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DEFENDER ENGINE Fitting connecting rods and pistons 1. Ensure that the essentric headed big end bolts rods and as a precaution against possible damage t o the crankshaft journals of the pistons, cover the bolt threads with a layer of adheasive tape. Check that the number o n the connecting rod is the same as the piston and cylinder and that they are correctly orientated. 2. With the cylinder block vertical, and 2 and crankshaft journals at BDC lubricate and install and 3 piston connecting rod assemblies so that the piston rings are resting o n the block illustrated, then using a suitable tool compress 4. Pull both connecting rod big ends on t o the journals and fit the caps ensuring the the numbers match and orientation is correct. Retain the caps with new nuts but d o not tighten at this stage. at BDC and install t h e pistons and connecting the correct torque and check that the which when tightened restricts the freedom of the crank shaft. sideways o n its journal and if necessary check the actual side clearance using a feeler gauge. The correct clearance is given in the data section. 9. To allow for shrinkage after fitting leave the 3. Stagger the piston rings on both pistons as seals standing proud of the crankcase face then using a sharp blade, trim the seals off to face. approximately above the crankcase into the cylinder bore. 5. Tum the crankshaft so that and 4 journals are 7. Tighten both nuts on o n e connecting rod to Investigate and rectify any big end bearing 9. Check that each big e n d is free to move 59 |