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).
Tests on a modification to prevent oil leakage down valve stems.
| Identifier | ExFiles\Box 10\3\ 03-page211 | |
| Date | 15th May 1939 | |
| 65H - 1360 To By.{R.W. Bailey - Chief Engineer} from Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} c. Hs.{Lord Ernest Hives - Chair} c. Da.{Bernard Day - Chassis Design} c. MX.{John H Maddocks - Chief Proving Officer} c. DS/Wch. c. Rm{William Robotham - Chief Engineer}/OHR. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}7/RH.{R. Hollingworth}15.5.39. We have carried out tests with regard to stopping the oil going down the valve stems, in conjunction with MX.{John H Maddocks - Chief Proving Officer} Commencing with the original Adhere EOD.840 which housed a Klingerit washer in the top spring washer, these disintegrated or jumped out. A modification to the above scheme has been tried (EOD.1022) and up to the present has worked very satisfactorily, having completed 4,700 miles on Hs{Lord Ernest Hives - Chair}'s car without complaint of misfiring etc. through oil on the plugs. The Neoprene washers are intact and in good condition. A similar set have recently been fitted to a Wraith Trials car by OHR. but as yet no information is available. The scheme consists of a wedge-shaped recess in the top washer and a correspondingly shaped Neoprene sealing washer is, by its pliable nature, clipped into position. We consider that these show sufficient promise to be incorporated on chassis which are troubled with recurrent oiling of plugs etc. | ||