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).
Notes and a diagram regarding the casting and venting of a water jacket core for an Oldsmobile 6-cylinder engine.
| Identifier | ExFiles\Box 174\2\ img060 | |
| Date | 27th May 1937 | |
| (sheet 3) E.1/HP.27.5.37. We saw a further example of a water jacket core being made in the same foundry for the Oldsmobile 6 cyl. side valve engine. This core had given considerable trouble resulting in a most elaborate venting system being used as follows:- [Diagram Annotations] A - VERTICAL VENT B - PEELING SECTION 4 - 1/4" DIA WIRES - ONE ABOVE THE OTHER 4 - 1/4" DIA WIRES C - REACH PASS-THROUGH BELOW AND ABOVE D - HORIZONTAL REACH PASS-THROUGH BY ONE LONGITUDINAL WIRE Drawing shows core as moulded, looking down on gas bends for side valves, these locating horizontal split in jacket core. The points to bear in mind from Buick experience are:- (1) The casting must be shaken out from the mould as soon as possible, in their case 20 to 25 minutes, when the casting is a bright cherry red, otherwise the slow cool in the sand causes draw and porosity. This rule is rigidly followed even at the ends of shifts, the work being arranged to ensure this. | ||