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).
Exhaust and inlet valve clearances for a Bentley under various driving conditions.
| Identifier | ExFiles\Box 88\4\ scan0153 | |
| Date | 13th December 1935 | |
| W/LH{Mr Haworth} - JLE.{J. Lee Evans - Chassis Test Manager} X 254 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}1/KW.13.12.35. Replying to LE.8/C/9.12.35. The KE-965 exhaust valves at present fitted to the Bentley should be alright at .004" clearance under everything except extreme hard driving conditions. We admit, however, that under our 10,000 miles conditions, when the car is flogged unmercifully, we may run up to .006" exhaust valve clearance. The inlets are of course perfectly satisfactory between .002" and .003". Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||