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).
Valve noise issues in a 15EX engine and proposed actions for resolution.
| Identifier | ExFiles\Box 17\6\ Scan028 | |
| Date | 7th March 1926 guessed | |
| To H/S 15EX Engine 47060 There is a 50% improvement No1 inlet comes up noisy and remained noisy. There are also slight noises from No 3 inlet & No 6 inlet. When squirted with oil all tappets were quiet. Standard valve rocker cover amplifies the valve noise 50%. We definitely require more oil on the valve stems. We are going to dismantle the head again in the morning and examine No 1 inlet valve seat. G W Hancock | ||