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 an overheating issue on Chassis 86-WR, concerning the cylinders and a suspected faulty valve seat.
| Identifier | ExFiles\Box 47\2\ Scan146 | |
| Date | 30th October 1929 | |
| X4117. Fes/RJ.30/10/29. Re: Chassis 86-WR - H.Mills Esq. We have dismantled the cylinders and cylinder head of this car, and have instructed our Stores to return them to Works Experimental Dept. We have removed the end and plates of the head and find very little corrosion to have taken place, and we are at a loss to account for the overheating trouble. When the customer arrived, I asked him for details of engine temperatures on his run up from Dijon, and he replied he had had no trouble whatever on that particular trip, due in his opinion to the cold weather we experienced in France at that time. This however does not satisfy me, because if an engine is overheating as a result of losing water due to piling up, then the outside temperature will have little effect, neither should outside temperatures alter the effects of restriction in the water system. Apart from this I would suggest there is something definitely wrong with No. 3 valve seat. We have never been able to regulate this valve to maintain a clearance with the rocker, the result has been the seat and valve pick up and upset the compression of that cylinder. We have attended to this on three occasions. Ps. | ||