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).
Excessive crankshaft wear in 4 1/2 Litre Bentley vehicles and the recommendation to fit oil filters.
| Identifier | ExFiles\Box 89\4\ scan0374 | |
| Date | 1st December 1938 | |
| Svr c. Rm.{William Robotham - Chief Engineer} cr.{Mr Cra???ster / Mr Chichester} Rm.{William Robotham - Chief Engineer} 261 BY.3/G.1.12.38. 4 1/2 LITRE BENTLEY - RE: WEAR OF CRANKSHAFTS. With reference to chassis Nos. B.94.KT. B.72.HK.{Col. T. Harker - Sales} B.102.HK.{Col. T. Harker - Sales} The bearing wear of the first one quoted, i.e. Mr. B. Emery's chassis, at 9000 miles, is phenomenal for the mileage. All three certainly demanded regrinding, and in order to avoid in future the continued wear we would suggest fitting, if possible, at the customer's expense, bye-pass oil filters, particulars of which, and for fitting same, we enclose herewith, as per print S.CD.1000, which shows this on a later type chassis. I am at a loss to understand the excessive wear in the crankshaft from B.94.KT. other than from fierce driving on the part of the customer, but even this does not to my mind account for what has occurred, and we would recommend in this customer's case, if he is resident in France, that the addition of an oil filter would relieve the situation. By BY.{R.W. Bailey - Chief Engineer} | ||