| The diameter of the camshaft bearings, counting from the drive side, mm: | |
| - first | 44,783 – 44,803 |
| - second | 45,033 – 45,058 |
| - third | 45,283 – 45,308 |
| - fourth | 45,533 – 45,558 |
| - fifth | 45,783 – 45,808 |
Cylinder head gasket
The gasket is installed on the engine block with a label "Thor" up.
Designation:
- 81 SH-6051-N2D or 81 SM-6051-N3D for 1.1 dm engines3;
- 81 SH-6051-R2D or 81 SM-6051-R3D for 1.3, 1.4 and 1.6 dm engines3.
Valve guides
Valve guides made of special cast iron are pressed into the cylinder head.
| The inner diameter of the guide sleeve of the intake and exhaust valves, mm: | |
| – standard | 8,063 – 8,094 |
| – enlarged by 0.2 mm | 8,263 – 8,294 |
| – enlarged by 0.4 mm | 8,463 – 8,494 |
Valves
The working clearance of the valves is compensated by hydraulic tappets.
| Valve dimensions, mm | |
| Inlet valve: | |
| - length: | |
| engines with a displacement of 1.1 dm3 | 135,74 – 136,20 |
| engines with a displacement of 1.3 and 1.6 dm3 | 134,54 – 135,00 |
| - plate diameter: | |
| engines with a displacement of 1.1 dm3 | 37,9 – 38,1 |
| engines with a displacement of 1.3 and 1.6 dm3 | 41,9 – 42,1 |
| – rod diameter: | |
| nominal | 8,025 – 8,043 |
| enlarged by 0.2 mm | 8,225 – 8,243 |
| enlarged by 0.4 mm | 8,425 – 8,443 |
| – gap between the valve stem and the guide sleeve | 0.020 - 0.063 mm |
| – valve lift, mm: | |
| engines with a displacement of 1.1 dm3 | 9,56 |
| engines with a displacement of 1.3 and 1.6 dm3 | 10,09 |
| Exhaust valve: | |
| - length: | |
| engines with a displacement of 1.1 dm3 | 132,62 – 133,08 |
| engines with a displacement of 1.3 dm3 | 131,17 – 131,63 |
| engines with a displacement of 1.6 dm3 | 131,57 – 132,03 |
| - plate diameter: | |
| engines with a displacement of 1.1 dm3 | 32,1 – 32,3 |
| engines with a displacement of 1.3 dm3 | 33,9 – 34,1 |
| engines with a displacement of 1.6 dm3 | 36,9 – 37,1 |
| – rod diameter: | |
| nominal | 7,999 – 8,017 |
| enlarged by 0.2 mm | 8,199 – 8,217 |
| enlarged by 0.4 mm | 8,399 – 8,417 |
| – gap between the valve stem and the guide sleeve | 0.046 - 0.089 mm |
| – valve lift, mm: | |
| engines with a displacement of 1.1 dm3 | 9,52 |
| engines with a displacement of 1.3 and 1.6 dm3 | 10,06 |
Valve seats
| Inlet and outlet valve seat width | 1.75 - 2.32 mm |
| Seat Angle | 450 |
| Top cone angle | 180 |
| Lower Cone Angle: | |
| – engines with a displacement of 1.1 dm3 | 80/ 700 |
| – engines with a displacement of 1.3 and 1.6 dm3 | 77/ 700 |
Valve springs
The springs are the same for intake and intake valves.
| Spring free length | 47.2 mm |
| The length of the compressed spring corresponding to the open valve | 27.7mm |
| The length of the compressed spring corresponding to the closed valve | 37.084 mm |
| The force of compression of the spring corresponding to the open valve | 853 - 952 N |
| Force of compression of the spring corresponding to the closed valve | 401 - 441 N |
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