cylinder head | |
Maximum allowable flatness of the bottom surface of the head cylinder block |
0.05 mm
|
Cylinder head height |
95.90 – 96.10 mm
|
Valve seat width: | |
- inlet valve |
1.3 - 1.5 mm
|
- Exhaust valve |
1.6 - 1.8 mm
|
valves | |
Valve guide height in cylinder head |
80.85 – 81.25 mm
|
Valve stem diameter: | |
- inlet valve: | |
nominal |
6.998 – 7.012 mm
|
1st enlarged size (0.075 mm - K1) |
7.073 – 7.087 mm
|
2nd enlarged size (0.150 mm - K2) |
7.148 – 7.162 mm
|
3rd enlarged size (0.250 mm - A) |
7.248 – 7.262 mm
|
- Exhaust valve: | |
nominal |
6.998 – 7.012 mm
|
1st enlarged size (0.075 mm - K1) |
77.053 – 7.067 mm
|
2nd enlarged size (0.150 mm - K2) |
7.128 – 7.142 mm
|
3rd enlarged size (0.250 mm - A) |
7.228 – 7.262 mm
|
Valve stem outlet |
less than 0.03mm
|
Valve guide bore diameter: | |
- nominal |
7.030 – 7.050 mm
|
– 1st enlarged size (0.075 mm - K1) |
7.105 – 7.125 mm
|
– 2nd enlarged size (0.150 mm - K2) |
7.180 – 7.200 mm
|
– 3rd enlarged size (0.250 mm - A) |
7.280 – 7.300 mm
|
Clearance between stem and valve guide: | |
- inlet valve |
0.018 – 0.052 mm
|
- Exhaust valve |
0.038 – 0.072 mm
|
Valve length: | |
- new |
101.5 mm
|
– minimum |
101.1 mm
|
Valve stem lift |
13.75 – 14.35 mm
|
Valve disc diameter: | |
- inlet valve |
38 mm
|
- Exhaust valve |
31mm
|
Cylinder block | |
Maximum allowable out-of-flatness |
0.05 mm
|
Cylinder diameters: | |
– standard: | |
size group 6 |
78.955 – 78.965 mm
|
size group 7 |
78.965 – 78.975 mm
|
size group 8 |
78.975 – 78.985 mm
|
- enlarged size (0.5 mm) |
79.465 – 79.475 mm
|
– maximum ovality of the cylinder |
0.013 mm
|
– maximum taper of the cylinder |
0.013 mm
|
Pistons and rings | |
Piston diameter: | |
– standard: | |
size group 6 |
78.935 – 78.945 mm
|
size group 7 |
78.945 – 78.955 mm
|
size group 8 |
78.955 – 78.965 mm
|
- enlarged size (0.5 mm) – size group 7 + 0.5 |
79.445 – 79.455 mm
|
Piston clearance in cylinder |
0.02±0.01mm
|
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 |
3.0mm
|
Piston ring clearance in the piston |
N/ A
|
piston pins | |
Diameter |
18 mm
|
Length |
55 mm
|
Piston pin clearance in the piston |
0.009 – 0.012 mm
|
connecting rod | |
Lateral clearance of the lower head of the connecting rod |
0.07 – 0.24 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 |
42.971 – 42.987 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
|
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