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2.25 LITRE PETROL AND DIESEL ENGINE 19. The hexagon-headed plugs at the rear of the block should have new washers fitted, and their threads 20. Thoroughly clean the cylinder block preferably cut t ings . Check crankcase main bearings 21. Discard pitted, cracked and worn bearing shells. determine the maximum wear, assemble the main bearing shells and caps to the crankcase and t h e correct torque figure. 23. Using an inside micrometer, measure each bearing at several points and note the greatest figure. The figure and the smallest of the corresponding crankshaft journal. The main 24. The bearing clearances may also be determined by using ‘Plastigauge’. Since this method requires the crankshaft to be fitted to the crankcase, the procedure is described under engine assembly. PISTON AND CONNECTING-ROD INSPECTION The following checks relating to pistons and rings must also be carried out prior t o fitting new pistons to rebored and sleeved cylinder blocks. Until it is decided if new components are required all parts must be kept in their related sets and the position 1. Remove the piston rings and gudgeon pin from each piston and the connecting-rod. 2. Original pistons - Decarbonise and dcgrease all the pistons and rings and discard any which are unserviceable. Pistons which appear serviceable be subjected to a more detailed examination described under ‘New Pistons’. a continued 11 |