Cylinder Block Inspection - Acura NSX 1997 Service Manual

Main Menu
Cylinder Block
Inspection
1. Measure wear and taper in directions X and Y at
three levels in each cylinder as shown.
Cylinder Bore Size
M/T:
Standard (New):
A or I 93.010 - 93.020 mm (3.6618 -3.6622 in)
B or il 93.000 - 93.010 mm (3.6614-3.6618 in)
Service Limit:
A/T:
Standard (New):
A or I 90.010 - 90.020 mm (3.5437 -3.5441 in)
B or il 90.000 - 90.010 mm (3.5433 -3.5437 in)
Service Limit:
Oversize (A/T):
0.25: 90.25 - 90.26 mm (3.553 - 3.554 in)
0.50: 90.50 - 90.51 mm (3.563 - 3.563 in)
Table of Contents
CYLINDER BORE SIZES (A or B)
NOTE: To maintain proper piston
clearance, match these letters with
the letters on the pistons. The let-
ters on the block read from left to
right, No. 1 through No. 3 cylinders
on the first line and No. 4 through
No. 6 cylinders on the second line.
93.07 mm (3.664 in)
90.07 mm (3.546 in)
Bore Taper
Limit: (Difference between first and third measure-
ment) 0.05 mm (0.002 in)
• If measurements in any cylinder are beyond
Oversize Bore Service Limit, replace the block.
• If block is to be rebored, refer to Piston Clear-
ance Inspection (see page 7-13) after reboring.
NOTE: Scored or scratched cylinder bores must be
honed.
Reboring Limit (A/T): 0.50 mm (0.020 in)
2. Check the top of the block for warpage.
Measure along the edges and across the center as
shown.
SURFACES TO BE MEASURED
Engine Block Warpage:
Standard (New): 0.07 mm (0.003 in) max.
Service Limit: 0.10 mm (0.004 in)
PRECISION STRAIGHT EDGE