7M-GTE Front Mark Front Piston Size Mark (0, 1, 2, 3 or 4) EM0185 Piston diameter: STD size 7M-GE Mark "0" 82.900 — 82.910 mm (3.2638 — 3.2642 in.) Mark "1" 82.911 — 82.920 mm (3.2642 — 3.2646 in.) Mark "2" 82.921 — 82.930 mm (3.2646 — 3.2650 in.) Mark "3" 82.931 — 82.940 mm (3.2650 — 3.2654 in.) Mark "4" 82.941 — 82.950 mm (3.2654 — 3.2657 in.) 7M-GTE Mark "0" 82.910 — 82.920 mm (3.2642 — 3.2646 in.) Mark "1" 82.921 — 82.930 mm (3.2646 — 3.2650 in.) Mark "2" 82.931 — 82.940 mm (3.2650 — 3.2653 in.) Mark "3" 82.941 — 82.950 mm (3.2654 — 3.2657 in.) Mark "4" 82.951 — 82.960 mm (3.2658 — 3.2661 in.) O/S 0.50 7M-GE 83.40 — 83.45 mm (3.2835 — 3.2854 in.) 7M-GTE 83.41 — 83.46 mm (3.2839 — 3.2858 in.) (b) Measure the cylinder bore diameter in thrust directions. (See page EM-74) (c) Subtract the piston diameter measurement from the cylinder bore diameter measurement. Standard oil clearance: 7M-GE 0.08 — 0.10 mm (0.0031 — 0.0039 in.) 7M-GTE 0.07 — 0.09 mm (0.0028 — 0.0035 in.) Maximum oil clearance: 0.13 mm (0.0051 in.) If the oil clearance is greater than maximum, replace the piston. If necessary, rebore all six cylinders and replace all six pistons. If necessary, replace the cylinder block. HINT: (Use cylinder block sub-assembly) When installing a standard piston, install one with the same mark as the standard bore diameter mark on the cylinder block. 3. INSPECT CLEARANCE BETWEEN WALL OF RING GROOVE AND NEW PISTON RING Using a thickness gauge, measure the clearance between new piston ring and the wall of the piston ring groove. Ring groove clearance: No.1 0.03 — 0.07 mm (0.0012 — 0.0028 in.) No.2 0.02 — 0.06 mm (0.0008 — 0.0024 in.) If the clearance is not within specification, replace the piston. EM0541