Section 1 - Cylinder Block - Group 01 Piston - Cleaning and Inspection for Reuse (1-20) M11 Page 1-61 Visually inspect the piston skirt pin bore (1) and sides (2) for cracks or damage. Do not use pistons with cracks. If the skirt is cracked, it must be replaced. Measure the piston skirt outside diameter at room tem- perature 21°C [70°F]. Piston Skirt O.D. mm in (A) 124.939 MIN 4.9189 124.983 MAX 4.9206 The ring groove can be inspected with a new ring and a feeler gauge. Hold a new ring in the groove even with the outside diameter of the piston. Install a 0.15 mm [0.006 inch] feeler gauge. If the feeler gauge enters the groove without resistance, there is too much wear. Replace the piston.
Measure the piston pin bore inside diameter. Articulated Piston Pin Bore I.D. (Crown) mm in 54.040 MIN 2.1276 54.055 MAX 2.1281 Articulated Piston Pin Bored I.D. (Skirt) mm in 54.007 MIN 2.1263 54.015 MAX 2.1266