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).
Issues with thermostatically operated shutters, fan belt failure, ignition plugs, and bonnet modifications.
| Identifier | ExFiles\Box 5a\3\ 03-page176 | |
| Date | 14th December 1931 guessed | |
| -10- Thermostatically Operated Shutters. E.57000 Bottom Tank. E.56692 Round Matrix Tubes. (Brass) Anti-Splash Radiator Cap. E.56992-9 Radiator Shutters. E.57462/66/70 Bottom Shutter Bearing Strip. Milled away to prevent stones jamming shutters. We have, as reported, had the water temperature build up during slow running, but we are convinced that the trouble is with the water pump and not the inefficiency of the radiator. We find that the height of the water in the radiator to remain consistent must not be more than one inch above the matrix tubes. The radiator dropped on the N.S. and was resting on the cross-member through the failure of the bakelite o&p support. This had broken and one half of it had disappeared. The dropping of the radiator caused the shutters to foul the starting handle spindle and the shutters would not close. A new cup was obtained and fitted. The lag on the inlet pipe for the stay to the radiator from the dash, became loose the soldered joint breaking and the screw becoming loose. The soldering, from what was observed had only been carried out on the outside edges, there was none underneath. The lug was cleaned and resoldered. The radiator shutters have been very sluggish in closing, there does not appear to be anything definite about them closing, with the result that the water temperature gets too cool whilst standing for a short period or when coasting. There has been a rattle from the shutters. We have not had any trouble with stones preventing the shutters from closing. There has been no sign of water leaks from the matrix. FAN to LOP.R.53250 Lec.2921. The fan belt broke at a mileage of 8,300. It is believed to be caused by being too tight when first fitted, which breaks the inner core. We found upon fitting our spare belt that it was too tight, we therefore cut the stop off the bracket allowing the adjustment more range. The belt was not overstrained and ran 1,000 miles before it needed adjusting. We noticed that one of the rivets holding the fan blades was loose not having been firmly snapped up. The fan bearings have given no trouble. K.L.G. IGNITION PLUGS. We have had one failure with these plugs. This was caused by the metal ring at the bottom of the centre electrode insulation, falling off and dropping on to the points. There has been no sign of pre-ignition throughout the speeds of the car. The general condition of the plugs was good. BONNET. SIMILAR to N.S.3894 (P.11.) Rivetless Bonnet to suit modified Radiator dropped ¼" in Frame and Wider Dashboard. 2 ventilator shutters (Flip-Flap Type) fitted in each side plate. | ||