ENGINE MECHANICAL — Cylinder Block EM-75 HINT: There are five sizes of standard cylinder bore diameter, marked "0", "1", "2", "3" and "4" accordingly. The mark is stamped on the cylinder block as shown in the illustration. Standard cylinder bore diameter: STD size Mark "0" 82.990 - 83.000 mm (3.2673 - 3.2677 in.) Mark "1" 83.001 - 83.010 mm (3.2677 - 3.2681 in.) Mark "2" 83.011 - 83.020 mm (3.2681 - 3.2685 in.) Mark "3" 83.021 - 83.030 mm (3.2685 - 3.2689 in.) Mark "4" 83.031 - 83.040 mm (3.2689 - 3.2693 in.) Maximum cylinder bore diameter: STD size 83.24 mm (3.2772 in.) O/S 0.50 83.74 mm (3.2968 in.) If the diameter is greater than maximum, rebore all six cylinders. If necessary, replace the cylinder block. 6. REMOVE CYLINDER RIDGES If the wear is less than 0.2 mm (0.008 in.), use a ridge reamer to machine the top of the cylinder. DISASSEMBLY OF PISTON AND CONNECTING ROD ASSEMBLIES (See page EM-63) 1. CHECK FIT BETWEEN PISTON AND PIN Try to move the piston back and forth on the piston pin. If any movement is felt, replace the piston and pin as a set. 2. REMOVE PISTON RINGS (a) Using a piston ring expander, remove the compression rings.