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).
Engine dismantling report detailing the condition of pistons, cylinders, and valves.
| Identifier | ExFiles\Box 83\1\ scan0193 | |
| Date | 14th September 1936 | |
| Xroda HOTEL DE FRANCE. CHATEAUROUX. Indre. France. GWH{George W. Hancock - Head Chateauroux}/IMW{Ivan M. Waller - Head of Chateauroux}/3/JAB. 14th September 1936. To. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} G.W.H. 6. B. IV. The new con-rods arrived on Saturday & running was resumed yesterday. While the engine was dismantled, the following points were noted. PISTONS. Existing, complete set of "Aerolite" Pistons. Identification M.9. "D" type Scraper Rings. The pistons & rings were in good condition. The bedding was even and there was no appreciable wear of the ring grooves. CYLINDERS.LOP EB.2715. Existing, complete to above LOP incorporating :- EB.2929 Cylinder Block mod. to LEC 5117, the front 8 water holes blanked up. EB.2560 Cylinder Head. Deterbulated to LEC 5002. Cylinder bores radiused at the base of barrels to pistons scoring - to RM{William Robotham - Chief Engineer} III. The cylinder bores appeared in good condition. The carbon deposit in the head was low for the mileage and the state of all six combustion chambers was uniform. The valve seatings appeared slightly pocketed but there has been no loss of tappet clearance during the last 7000 miles running. There was no necessity to re-cut any of the seatings. The head was decarbonised. VALVES & FITTINGS. LOP EB.2708 Existing, complete to above LOP incorporating :- 3 EB.2970 Exhaust Valves KE 965 Stellited Nos.1,2,& 3, cylinders, standard clearance. 3 EB.2970 Exhaust Valves S/SLV. Stellited Nos.4,5,& 6, cylinders, diametrical clearance between valves & guides .0015" - .002" 6 EB.2793 Inlet Valves - S/SLV. diametrical clearance of .0015" - .002" in the guides. The necks of the KE 965 were more deeply scaled than the necks of the S/SLV exhaust valves in each case. The seats were uniformly burnt, but not deeply. There were no signs of picking up on the valve stems, and there was no visible difference between the state of the KE 965 & S/SLV | ||