Lubrication · Engine and Clutch
| System | Engine and Clutch |
| Subsystem | Lubrication |
| Assembly | Crankcase |
| Thread | M18x1.5 |
| Years | 1972–1981 |
| Vehicles | 911SC, 911T/E/S |
| Confidence | Factory Verified |
Source: Porsche 911 Workshop Manual, Section 0.2-5/3 (Tightening Torques for Engine)