4OTE To remove gear from crankshaft a hydraulic press is required J 7048 J 3ss 1 Fig 6A 50 Remevinp Crankshaft Gear Ma i Bearings 52 Remove main bearing inserts from each half of rankshaft by rotating bearing insert with fingers ang end first as shown in Figure 6A 51 Identify ach bearing insert and place on a board or suitable storage area NOTE Since the engine rear housing incorpo ates the oil pump pressure regulator and oil F f 1 Fig 6A S1 Removing and Installing Main Bearings cooler by pass valve the disassembly repair and assembly of these parts are outlined under Repairs Engine Components REPAIRS ENGINE COMPONENTS Repairs to engine components preceeding engine assembly are outlined below for cylinder heads pistons and connecting rods engine rear housing crankcase and main bearings CYLINDER HEADS NOTE Always use extreme care to avoid damage to cooling fins Disassembly 1 Place cylinder head assembly on one end of a bench and using Tool J 8062 with off set jaws compress valve spring and remove valve locks as shown in Figure 6A 52 1 L r 1 a 1 Fig 6A 52 Removing Valves Using Tool J 8064 2 Release Tool J 8062 and remove valve spring cap spring shim and valve fig 6A 53 Repeat this operation on each valve assembly Cleaning 1 Clean carbon from combustion chambers and ports using Tool J 8358 fine wire brush shown in Figure 6A 54 CAUTION Avoid injury to cylinder sealing face surface in cylinder head as shown in Figure 6A 55 Injury will cause premature combustion chamber leaks 2 Thoroughly clean valve guide bores using Tool J 8101 fig 6A 55