Honda Acura NSX 1991 Service Manual page 144

Cylinder Block
1 . Measure cylinder bores as shown on page 7-l 3. If
the block 'is be reused, hone the cylinders and
remeasure the bores.
2. Hone cylinder bores with honing oil and a fine (400
grit) stone in a 60 degree cross-hatch pattern.
NOTE:
such as Sunnen, Ammco,
3. When honing is complete, thoroughly clean the
engine block of all metal particles. Wash the
cylinder bores with hot soapy water, then dry and
oil the cylinder walls immediately.
NOTE: Never use solvent, it will only redistribute
the grit.
4. If scoring or scratches are still present in cylinder
bores after honing to service limit, rebore the
engine block.
E N G I N E
NOTE:
soapy water.
honed.
7-14
Piston/Connecting Rod
Assemblies
or equivalent.
H O N E
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:
do NOT indicate the position of rod in engine.
damage.
CONNECTING ROD BORE
REFERENCE NUMBER
Half of number is stamped on
bearing cap, the other half on
connecting Iad.
Inspect dolts
and nuts for
stress cracks.