cylinder head | |
Maximum allowable flatness of the bottom surface of the head cylinder block |
0.05mm
|
Cylinder head height |
135 mm
|
Valve seat width: | |
- inlet valve |
1.0 - 1.4 mm
|
- Exhaust valve |
1.4 - 1.8 mm
|
piston pins | |
Diameter |
18 mm
|
Length |
55 mm
|
Piston pin clearance in the piston |
0.007 – 0.010 mm
|
Crankshaft | |
Axial play |
0.1 – 0.2 mm
|
Diameters of main journals: | |
- nominal size |
54.980 – 54.997 mm
|
- 1st repair size - 0.25 |
54.730 – 54.747 mm
|
– 2nd repair size – 0.50 |
54.482 – 54.495 mm
|
Connecting rod diameters: | |
- nominal size |
42.987 – 42.971 mm
|
- 1st repair size - 0.25 |
42.721 – 42.737 mm
|
– 2nd repair size – 0.50 |
42.471 – 42.487 mm
|
Maximum ovality |
0.04 mm
|
Maximum taper |
N/ A
|
Operating clearance of the main bearing |
0.017 – 0.047 mm
|
Connecting Rod Bearing Working Clearance |
0.019 – 0.071 mm
|
Cylinder block | |
Maximum allowable out-of-flatness |
0.05mm
|
Cylinder diameters: | |
– standard: | |
size group 5 |
78.945 – 78.955 mm
|
size group 6 |
78.955 – 78.965 mm
|
size group 7 |
78.965 – 78.975 mm
|
size group 8 |
78.975 – 78.985 mm
|
size group 99 |
78.985 – 78.995 mm
|
size group 00 |
78.995 – 79.005 mm
|
size group 01 |
79.005 – 79.015 mm
|
size group 02 |
79.015 – 79.025 mm
|
size group 03 |
79.025 – 79.035 mm
|
size group 04 |
79.035 – 79.045 mm
|
size group 05 |
79.045 – 79.055 mm
|
size group 06 |
79.055 – 79.065 mm
|
size group 07 |
79.065 – 79.075 mm
|
size group 08 |
79.075 – 79.085 mm
|
size group 09 |
79.085 – 79.095 mm
|
size group 1 |
79.095 – 79.105 mm
|
- enlarged size (0.5 mm) |
79.465 – 79.475 mm
|
Maximum ovality and taper of engine cylinder diameter |
0.013 mm
|
Pistons and rings | |
Piston diameter: | |
– standard: | |
size group 5 |
78.915 – 78.955 mm
|
size group 6 |
78.925 – 78.935 mm
|
size group 7 |
78.935 – 78.945 mm
|
size group 8 |
78.945 – 78.955 mm
|
size group 99 |
78.955 – 78.965 mm
|
size group 00 |
78.965 – 78.075 mm
|
size group 01 |
78.075 – 78.085 mm
|
size group 02 |
78.085 – 78.095 mm
|
size group 03 |
78.095 – 79.005 mm
|
size group 04 |
79.005 – 79.015 mm
|
size group 05 |
79.015 – 79.025 mm
|
size group 06 |
79.025 – 79.035 mm
|
size group 07 |
79.035 – 79.045 mm
|
size group 08 |
79.045 – 79.055 mm
|
size group 09 |
79.055 – 79.065 mm
|
size group 1 |
79.065 – 79.075 mm
|
- enlarged size (0.5 mm) – size group 7 + 0.5 |
79.435 – 79.445 mm
|
Piston clearance in cylinder |
0.02 - 0.04 mm
|
Piston ring gaps (installed in a hole): | |
- top and bottom sealing rings |
0.3 – 0.5 mm
|
- oil scraper ring |
0.4 – 1.4 mm
|
Piston ring thickness: | |
– top sealing ring |
1.2mm
|
– lower sealing ring |
1.5mm
|
- oil scraper ring |
2.5mm
|
connecting rod | |
Lateral clearance of the lower head of the connecting rod |
0.11 - 0.24 mm
|
valves | |
Valve guide height in cylinder head |
10.70 – 11.00 mm
|
Valve stem diameter: | |
- inlet valve: | |
nominal (K) |
5.995 to 5.970 mm
|
1st enlarged size (0.075 mm - K1) |
6.030 to 6.045 mm
|
2nd enlarged size (0.150 mm - K2) |
6.150 to 6.165 mm
|
- Exhaust valve: | |
nominal (K) |
5.935 to 5.950 mm
|
1st enlarged size (0.075 mm - K1) |
6.010 to 6.025 mm
|
2nd enlarged size (0.150 mm - K2) |
6.085 to 6.100 mm
|
Valve stem outlet |
less than 0.03mm
|
Valve guide bore diameter: | |
- nominal (K) |
from 6.000 to 6.012 mm
|
– 1st enlarged size (0.075 mm - K1) |
6.075 to 6.090 mm
|
– 2nd enlarged size (0.150 mm - K2) |
6.150 to 6.165 mm
|
Clearance between stem and valve guide |
N/ A
|
Valve length: | |
- inlet valve |
103.1 mm
|
- Exhaust valve |
102.2 mm
|
Valve disc diameter: | |
- inlet valve |
31.0 mm
|
- Exhaust valve |
27.5mm
|
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