CYLINDER HEAD—E.2Fig. E.1.Removing an Atomiser.To Remove the ValvesOriginally, all valves were numbered 1.1, 2.2, 3.3, and4.4 with a corresponding number adjacent to each valveface (see Fig. E.31. This practice has now ceased andwhere these valves are to be used again. then theyshould be suitably marked to ensure that they arereplaced in their respective positions.1.Place the cylinder head on the bench with thegasket face downwards.2.Compress the spring caps and springs with asuitable valve spring compressor as shownFig. E.2.Removing the Rocker Shaft Assembly.1. Rocker Shaft Bracket.2. Rocker Lever.3. Oil Feed Connection.in Fig. E.4 and remove the two half conical colletsfrom each valve.3.Remove the spring caps, springs and rubber oildeflectors from the valve stems, thus liberating thevalves which can be taken out when the cylinderhead is turned over.CleaningIt is essential that absolute cleanliness is observedduring the following instructions to prevent the possibilityof damage resulting from particles of hard carbon fallinginto the engine, thereby causing damage to cylinderliners, pistons and bearings, etc.1.Carefully remove all traces of carbon from thecylinder head taking care not to scratch or burr themachined faces.2.If the water jacket of the cylinder head shows signsof excessive scale, a proprietary brand of descalingsolution should be used.3.Blank off the rocker oil feed oil-way betweennumbers 2 and 3 cylinders to prevent the ingress ofcarbon particles and carefully remove the carbonfrom the pistons and cylinder block face againtaking care not to scratch or burr the machinedsurfaces.4.After valve seat machining and valve grindingoperations have been carried out, all parts shouldbe thoroughly washed in a suitable cleaning fluid.Fig. E.3.Numbering of Valves
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