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4 DLT ENGINE
Maximum permissible
0.005 mm
taper of crank pin
Maximum permissible ovality
0.050 mm
of crank pin
Maximum permissible run out
0.1 mm
of 2nd, 3rd and 4th main
bearing journals when
supported at 1st and 5th
main bearing journals
Maximum permissible out
0.010 mm
of parallelism between
crank pin and main bearing
journal axis
Pretension of main
0.067/0.134 mm
bearing shells
Hardness of crank shaft
main bearing and crank
pin journals
53 to 59 HRC
Main bearing parent bore dia 63.720/63.739 mm
Maximum permissible
0.010 mm
taper of main bearing
parent bore
Maximum permissible ovality
0.030 mm
of main bearing parent bore
Main bearing clearance
0.04 to 0.08 mm
CAMSHAFT
Camshaft journal & bearing bore dimensions:
Stage Camshaft bearing Camshaft bearing
journal bore journal diameter
diameter in cylinder head
mm
mm
Standard 28.000/28.021 27. 937/27.950
Standard1 27.900/27.921 27.837/27.850
Bore dia in 1st
50.000/50.025
& 5th cap for
front & rear oil
seals
Maximum permissible
0.025 mm
run out of cam shaft
bearing journal
Maximum permissible
0.080 - 0.150 mm
axial play of cam
shaft in installed
condition
Camshaft bearing
0.03 to 0.064 mm
clearance
Hardness of cam lobes
57 - 62 HRC
CONNECTING ROD (Dimensions)
Connecting rod small end
Stage
parent bore
bush outside
diameter
diameter
mm
mm
Standard 31.00/31.025
31.038/31.114
Standard1 31.200/31.225 31.238/31.314
Maximum permissible taper
0.010 mm
and ovality of connecting
rod small end parent bore
Connecting rod small end
28.020/28.033 mm
bush inside diameter (to be
finished after installation)
(Piston pin oiled has thumb
push fit in small end bush)
Maximum permissible
0.050 mm
out of parallelism (bend)
between connecting rod
small end and big end
parent bores
Center to center distance 145.000/145.040 mm
between connecting rod
small end and big end
parent bores
Maximum permissible
0.050 mm
twist of connecting rod
measured at a distance
of 50 mm from centre
line of con-rod
Connecting rod big
53.690/53.709 mm
end parent bore diameter
Maximum permissible taper
0.010 mm
and ovality of connecting rod
big end parent bore