Magnesium Crankcase, early 911 (F and G Series, 1968–1976)
Porsche Classic reissued the magnesium crankcase in 2023 for 2.0, 2.2, 2.4 and 2.7 litre engines — ending decades of welding cracks or hunting secondhand cases.
Engine InternalsIn productionconfidence: high
Manufacturing
| Manufacturer | Porsche Classic |
|---|---|
| Origin | 🇩🇪 Germany Manufactured here Porsche Classic reissue, produced in Germany. |
| Process | Cast |
| Additively manufactured | No |
| Material | Magnesium Alloy |
| Notes | Porsche moved from aluminium to magnesium in 1968 for the weight, then away again — magnesium cases crack and corrode, and the 3.0 SC returned to aluminium. Reissuing the original material is a restoration-authenticity decision, not an engineering improvement. |
Fitment
| 901 | All models (1968–1973) 2.0, 2.2 and 2.4 litre. |
|---|---|
| g-series | All models (1974–1976) 2.7 litre. |
Sources
- New magnesium crankcases for early 911 — Porsche Newsroom, accessed 2026-08-17
- Porsche's New Magnesium Engine Parts For Vintage 911s — The Autopian, accessed 2026-08-17