SECTION F Pistons and Connecting Rods F1 F2 To Remove Pistons and Connecting Rods With 4.108 pistons there is a steel insert rolled into the top ring groove during piston manufacture. It should be regarded as an integral part of the piston and no attempt should be made to remove it from its location. 2. Remove the circlip retaining the gudgeon pin and push out the gudgeon pin to release the con- necting rod. 1. Remove the cylinder head assembly. (Refer to Page E.1). 2. Remove the oil sump. (Refer to Page L.1 ). NOTE: Any ridges or carbon deposits around the top of the cylinder bore should be removed with a suitable scraper before piston removal is attempted. 3.
Rotate the crankshaft until one pair of big ends are at bottom dead centre, then remove their respec- tive connecting rod cap securing bolts. 4. Remove the connecting rod caps and bearing shells. (Refer to Fig. F.1). NOTE: If the bearing shells are serviceable, they should be suitably marked to identify them to their original locations. 5. Push the pistons and connecting rods carefully out through the top of the block and remove as shown in Fig. F.2. 6. Rotate the crankshaft through 180 Q to bring the remaining pair of big ends to bottom dead centre and repeat removal operations. When piston removal has been carried out keep each piston and rod assembly separate, each to each as marked.
Mark the pistons on the crown (before removing the gudgeon pin) to indicate the 'FRONT' in relation to the 'FRONT' marking cast on the connecting rods. NOTE: Should difficulty be experienced in re- moving the gudgeon pin, warm the piston in a suit- able clean liquid (usually water) to a temperature of 100-120°F, (40-50°C), this will then enable the pin to be pushed out quite easily. To Remove Pistons and Rings from the Connecting Rods 1. Remove the piston rings from each piston, using a suitable piston ring tool, such a tool is shown in Fig. F.3. NOTE: The laminated segments or spring loaded rings fitted in the fourth ring groove should be removed by hand. F3