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).
Water leaks from the Phantom III cylinder head gasket and proposed solutions.
| Identifier | ExFiles\Box 93\4\ scan0134 | |
| Date | 12th May 1938 | |
| To RHC.{R. H. Coverley - Production Engineer} from Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} 319. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}4/MH.{M. Huckerby}12.5.38. PHANTOM III CYLINDER HEAD GASKET. Regarding the water leaks from the above and coming up by the studs this was originally complained of when the 4 port head was first introduced in production. This was found to be faulty ferrules in the gasket and when correct gaskets were fitted the leaks were cured and until now we have not heard of any more complaints. Other than ensuring the gasket is of approved type regarding the sealing ferrules we do not see why we should have run into any trouble providing (a) Under side of liner flange is a good seal on the alum block flange. (b) That the liner stands proud by the correct amount from the block .002. As you consider from your sketch that the narrow width of sealing on the liner is responsible we recommend that the bore of the gasket be reduced from 3.525 to 3.475 over the combustion chamber length and including your suggestion of 3.400 at right angles to the combustion chamber length. Proof of whether this is the solution can be obtained by trial of an obsolete set of 6 port head gaskets which have a 3.4 bore. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} | ||