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4 DLT ENGINE
VALVE SEAT DIMENSIONS
INLET EXHAUST
Valve seat angle (
ø
)
45
0
-15
'
45
0
-15
'
Valve seat dia ‘F’ in mm 36.9
31.0
cylinder head
Distance ‘G’ between mm 1.850
1.950
cylinder head mating
surface with crank
case to valve seat in
cylinder head
Maximum run out of
mm 0.040
0.040
valve seat in cylinder
head with respect to
valve guide axis
VALVE SEAT INSERTS
Valve seat insert & bore dia in cylinder head
Stage
Valve seat
Valve seat
insert bore in insert out
cylinder head side diameter
mm
mm
INLET
Standard
39.900/39.925 40.080/40.105
Standard 1
40.200/40.225 40.380/40.405
EXHAUST
Standard
33.950/33.975 34.080/34.105
Standard1
34.250/34.275 34.380/34.405
Depth of bore Thickness of
in cylinder
valve seat
head for valve
insert
seat insert
mm
mm
INLET
9.0/9.2
7.3/7.5
EXHAUST
9.0/9.2
7.3/7.5
VALVE TIMING
Inlet opens
-
27
0
B.T.D.C.
Inlet closes
-
49
0
A.B.D.C.
Exhaust opens
-
72
0
B.B.D.C.
Exhaust closes
-
23
0
A.T.D.C.
Fuel injection
-
Refer the FIP
timing setting
procedure
TAPPET & TAPPET BORE DIMENSIONS
Out side Diameter Tappet bore in
of tappet
cylinder head
mm
mm
Standard 35.450/35.466 35.500/35.525
Standard I
35.650/35.666 35.700/35.725
Diametral clearance of
tappets in cyl. head bores
0.034 to 0.075 mm
CRANKSHAFT
Stage
Crank case main Crank shaft
bearing bore main bearing
diameter with
journal
bearing shell
diameter
mm
mm
Standard
60.040/60.060 59.980/60.000
Standard1
59.940/59.960 59.880/59. 900
Repair 1
59.740/59.760 59.680/59.700
Repair 2
59.440/59.46 59.380/59.400
Stage
Connecting rod big Crank pin
end bore diameter
journal
with bearing shell
diameter
mm
mm
Standard
50.035/50.055 49.995/49.98
Standard1
49.935/49.955 49.88/49.895
Repair 1
49.735/49.755 49.68/49.695
Repair 2
49.435/49.455 49.38/49.395
Stage
Width of 4th main
bearing journal
mm
Standard
27.000/27.052
Standard1
27.100/27.152
Repair 1
27.200/27.252
Thickness of 4th main
2.720, 2.670,
bearing thrust washers
2.620,
2.570, 2.520 mm
End play of crank shaft
0.070/0.252 mm
Fillet radius of crank pin journals 1.750/2.250 mm
bearing journals
Fillet radius of crank pin journals 1.750/2.250 mm
Width 1st, 2nd, 3rd and 5th 27.000/27.750 mm
main bearing journals
Width crank pin journals
24.500/24.700 mm
Maximum permissible taper
0.005 mm
and ovality of main bearing journals