Rolls-Royce Archives
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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
  
  


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