| Cylinder head | |
| Maximum permissible non-flatness of the lower surface of the head cylinder block |
0.1 mm
|
| Cylinder head height: | |
| - standard |
131.45 – 131.55 mm
|
| - minimum |
131.25 mm
|
| Valve seat width: | |
| - standard |
1.2 to 1.5 mm
|
| - the limit |
2.0 mm
|
| Vortex chamber protrusion |
0.001 – 0.030 mm
|
| Valve recess in cylinder head |
0.5 – 1.0 mm
|
| Piston pins | |
| Diameter |
27 mm
|
| Length |
60 mm
|
| Piston pin clearance in piston |
0.002 – 0.012 mm
|
| Piston pin clearance in connecting rod |
0.008 – 0.050 mm
|
| Valves | |
| Valve stem diameter: | |
| - inlet valve |
6.959 – 6.977 mm
|
| - exhaust valve |
6.960 – 6.978 mm
|
| Valve guide bore diameter |
7.000 – 7.015 mm
|
| Clearance between valve stem and guide: | |
| – inlet valve: | |
| • standard |
0.023 – 0.056 mm
|
| • ultimate |
0.080 mm
|
| – exhaust valve: | |
| • standard |
0.030 to 0.063 mm
|
| • ultimate |
0.095 mm
|
| Valve length: | |
| - inlet valve |
104.05 mm
|
| - exhaust valve |
104.00 mm
|
| Valve Plate Diameter: | |
| - inlet valve |
34.6 mm
|
| - exhaust valve |
30.6 mm
|
| Cylinder block | |
| Engine cylinder diameter: | |
| – size group A |
79.000 – 79.009 mm
|
| – size group B |
79.010 – 79.019 mm
|
| – size group C |
79.020 – 79.029 mm
|
| Maximum cylinder ovality |
0.015 mm
|
| Maximum cylinder taper |
0.015 mm
|
| Main bearing diameter (without inserts): | |
| – size group 1 |
55.992 – 56.000 mm
|
| – size group 2 |
55.984 – 55.992 mm
|
| – size group 3 |
55.976 – 55.984 mm
|
| Pistons and rings | |
| Piston diameter: | |
| – size group A |
78.975 – 78.984 mm
|
| – size group B |
78.965 – 78.994 mm
|
| – size group C |
78.995 – 79.004 mm
|
| Piston clearance in cylinder |
0.016 – 0.034 mm
|
| Piston ring lock clearances (installed in the hole): | |
| - upper sealing ring |
0.25 – 0.80 mm
|
| - lower sealing ring |
0.20 – 0.80 mm
|
| - oil scraper ring |
0.20 – 0.80 mm
|
| Piston ring clearance in the piston: | |
| - upper sealing ring |
0.12 – 0.18 mm
|
| - lower sealing ring |
0.05 – 0.15 mm
|
| - oil scraper ring |
0.02 – 0.15 mm
|
| Piston ring thickness: | |
| - upper sealing ring |
2.0 mm
|
| - lower sealing ring |
2.0 mm
|
| - oil scraper ring |
3.0 mm
|
| Connecting rod | |
| Lower connecting rod end side clearance |
0.20 – 0.40 mm
|
| Maximum allowable weight difference between connecting rods |
4 g
|
| Crankshaft | |
| Axial play |
0.06 – 0.30 mm
|
| Main journal diameters: | |
| – 1st size group |
51.928 – 51.938 mm
|
| – 2nd size group |
51.918 – 51.928 mm
|
| Main bearing working clearance |
0.030 – 0.080 mm
|
| Operating clearance of the lower connecting rod bearing |
0.025 – 0.100 mm
|
[Article published on the website: www.opelbook.ru]
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