Technical data and maintenanceMain bearings
Main bearings
|
Class A |
1.836 ÷ 1.840 mm |
| Thickness of the main bearings |
Class B |
1.839 ÷ 1.843 mm |
| Class C |
1.842 ÷ 1.846 mm |
| Undersize by 0.127 mm |
Oil Pump
|
Play between pump bay and driven gear |
0.080 ÷ 0.186 mm |
| Play between pump cover face and gears |
0.025 ÷ 0.070 mm |
| Spring of oil pressure relief valve |
Height |
35 mm |
| Check load |
11.73 ÷ 12.51 daN |
| Engine oil pressure |
At slow running |
0.6 ÷ 0.7 bar |
| At 4000 revs/1' |
2.5 ÷ 3.0 bar |
CONNECTING ROD - PISTON GROUP
Connecting rods
|
Inner diameter of the connecting rods bushings (line-boring) |
26.006 ÷ 26.012 mm |
| Diameter of the connecting rods heads |
53.883 ÷ 53.923 mm |
| Weight difference between the connecting rods |
± 2.5 g |
Connecting rods’ bearings
|
Class A |
1.527 ÷ 1.531 mm |
| Thickness of the connecting rods’ bearings |
Class B |
1.530 ÷ 1.534 mm |
| Class C |
1.533 ÷ 1.537 mm |
Pistons
|
Class A |
81.783 ÷ 81.797 mm |
| External diameter of pistons |
Class B |
81.793 ÷ 81.807 mm |
| Class C |
81.803 ÷ 81.817 mm |
| Internal diameter of the bushings in the pistons |
25.999 ÷ 26.004 mm |
| Weight difference among pistons |
± 5 g |
02 Maintenance
