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... is carried in seven 2f in. diameter (69.85 mm.) steel backed, lead bronze bearings. CYLINDER HEAD AND VALVE OPERATION—Cast in aluminium alloy and incorporating fully machined hemispherical combustion chambers. Large dia meter valves inclined to 80° included angle, with exhaust valve guides in direct contact with water. Twin overhead camshafts operate the valves direct through hardened nickel molybdenum steel tappets. Camshaft driven by two stage Duplex roller chains with manual adjustment tensioners. PISTONS AND CONNECTING RODS—Three com pression rings. One spring steel oil control ring, large diameter gudgeon pin located by circlips. Forged rods in nickel chrome molybdenum .rteel, weight, graded and balanced. LUBRICATION SYSTEM—Ry front mounted chaindriven oil pump and full flow cartridge filter. Oil cooler standard equipment. COOLING SYSTEM—Cooling by pump and mechani cal fan. Cross flow radiator with separate header tank. COOLING SYSTEM (DB S) COOLING SYSTEM—Cooling by pump and mechani cal fan. Cross flow radiator with separate header tank. Special underbonnet air extractors in each front mud wing. IGNITION—High efficiency coil with ballast resistor. Distributor incorporated automatic advance and vernier adjustment. CLUTCH—Hydraulically operated diaphragm spring clutch. GEARBOX—Five speed all synchromesh on which fifth speed in overdrive. ...
Source:Archiv
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Aston MartinDB S (1966) Aston MartinDB 6Volante (1966) Aston MartinDBSC (1966)