| Clue | Source | Date |
|---|---|---|
| Crankcase reservoirs | LA Times Daily | 15 Nov 2019 |
| Crankcase reservoirs | The Washington Post | 15 Nov 2019 |
| Crankcase attachments | New York Times | 12 Sep 2016 |
| Crankcase attachments | ||
| Crankcase parts | Newsday | 16 Dec 2015 |
| Crankcase parts | ||
| Car collectors? | ||
| Crankcase components | ||
| Crankcase components | ||
| Crankcases' bases | ||
| Bottoms of crankcases | ||
| Crankcase bases | ||
| Car reservoirs |