Acura NSX 1991 Manual page 139

Main Menu Table of Contents
Connecting Rods
Selection
Each rod is sorted into one of four tolerance ranges
(from 0 to 0.024 mm, in 0.006 mm increments) depen-
ding on the size of its big end bore. It's then stamped
with a number (1, 2, 3 or 4) indicating that tolerance.
You may find any combination of 1, 2, 3 or 4 in any
engine.
Normal Bore Size: 53 mm (2.09 in)
NOTE:
• Reference numbers are for big end bore size and
do NOT indicate the position of the rod in the
engine.
• Inspect each connecting rod for cracks and heat
damage.
CONNECTING ROD BORE
REFERENCE NUMBER
Half of number is stamped on
bearing cap, the other half on
connecting rad.
Inspect bolts
and nuts for
stress cracks.