004
ENGLISH
GENERAL ENGINE MAIN PARTS
ENGINE MAIN PARTS
7 GENERAL
7.1 Specifications
Item
Model
L2 L3
CYLINDER
HEAD
Material Special cast iron
Combustion chamber type Swirl chamber
Material of chamber Heat-resisting steel (press-fitted in cylinder head)
Type of intake and exhaust ports Cross-flow type
VALVE
SEATS
Material
Heat-resisting steel (3600 min
-1
specification engines)
Special cast iron (3000 min
-1
or less engines)
VALVES
Face angle 45°
Identification mark inlet IN
Identification mark exhaust EX
VALVE
SPRINGS
Type Uniformly pitched, single
Identification mark White paint atop (common to inlet and exhaust valves)
CYLINDER
HEAD GASKET
Material Carbon sheet (Graphoil)
CYLINDER
HEAD BOLTS
Material Special steel
Size x number bolts
M10 x 6 M10 x 8
M8 x 2 M8 x 3
CAMSHAFT
Material valve cam
Carbon steel
Material pump cam
Arrangement – drive Side – gear driven
CYLINDER
BLOCK
Cylinder bore mm [in.]
L2A L2C L2E L3A L3C L3E
65
[2.5591]
70
[2.7559]
76
[2.9921]
65
[2.5591]
70
[2.7559]
76
[2.9921]
Cylinder liner type Monoblock type
Water jacket type A, C: Full jacket, E: “Siamese” type
CRANKSHAFT
Material Carbon Steel
Surface treatment Hardening (Induction)
Main journal dia. x Crankpin dia.
mm [in.]
43 x 40 [1.6929 x 1.5748]
PISTON
Type “Autothermic”
Joint to connecting rod Semi-floating
Cooling Oil jet
Table 17 Specifications