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).
Inspection report detailing the condition of engine components like connecting rods, pistons, cylinders, and valves.
| Identifier | Morton\M18\ img045 | |
| Date | 23th April 1934 guessed | |
| -2- Connecting Rods. New oil pipes were fitted replacing the broken ones on No's 3, 6 & 4. No.5 was resoldered. We have not examined the rods, but there is no indication of them having again failed. Pistons. These were left with the stubs of the broken stops in, as they were firm, and no further damage could be done. Compression has been more even. There is no indication of further disintegration. CYLINDERS & CYLINDER HEAD. The bores were in a very good condition, lubrication was on the heavy side. The cylinder head was in a good condition. The seatings of the exhaust valves were in a better condition than when examined at 5000 miles owing to the more positive seating of the valves, the auto tappet adjustment having been deleted. The amount of carbon deposit was normal. A fair amount of wear has taken place in the valve guides, both exhaust and inlet. No.11 push rod shows having rubbed half way down the copper tube that is pressed into the cylinder head. The tube appears to have been slightly buckled in the centre, a gauge will not go through this tube. VALVES & FITTINGS TO LOP.E.84593. LEO.3726. 'R' type valve springs fitted at 5000 miles. E.84426 Inlet Valves. Ex.13757 Exhaust Valves S/SLV. Ex.13756 Exhaust Valve Guide. The exhaust valve seatings were not good but considerably better than when examined at 5000 miles. It was impossible at that mileage to clean the seats up, as they were too deeply pitted. The inlet valves were still in a good condition. There has been no swishing of the valve springs, but there has been a general clatter at 68 M.P.H. and over. No.11 exhaust valve which has been noisy throughout shows a definite one sided seating, either the valve guide has distorted, or the cylinder head drops in the centre, a distinct fringe has been formed on the edge of the exhaust valve seating. The tappets were improved by metering more oil to the plungers. No.1 & 6 were noisy upon first starting up, but were quiet in a few minutes. They became noisy when the oil was hot during slow running through a village owing to the escape of the thin oil from the plunger cylinders. | ||