|
Crank drive, cylinder block
Illustration
| 1. |
Main bearing journal |
| 2. |
Con-rod bearing journal |
| 3. |
Main bearing 3 |
| 4. |
Crankshaft colour code |
| 5. |
Bearing shell colour code |
| 6. |
Bearing shell identification |
|
|
Illustration
|
1
|
Bearing number
|
|
2
|
P:
|
Con-rod bearing
|
|
3
|
N:
|
Standard size
|
|
|
U:
|
Undersize
|
|
4
|
Colour code
|
|
|
G:
|
green / B: brown
|
|
5
|
H:
|
Main bearing
|
|
6
|
N:
|
Standard size
|
|
|
U:
|
Undersize
|
|
|
|
Engine
|
|
X 20 DTL, Y 20 DTL, Y 20 DTH, Y 22 DTR
|
|
Crankshaft dimensions
|
|
Ø Main bearing journal
|
Colour code
|
| |
|
1 – 5
|
|
|
|
Standard size
|
mm
|
67.966 – 67.974
|
green
|
| |
mm
|
67.974 – 67.982
|
brown
|
|
|
Undersize (0.25)
|
mm
|
67.716 – 67.724
|
green/blue
|
| |
mm
|
67.724 – 67.732
|
brown/blue
|
|
|
Undersize (0.50)
|
mm
|
67.466 – 67.474
|
green / violet
|
| |
mm
|
67.474 – 67.482
|
brown / violet
|
| |
|
Ø Con-rod bearing journal
|
|
| |
|
1 – 4
|
|
|
|
Standard size
|
mm
|
48.971 – 48.990
|
–
|
|
|
Undersize (0.25)
|
mm
|
48.721 – 48.740
|
blue
|
|
|
Undersize (0.50)
|
mm
|
48.471 – 48.490
|
purple
|
|
|
|
|
Width of main bearing
|
|
|
|
|
|
journal 3
|
|
|
|
|
|
(guide bearing)
|
|
|
|
Standard size
|
mm
|
25.950 – 26.002
|
–
|
|
|
Undersize (0.20)
|
mm
|
26.150 – 26.202
|
–
|
|
|
Undersize (0.40)
|
mm
|
26.350 – 26.402
|
–
|
|
Perm. crankshaft end play
|
mm
|
0.100 – 0.102
|
|
Perm. out-of-round
|
mm
|
0.03
|
|
Engine
|
|
X 20 DTL, Y 20 DTL, Y 20 DTH, Y 22 DTR
|
|
Crankshaft bearing
|
|
Lower crankshaft bearing shell
|
|
1.2.4.5
|
|
Colour
|
Thickness
|
coding
|
| |
|
|
|
|
| |
|
|
|
GM 174
|
|
|
Standard size
|
mm
|
brown
|
1.989 – 1.995
|
919 N
|
|
|
|
mm
|
green
|
1.995 – 2.001
|
920 N
|
|
|
Undersize (0.25)
|
mm
|
brown/blue
|
2.114 – 2.120
|
921 A
|
|
|
|
mm
|
green/blue
|
2.120 – 2.126
|
922 A
|
|
|
Undersize (0.50)
|
mm
|
brown / violet
|
2.239 – 2.245
|
923 B
|
|
|
|
mm
|
green / violet
|
2.245 – 2.251
|
924 B
|
|
|
|
|
Upper crankshaft bearing shell
|
|
|
Standard size
|
mm
|
brown
|
1.989 – 1.995
|
926 N
|
|
|
|
mm
|
green
|
1.995 – 2.001
|
927 N
|
|
|
Undersize (0.25)
|
mm
|
brown/blue
|
2.114 – 2.120
|
928 A
|
|
|
|
mm
|
green/blue
|
2.120 – 2.126
|
929 A
|
|
|
Undersize (0.50)
|
mm
|
brown / violet
|
2.239 – 2.245
|
930 B
|
|
|
|
mm
|
green / violet
|
2.245 – 2.251
|
931 B
|
|
Perm. crankshaft bearing play
|
mm
|
0.016 – 0.069
|
|
Engine
|
|
X 20 DTL, Y 20 DTL, Y 20 DTH, Y 22 DTR
|
|
Crankshaft bearings (3)
|
|
Lower crankshaft bearing shell
|
|
(guide bearing)
|
|
Colour
|
Thickness
|
coding
|
| |
|
|
|
|
| |
|
|
|
GM 174
|
|
|
Standard size
|
mm
|
brown
