| Year | 2019 |
| Date | 13-Sep |
| Volume | 223 |
| Issue | 4,621 |
| Page | 436 |
| Category | Internal Combustion |
| Part | 2 |
| Title | FOCAS Oil Pump |
| Author | Peter Worden |
| Notes | Concludes his occasional series describing the building of his FOCAS engine. Gears, gear cover, pressure release valve |