Nissan 12201-1KC0A Crankshaft Assembly

Remove the pistons and connecting rods as needed, ensuring that if no work is required on them, the cylinder head does not need to be removed, and the pistons should only be pushed up enough to clear the crankshaft journals. Check the crankshaft endfloat, and ensure the main bearing caps are numbered 1 to 5 from the timing chain end for petrol engines or from the flywheel end for diesel engines; if they are not numbered, mark each cap to indicate its correct orientation and position. Progressively slacken the main bearing cap retaining bolts from the outer ends to the center, then unscrew and remove them from the cylinder block. Withdraw the bearing caps and recover the lower main bearing shells, taping each shell to its respective cap for safekeeping. Carefully lift out the crankshaft, ensuring the upper main bearing shells remain in place, then recover the upper bearing shells from the cylinder block and tape them to their respective caps. Finally, remove the thrustwasher halves from the side of No 3 main bearing and store them with the bearing cap.