|
1.989 – 1.995
|
933 N
|
|
|
|
mm
|
green
|
1.995 – 2.001
|
934 N
|
|
|
Undersize (0.25)
|
mm
|
brown/blue
|
2.114 – 2.120
|
935 A
|
|
|
|
mm
|
green/blue
|
2.120 – 2.126
|
936 A
|
|
|
Undersize (0.50)
|
mm
|
brown / violet
|
2.239 – 2.245
|
937 B
|
|
|
|
mm
|
green / violet
|
2.245 – 2.251
|
938 B
|
|
|
|
|
Upper crankshaft bearing shell
|
|
|
Standard size
|
mm
|
brown
|
1.989 – 1.995
|
947 N
|
|
|
|
mm
|
green
|
1.995 – 2.001
|
948 N
|
|
|
Undersize (0.25)
|
mm
|
brown/blue
|
2.114 – 2.120
|
949 A
|
|
|
|
mm
|
green/blue
|
2.120 – 2.126
|
950 A
|
|
|
Undersize (0.50)
|
mm
|
brown / violet
|
2.239 – 2.245
|
951 B
|
|
|
|
mm
|
green / violet
|
2.245 – 2.251
|
952 B
|
|
Engine
|
|
X 20 DTL, Y 20 DTL, Y 20 DTH, Y 22 DTR
|
|
Crankshaft bearings (3)
|
|
Colour
|
Width
|
coding
|
|
(guide bearing)
|
|
|
|
|
|
|
Standard size
|
mm
|
green – brown
|
25.850 – 25.900
|
–
|
|
|
|
|
|
|
|
|
|
Undersize (0.25)
|
mm
|
brown/blue
|
26.050 – 26.100
|
–
|
|
|
|
|
green/blue
|
|
|
|
|
Undersize (0.50)
|
mm
|
brown / violet
|
26.250 – 26.300
|
–
|
|
|
|
|
green / violet
|
|
|
|
Engine
|
|
X 20 DTL, Y 20 DTH
|
|
Con-rod bearing
|
|
Lower con-rod bearing shell
|
| |
|
Colour
|
Thickness
|
coding
|
| |
|
|
|
|
| |
|
|
|
GM 272
|
|
|
Standard size
|
mm
|
–
|
1.490 – 1.500
|
954 N
|
|
|
Undersize (0.25)
|
mm
|
blue
|
1.615 – 1.625
|
955 A
|
|
|
Undersize (0.50)
|
mm
|
purple
|
1.740 – 1.750
|
115 B
|
|
|
|
|
Upper con-rod bearing shell
|
| |
|
Colour
|
Thickness
|
coding
|
| |
|
|
|
|
| |
|
|
|
GM 42
|
|
|
Standard size
|
mm
|
–
|
1.490 – 1.500
|
957 N
|
|
|
Undersize (0.25)
|
mm
|
blue
|
1.615 – 1.625
|
958 A
|
|
|
Undersize (0.50)
|
mm
|
purple
|
1.740 – 1.750
|
116 B
|
|
Perm. con-rod play
|
mm
|
0.010 – 0.061
|
|
Engine
|
|
Y 20 DTH, Y 22 DTR
|
|
Con-rod bearing
|
|
Lower con-rod bearing shell
|
| |
|
Colour
|
Thickness
|
coding
|
| |
|
|
|
|
| |
|
|
|
GM 272
|
|
|
Standard size
|
mm
|
–
|
1.490 – 1.500
|
954 N
|
|
|
Undersize (0.25)
|
mm
|
blue
|
1.615 – 1.625
|
955 A
|
|
|
Undersize (0.50)
|
mm
|
purple
|
1.740 – 1.750
|
115 B
|
|
|
|
|
Upper con-rod bearing shell
|
| |
|
Colour
|
Thickness
|
coding
|
| |
|
|
|
|
| |
|
|
|
GM 199
|
|
|
Standard size
|
mm
|
green
|
1.490 – 1.500
|
118 N
|
|
|
Undersize (0.25)
|
mm
|
blue / green
|
1.615 – 1.625
|
119 A
|
|
|
Undersize (0.50)
|
mm
|
violet / green
|
1.740 – 1.750
|
120 B
|
|
Perm. con-rod play
|
mm
|
0.010 – 0.061
|
Illustration
| 1. |
Index – identification of cylinder bore |
| 2. |
Cylinder Bore |
| 3. |
Double bevelled ring with spiral-type expander |
| 4. |
Tapered compression ring or double trapezoidal
ring |
| 5. |
