1. Remove the crankshaft and pistons. Check the piston for distortion or cracks. Measure the piston diameter at a point 14 mm (0.6 in.) from the bottom of the skirt. There are two standard-size pistons (A and B). The letter is stamped on the top of the piston. Letters are also stamped on the block as cylinder bore sizes.
   Piston Diameter
   Standard (New):
   A: | 84.950−84.980 mm (3.3445−3.3457 in.)
   B: | 84.940−84.970 mm (3.3441−3.3453 in.)
   Service Limit:
   A: | 84.920 mm (3.3433 in.)
   B: | 84.910 mm (3.3429 in.)
   Oversize Piston Diameter
   0.25: | 85.200−85.230 mm (3.3543−3.3555 in.)