| Camshaft bearing bore diameters: | |
| – nominal | 30.500 - 30.525 mm |
| – repair | 30.575 – 30.600 mm |
| Pusher socket hole diameters: | |
| – nominal | 35.000 – 35.030 mm |
| – repair | 35.500 - 35.530 mm |
| Valve guide bore diameters: | |
| – nominal | 8.000 – 8.035 mm |
| – repair | 8.263 - 8.288 mm |
Cylinder head gasket
The thickness of the cylinder head gasket is selected depending on the protrusion of the pistons above the upper plane of the cylinder block, and the value of the most protruding piston is taken into account. The gasket thickness is identified by the corresponding designation:
- for cylinder blocks with nominal cylinder diameters: the gasket has cutouts;
- for cylinder blocks with overhaul cylinder diameters (+0.5 or +1.0): the gasket has a hole.
Installation method: Cylinder head gasket installed by inscription "OBEN-TOP" towards the head (the inscription must be visible after the gasket is installed on the cylinder block).
Engine 1.6 dm3
Piston protrusion (mm) | Cylinder Head Gasket Designation No. of Teeth/Cutouts |
0,430 – 0,620 | 1 |
0,621 – 0,680 | 2 |
0,681 – 0,740 | 3 |
0,741 – 0,800 | 4 |
0,801 – 0,806 | 5 |
Engine 1.8 dm3
Piston protrusion (mm) | Designation of the head gasket on the cylinder block with cylinder diameters | |
Rated | Repair | |
0,500 – 0,680 | 2 cutouts | 2 holes |
0,681 – 0,740 | 3 cutouts | 3 holes |
0,741 – 0,840 | 4 cutouts | 4 holes |
Combustion chambers
Swirl combustion chambers, steel, inserted into the cylinder head and fixed with a steel ball.
| Camera type | Vortex Ricardo Comet Mark V |
| The protrusion of the combustion chambers from the lower plane of the cylinder head: | |
| – engine 1.6 l | 0.001 - 0.042 mm |
| – engine 1.8 l | 0 - 0.061 mm |
Valve seats
The valve seats are pressed into the cylinder head.
Valve springs
The springs are the same for both intake and exhaust valves.
Free length: 43 mm.
Valves
Valves mounted in the cylinder head are actuated by camshaft lobes through cylindrical tappets.
Valve sizes
Kind of size | Valve | |
Inlet | High school graduation | |
| Engine 1.6 dm3 | ||
| Rod diameter: | ||
| - nominal | 7,980 | 7,960 |
| – 1 repair (mm) | 8,243 | 8,223 |
| – 2 repair (mm) | 8,443 | 8,423 |
| Plate diameter (mm) | 34,900 | 31,000 |
| Valve length (mm) | 107,300 | 108,600 |
| Engine 1.8 dm3 | ||
| Rod diameter: | ||
| - nominal | 7,970 – 7,995 | 7,945 – 7,960 |
| – 1 repair (mm) | 8,170 – 8,195 | 8,145 – 8,160 |
| – 2 repair (mm) | 8,370 – 8,395 | 8,345 – 8,360 |
| Plate diameter (mm) | 36,40 – 36,60 | 31,90 – 32,10 |
| Valve length (mm) | 107,05 – 107,15 | 109,15 – 109,25 |
Valve clearance (cold)
Valve clearance adjustment | Selection of the thickness of the adjusting plates located in the recess of the pushers |
| Adjustment plate thickness range | 3.00 - 4.75 mm |
| The difference in the thickness of the adjusting plates | 0.05 mm |
| Engine 1.6 dm3 | |
| intake valve clearance | 0.35±0.065 mm |
| Exhaust valve clearance | 0.50±0.065 mm |
| Engine 1.8 dm3 | |
| intake valve clearance | 0.30±0.05mm |
| Exhaust valve clearance | 0.50±0.05mm |
Pushers
| Outside diameter: | |
| - nominal | 34.950 - 34.975 mm |
| - repair | 35.450 - 35.475 mm |
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