Acura NSX 1991 Manual page 137

Main Menu Table of Contents
Piston/Connecting Rod
Assemblies
1.
2.
Inspection
Check the piston for distortion or cracks.
NOTE: If cylinder is bored, an oversized piston
must be used.
Measure piston diameter at a point 17 mm (0.67 in)
from the bottom of the skirt.
NOTE: There are two standard-size pistons (A =
no letter and B). The letter is stamped on the top of
the piston. These letters are also stamped on the
block as cylinder bore sizes.