From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Diagram of the combustion chamber side of the cylinder head with valves in position.
| Identifier | ExFiles\Box 90a\6\ Scan019 | |
| Date | 14th July 1936 guessed | |
| 18 VALVE RETAINING TOOL SPARKING PLUG SPANNER WATER TRANSFER COVER PLATE TAPPET ROD Fig. 29. Combustion chamber side of the cylinder head with valves in position. The valve retaining tool is used when changing a valve spring, preventing the valve from dropping. Note the holes in the head through which the tappet rods operate and through which oil finds its way to the sump. | ||