Subaru SVX 1992 Manual page 201

2-3 [W5C2]
ENGINE
(3) Proper combination of pistons and cylinders
Cylinder Piston
Piston clearance
Bore size symbol Cylinder bore dia . Piston grade symbol Standard piston dia .
20°C (68° F)
96 .905 - 96 .915 mm A 96 .885 - 96 .895 mm
(3.8151 - 3 .8155 in) (3 .8144 - 3.8148 in)
B 96 .895 -96 .905 mm B 96 .875 - 96 .885 mm 0 .01 - 0 .03 mm
(3.8148 - 3 .8151 in) (3 .8140 - 3.8144 in) (0 .0004 - 0 .0012 in)
C 96 .885 - 96 .895 mm C 96.865 - 96 .875 mm
(3.8144 - 3 .8148 in) (3 .8136 - 3.8140 in)
2) Measure the inner diameter of each cylinder in both
the thrust and piston pin directions at the heights shown
in the figure, using a cylinder bore gauge.
Measurement should be performed at a temperature
20°C (69°F) .
a0mo
n: Team ai-i . .
B: vinon pin dkmlen
Cy11nOn heed rti,InY _,aei
1 n 10 .191
a
I
90
11 .151
115
1. .511
B2-111
Fig . 117
Taper :
Standard
0.015 mm (0 .0006 in)
Limit
0 .050 mm (0 .0020 in)
Out-of-roundness :
Standard
0.010 mm (0 .0004 in)
Limit
0.050 mm (0 .0020 in)
Cylinder to piston clearance at 20°C (68°F) :
Standard
0.010 - 0 .030 mm (0 .0004 - 0.0012 in)
Limit
0.060 mm (0.0024 in)
Standard diameter:
A 96.905 - 96.915 mm
(3 .8151 - 3.8155 in)
B 96 .895 - 96 .905 mm
(3 .8148 - 3.8151 in)
C 96 .885 - 96 .895 mm
(3.8144 - 3.8148 in)
3) Boring and honing
(1) If the value of taper, out-of-roundness, or
cylinder-to-piston clearance measured exceeds the
specified limit or if there is any damage on the
cylinder wall, rebore it to use an oversize piston .
When any of the cylinders needs reboring, all other
cylinders must be bored at the same time, and use
oversize pistons. Do not perform boring on one cylin-
der only, nor use an oversize piston for one cylinder
only .
(2) Get six of the oversize pistons and measure the
outer diameter of each piston at the height shown in
the figure . (Thrust direction)
Measurement should be performed at a temperature of
20°C (68°F) .
Piston outer diameter :
Standard
A 96 .885 - 96 .895 mm
(3 .8144 - 3.8148 in)
B 96.875 - 96.885 mm
(3 .8140 - 3.8144 in)
C 96 .865 - 96 .875 mm
(3 .8136 - 3.8140 in)
0.25 mm (0 .0098 in) oversize
97 .125 - 97 .135 mm (3.8238 - 3 .8242 in)
0 .50 mm (0 .0197 in) oversize
97 .375 - 97 .385 mm (3.8337 - 3 .8340 in)
h : 52 .0 mm
(2.047 in)
82-112
Fig. 118
62