Technical data and maintenanceGas rings
Gas rings
|
First ring |
0.25 ÷ 0.40 mm |
| Rings'port |
Second ring |
0.25 ÷ 0.50 mm |
|
Oil scraper ring |
0.25 ÷ 0.50 mm |
| End play between seats and gas rings |
First ring |
- |
| Second ring |
0.020 ÷ 0.060 mm |
| Oil scraper ring |
0.030 ÷ 0.065 mm |
Piston pins
External diameter of piston pins 25.982 ÷ 25.988 mm
Cylinders' head
Head
|
Diameter of transmission tappets seats |
37.000 ÷ 37.025 mm |
|
Diameter of transmission shaft supports |
26.045 ÷ 26.070 mm |
|
Lower plan's flatness |
0.1 mm |
|
Minimum height allowed after flattening |
141.00 ± 0.15 mm |
Valves' guides
|
Intake |
14.010 ÷ 14.030 mm |
| External diameter of valves' guides |
Exhaust |
|
| Oversize by 0.05 - 0.10 - 0.25 mm |
| Internal diameter of valves'guides |
8.022 ÷ 8.040 mm |
Valves' seats
|
Intake |
36.135 ÷ 36.150 mm |
| External diameter of valve seat |
Exhaust |
35.142 ÷ 35.157 mm |
| Taper of valves'seats |
90° ± 20' |
Valves
|
Intake |
7.974 ÷ 7.992 mm |
| Diameter of the valve stem |
Exhaust |
|
| Angle of the valve head |
90° ± 20' |
| Embedding of the valve head |
0.1 ÷ 0.5 mm |
02 Maintenance
