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).
Procedure for diagnosing and rectifying complaints of overheating cooling water.
| Identifier | ExFiles\Box 24\5\ Scan305 | |
| Date | 1st August 1930 | |
| Hd.{Mr Hayward/Mr Huddy} From Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} For Depot Sheet. c. to Hm.{Capt. W. Hallam - Head Repairs} Paris x766. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson}1/MJ.1.8.30. x766 x7250. x5250. OVERHEATING OF COOLING WATER. ----------------------------- Every year, in hot weather, a number of complaints arise that the water in the cooling system of R.R. cars can be made to boil under severe conditions of hill climbing or high speed. We recommend the following procedure in dealing with such complaints :- (A) Ensure that the engine performance is 100%, that all compressions, ignition timing, etc., are O.K. and that the oil relay filter is clean also that this unit advances the ignition satisfactorily when the engine oil is hot. If this unit is not O.K. it is probably due to dirt on one of the two pistons or an ineffective oil seal on the large piston due to poor rings or leather. The small piston is purposely made with .006 clearance. (B) Ensure that there are no water leaks when the engine is hot or cold, particularly on the suction side of the water pump. A slight leak at the water pump gland can completely upset the circulation. (C) Drain the radiator and by means of a small electric lamp examine the top row of tubes. If there is any sign of a brown deposit like chocolate in these tubes when dry the radiator should be cleaned out with Caustic Soda. (Depot Sheet/09) The flow should be checked after this operation and if unsatisfactory a new matrix will have to be supplied. Matrixes | ||