| Cylinder head | |
| Maximum permissible non-flatness of the lower 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 | |
| Height of valve guide bushing in cylinder head |
80.85 – 81.25 mm
|
| Valve stem diameter: | |
| – inlet valve: | |
| • nominal |
6.998 – 7.012 mm
|
| • 1st size up (0.075 mm – K1) |
7.073 – 7.087 mm
|
| • 2nd larger size (0.150 mm – K2) |
7.148 – 7.162 mm
|
| • 3rd size increased (0.250 mm – A) |
7.248 – 7.262 mm
|
| – exhaust valve: | |
| • nominal |
6.998 – 7.012 mm
|
| • 1st size up (0.075 mm – K1) |
77.053 – 7.067 mm
|
| • 2nd larger size (0.150 mm – K2) |
7.128 – 7.142 mm
|
| • 3rd size increased (0.250 mm – A) |
7.228 – 7.262 mm
|
| Valve stem outlet |
less than 0.03 mm
|
| Valve guide bore diameter: | |
| - nominal |
7.030 – 7.050 mm
|
| – 1st increased size (0.075 mm – K1) |
7.105 – 7.125 mm
|
| – 2nd larger size (0.150 mm – K2) |
7.180 – 7.200 mm
|
| – 3rd larger size (0.250 mm – A) |
7.280 – 7.300 mm
|
| Clearance between valve stem and 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 height |
13.75 – 14.35 mm
|
| Valve Plate Diameter: | |
| - inlet valve |
38 mm
|
| - exhaust valve |
31mm
|
| Cylinder block | |
|
Maximum permissible non-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
|
| – increased size (0.5 mm) |
79.465 – 79.475 mm
|
| – maximum cylinder ovality |
0.013 mm
|
| – maximum cylinder taper |
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
|
| – larger size (0.5 mm) – size group 7 + 0.5 |
79.445 – 79.455 mm
|
| Piston clearance in cylinder |
0.02±0.01 mm
|
| Piston ring lock clearances (installed in the hole): | |
| - upper and lower sealing rings |
0.3 – 0.5 mm
|
| - oil scraper ring |
0.4 – 1.4 mm
|
| Piston ring thickness: | |
| - upper sealing ring |
1.2 mm
|
| - lower sealing ring |
1.5 mm
|
| - oil scraper ring |
3.0 mm
|
| Piston ring clearance in the piston |
N/ A
|
| Piston pins | |
| Diameter |
18 mm
|
| Length |
55 mm
|
| Piston pin clearance in piston |
0.009 – 0.012 mm
|
| Connecting rod | |
| Lower connecting rod end side clearance |
0.07 – 0.24 mm
|
| Crankshaft | |
| Axial play |
0.1 – 0.2 mm
|
| Main journal diameters: | |
| – 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 journal 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
|
| Main bearing working clearance |
0.017 – 0.047 mm
|
| Operating clearance of the lower connecting rod bearing |
0.019 – 0.071 mm
|
(Original source on the website: opelbook)
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