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 water and oil temperature issues, with proposed tests and modifications.
| Identifier | ExFiles\Box 82\1\ scan0212 | |
| Date | 22th August 1933 | |
| -2- Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}2/MA.22.8.33. Cont'd.{John DeLooze - Company Secretary} On an average on this test your water temperature has been 15°C. higher and your oil temperature 25°C. higher than previously. We believe that we have made your oil temperature worse by fitting the reduced type of matrix. We should like you to confirm that your oil temperature is effected by your water temperature. You will only be able to do this when the weather has cooled down a bit. The test we have in mind is to run with the water at 75°C., and get a figure for your oil temperature. Then restrict your thermostat opening until the water rises to 95°C. and get another figure for the oil temperature. It is worth making this test, because on none of the production chassis can we reproduce the high temperatures we obtained on your car running to Bignall's Corner. I am getting the larger oil pump repaired and have already got the ribbed timing case completed. If we get any improvement over here on oil temperature with this arrangement we shall let you have it at the completion of the 10,000 miles running. We observe that the piston ring tops now appear to be quite satisfactory and should like to no how the engine and the gudgeon pins are behaving. Are you quite satisfied that we shall have know trouble at this point? Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||