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4 DLT ENGINE
Maximum permissible
0.005 mm
taper and ovality of
con. rod small end
bush inside dia
Stage
Connecting rod big Crank pin
end bore diameter
journal
with bearing shell
diameter
mm
mm
Standard
50.02/50.04
49.98/49. 995
Standard1
49.92/49.94
49.88/49. 895
Repair 1
49.72/49.74
49.68/49.695
Repair 2
49.42/49.44
49.38/49. 395
Pre-tension of connecting rod 0.060/0.120 mm
big end bearing shells
Maximum permissible
5.000 gm
difference in weight of
connecting rods in one engine
Connecting rod big end axial play 0.100/0.400 mm
Connecting rod big end clearance 0.04 to 0.076mm
Small end clearance
0.007 to 0.025 mm
PRECOMBUSTION CHAMBER
Pre-combustion chamber
32.043/32.073 mm
collar out side diameter
Pre-combustion chamber
32.000/31.975 mm
collar bore in cylinder head
Height of pre-combustion
4.020/4.030 mm
chamber collar
Height of pre-combustion
4.000/4.020 mm
chamber collar bore in
cylinder head
Projection of pre-combustion 0.000/0.030 mm
chamber above cylinder head
mating surface with crank case
INJECTION NOZZLE
Nozzle opening pressure (bar)
LUCAS
MICO
New
143 to 152
135 to 140
Old
At least 140
At least 132
Maximum permissible variation
in injection nozzle pressure
LUCAS - 140 - 150 bar & MICO - 132 - 143 bar
OIL PUMP (dimensions)
Maximum distance from drive
86.3 mm
gear face to sprocket face.
Distance between drive gear
0.1/0.2 mm
and drive shaft end
Axial play of assembly drive shaft
0.04/0.08 mm
Backlash between oil
0.15/0.25 mm
pump gears
Bore diameter in oil pump
12.000/12.010 mm
housing for drive gear shaft
Bore diameter of sprocket gear 11.950/11.960 mm
Bore diameter of drive gear
11.945/11.960 mm
Shaft diameter of drive gear
11.975/11.985 mm
Shaft diameter of driven gear 11.925/11.935 mm
Bore diameter for driven gear 11.900/11.910 mm
shaft in housing
Oil Pump Pressure Relief Valve
- Opening Pressure
7 + 0.5 bar