Honda Acura NSX 1991 Service Manual page 142

Cylinder Block
Piston-to-Block Clearance -
Make a preliminary piston-to-block cleara
with a feeler gauge:
Service Limit:'0.0825 mm (0.0032 in)
0.0825 mm (0.00032 inl
If the clearance is near or exceeds the
inspect the piston and cylinder block for
wear.
To confirm the feeler gauge chec
measurement with a micrometer will be
2. Calculate difference
diameter on page 7-l 3 and piston diam
Piston-to-Cylinder Clearance:
Service Limit: 0.0825 mm (0.0032 in)
SE
between
Pistons
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 bottom of skirt.
NOTE: There are two standard-size pistons (A and
These letters are also stamped on the block as
cylinder bore sizes.
Piston A Diameter
Standard (New): 89.986-90.004 mm
(3.5427-3.5434 in)
89.97 mm (3.5421 in)
Service Limit:
Piston 8 Diameter
Standard (New): 89.976-89.994 mm
(3.5424-3.5431
Service Limit: 89.96 mm (3.5417 in1
Oversize Piston Diameter
0.25: 90.226-90.244 mm (3.5522-3.5530 inl
0.50: 90.476-90.494
in)
SKIRT DIAMETER
mm (3.5620-3.5627 in1