1
ENGINE MECHANICAL
-
Cylinder Block
EM-49
C. Inspect piston pin oil clearance
a
(a)
Using
a
caliper gauge, measure the inside diameter of
the connecting rod bushing.
Bushing inside diameter:
29.008
-
29.020 mm (1.1420
-
1.1425 in.)
tance
(b)
Using
a
micrometer, measure the piston pin diameter.
Piston pin diameter:
29.000
-
29.012 mm (1.1417
-
1.1422 in.)
(c)
Subtract the piston pin diameter measurement from
the bushing inside diameter measurement.
I
Standard oil clearance:
0.004
-
0.012 mm
(0.0002
-
0.0005 in.)
Maximum oil clearance:
0.05 mm (0.0020 in.)
BORING
OF CYLINDERS
HINT:
Bore all four cylinders for the oversized piston outside
diameter.
Replace the piston rings with ones to match the over-
sized pistons.
KEEP OVERSIZED PISTONS
Oversized
(01s 0.50) piston diameter:
2L-T
92.440
-
92.470 mm (3.6394
-
3.6405 in.)
3L
96.440
-
96.470 mm (3.7968
-
3.7980 in.)
CALCULATE AMOUNT TO BORE CYLINDER
(a)
Using
a
micrometer, measure the piston diameter
at
right angles to the piston pin center line, the indicat-
ed distance from the piston head.
Distance:
2L-T
58.27
-
58.33 mm (2.2941
-
2.2965 in.)
3L
56.27
-
56.33 mm (2.2153
-
2.2177 in.)
(b) Calculate the amount each cylinder
is
to
be
rebored
as
follows:
Size to
be
rebored
=
P
+
C
-
H
P
=
Piston diameter
C
=
Piston oil clearance
0.05
-
0.07 mm (0.0020
-
0.0028 in.)
H
=
Allowance for honing
0.02 mm (0.0008 in.) or less
BORE AND HONE CYLINDERS TO CALCULATED
DIMENSIONS
Maximum honing:
0.02 mm (0.0008 in.)
NOTICE:
Excess honing will destroy the finished round-
ness.
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