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).
Investigation into a recurrent over-oiling complaint on Chassis 3-DL-2.
| Identifier | ExFiles\Box 131\2\ scan0239 | |
| Date | 22th July 1938 | |
| To By.{R.W. Bailey - Chief Engineer} ... from Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} c. Rm.{William Robotham - Chief Engineer} c. Mx.{John H Maddocks - Chief Proving Officer} c. LA.{L. A. Archer} c. Hd.{Mr Hayward/Mr Huddy} c. Br.{T. E. Bellringer - Repair Manager} Handwritten notes: SWDL{Len H. Swindell}, 11/3, a signature Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux}10/N.22.7.38. Re: Chassis 3-DL-2 - Shakespeare. Over-oiling Complaint. ------------------------------- This is a recurrent case, and the Owner not satisfied. The chauffeur's complaint was No.5. on B. bank continually misfiring due to being oiled up. Examination of all plugs when the car came in to N. found No.1. 5 and 6 on A.{Mr Adams} bank exhaust side very wet, 5 completely cut out. 1 and 6 on B. bank very wet. Inlet side were wet in both cases but not to the same extent. An extensive investigation has been carried out to determine the cause as their was a doubt whether it was due to top over-oiling or pistons over-oiling. The following work has been done:- (1) The car was run for approx. 60 miles at high speed to try the effect of piston rings bedding in; afterwards 2 hours in London traffic. The result was plugs oiled up as previously. (2) A new set of rockers were fitted with a .010" hole in the feed end to valves. New distance pieces fitted between the rockers to cut down end float to the minimum i.e. .003". A new release valve spring E.89166 was fitted to reduce oil pressure feed to the rockers. The first test after carrying out the above work was slow running in the shop. With the oil hot pressure to the rockers was taken. Cont'd..... | ||