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).
Axle oil leaks due to overfilling and engine overheating issues causing sticking valves.
| Identifier | ExFiles\Box 47\2\ Scan381 | |
| Date | 3rd November 1930 | |
| Hs{Lord Ernest Hives - Chair}/GWH{George W. Hancock - Head Chateauroux}/MH{M. Huckerby}3.11.30 contd. -6- These cars had not got the modification of the air vent to the axle casing. An air vent was fitted in each case. The extra pint of oil that has been instructed seems to cause worse leaks in-so-far that it is overdone. In one case a pint and a half was drained out, as well as the near side hub being flooded. There must have been at least a quart of extra oil in this axle. I would suggest that once the axle has been thoroughly warmed up and the oil flung into the tubes it should not be necessary to add the extra pint. Over-heating. 16-WR. 1-GN. 69-CL. 67-KR. 17-KR. 61-CL. In the majority of these cases there were complaints of the valves sticking. The overheating of the cylinder head is the cause. It entails the dismantling of the head to ease the valve guides and also make good any distortion of the valves. I found the method of dealing with the cylinder head was as follows :- The valves were taken out and sent to have the seatings ground irrespective of their condition. The seating in the cylinder head were recut irrespective of their condition. I pointed out that it was not necessary to recut the whole of the seatings especially that in doing so the seating would most probably be more out of alignment with the guide than | ||