Rectangular compression ring |
| 6. |
Piston diameter |
|
|
|
Engine
|
|
X 20 DTL, Y 20 DTH
|
Y 20 DTH, Y 22 DTR
|
|
Ø Cylinder bore
|
|
|
|
|
Standard size
|
|
|
|
|
|
Coefficient 8
|
mm
|
83.975 – 83.985
|
|
|
|
Index 99
|
mm
|
83.985 – 83.995
|
|
|
|
Index 00
|
mm
|
83.995 – 84.005
|
|
|
|
Index 01
|
mm
|
84.005 – 84.015
|
|
|
|
Coefficient 02
|
mm
|
84.015 – 84.025
|
|
|
Oversize
1)
|
|
|
|
|
|
Index 7 + 0.5
|
mm
|
84.465 - 84.475
|
|
Ø Piston
|
|
|
|
|
|
Standard size
|
|
|
|
|
|
|
Coefficient 8
|
mm
|
83.905 – 83.915
|
83.930 – 83.940
|
|
|
|
Index 99
|
mm
|
83.915 – 83.925
|
83.940 – 83.950
|
|
|
|
Index 00
|
mm
|
83.925 – 83.935
|
83.950 - 83.960
|
|
|
|
Index 01
|
mm
|
83.935 – 83.945
|
83.960 - 83.970
|
|
|
|
Coefficient 02
|
mm
|
83.945 – 83.955
|
83.970 - 83.980
|
|
|
Oversize
|
|
|
|
|
|
|
Index 7 + 0.5
|
mm
|
84.395 – 84.405
|
84.465 - 84.475
|
|
Piston play
|
mm
|
0.06 – 0.08
|
0.035 - 0.055
|
|
Piston projection
|
mm
|
0.40 - 0.70
|
|
Engine
|
|
X 20 DTL, Y 20 DTH, Y 20 DTH, Y 22 DTR
|
|
Piston projection
|
|
Thickness of
|
Identification of
|
| |
|
Cylinder head gasket
|
Cylinder head gasket
|
|
Dimension
|
|
|
|
|
|
0.40 – 0.50 mm
|
mm
|
1.20
|
–
|
|
|
0.51 – 0.60 mm
|
mm
|
1.30
|
1 notch
|
|
|
0.61 – 0.70 mm
|
mm
|
1.40
|
2 notches
|
|
Engine
|
|
X 20 DTL, Y 20 DTL up to engine number 17B58981
|
Y 20 DTL as of engine number 17B58982, Y 20 DTH, Y 22 DTR
|
|
Piston Rings
|
|
|
|
|
|
Rectangular compression ring
|
|
|
|
|
|
|
Height
|
mm
|
2.00
|
–
|
|
|
|
Gap
|
mm
|
0.20 – 0.45
|
–
|
|
|
|
Vertical play
|
mm
|
0.11 – 0.13
|
–
|
|
|
Double trapezoidal ring
|
|
|
|
|
|
|
Height
|
mm
|
–
|
2.5
|
|
|
|
Gap
|
mm
|
–
|
0.25 – 0.50
|
|
|
|
Vertical play
|
mm
|
–
|
0.08 – 0.12
|
|
|
Tapered compression ring
|
|
|
|
|
|
|
Height
|
mm
|
1.75
|
1.75
|
|
|
|
Gap
|
mm
|
0.25 – 0.50
|
0.25 – 0.50
|
|
|
|
Vertical play
|
mm
|
0.05 – 0.09
|
0.05 – 0.09
|
|
|
Oil scraper ring
|
|
|
|
|
|
|
Height
|
mm
|
3.00
|
3.00
|
|
|
|
Gap
|
mm
|
0.25 – 0.50
|
0.25 – 0.50
|
|
|
|
Vertical play
|
mm
|
0.03 – 0.07
|
0.03 – 0.07
|
|
Ring gap distribution
2)
|
°
|
120
|
|
Engine
|
|
X 20 DTL, Y 20 DTL, Y 20 DTH, Y 22 DTR
|
|
Piston Pins
|
|
|
|
|
Length
|
mm
|
68
|
|
|
Diameter
|
mm
|
29
|
|
|
Bearing
|
|
floating
|
|
|
Play
|
|
|
|
|
|
in piston
|
mm
|
0.005 - 0.011
|
|
|
|
in con-rod
|
mm
|
0.022 - 0.028
|
1 ) After re-boring the old index must be
invalidated and the new oversizing index must be embossed.
2 ) Arrange gap of upper oil scraper ring 25 to 50
mm offset to the left and gap of the lower ring 25 to 50 mm offset
to the right relative to the gap of the lower intermediate ring.
|
