Crankcase
| Measuring Point | Installation Size with Tolerances |
Clearance (+) or Preload (-) |
Wear Limit | ||
| mm | from | to | mm | ||
| Crankcase bore for main bearings | |||||
| Bearings 1-8 | 62.000-62.019 | ||||
| Crankcase bore for intermediate shaft: | |||||
| (Die-cast crankcase to Jan-9-68) Bearing 1 Bearing 2 |
29.800-29.821 24.000-24.021 |
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| (Pressure-cast crankcase from Jan 9 -68) Bearing 1 (bearing insert) Bearing 2 |
27.500-27.521 26.500-26.521 |
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| Spring for pressure relief and safety valves: | |||||
| Free length | 70.00 mm | ||||
| Spring pressure at 52 mm | 10.6 kp | ||||
| Spring pressure at 46 mm | 14.1 kp | ||||
| Spring wire diameter | 1.8 mm | ||||
| Block length | 33.3 mm | ||||
From Engine #901 283, the 3.5 mm thick aluminum ring is discontinued.
The bore for the pressure relief valve has been changed accordingly.