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6
a
8
7
NOTE:
To avoid interchanging the pistons, connect-
ing rods, and connecting rod caps, mark
each with an identification number a of the
corresponding cylinder and be sure to keep
them in the order as they were removed.
9. Remove the piston rings.
Checking the piston diameter
1. Measure the piston diameter at the spec-
ified measuring point. Replace if out of
specification.
Piston diameter a:
55.950–55.965 mm
(2.2028–2.2033 in)
Measuring point b:
1.5 mm (0.06 in) up from the
bottom of the piston skirt
Oversize piston diameter:
Oversize 1st:
56.200–56.215 mm
(2.2126–2.2132 in)
Oversize 2nd:
56.450–56.465 mm
(2.2224–2.2230 in)
6AU3K11
a
6
S6AU5130
5
Checking the cylinder bore
1. Measure the cylinder bore (D
measuring points a, b, and c, and in
direction d (D
, D
1
3
to the crankshaft, and in direction e (D
D
, D
), which is at a right angle to the
4
6
crankshaft.
a
b
D
2
c
D
4
D
6
a 20 mm (0.8 in)
b 40 mm (1.6 in)
c 60 mm (2.4 in)
Cylinder bore (D
56.000–56.015 mm
(2.2047–2.2053 in)
Checking the piston clearance
1. Check the piston clearances if replacing
the piston, piston ring set, cylinder block,
or all parts.
NOTE:
The figures are for reference only. Depend-
ing on how the parts are assembled, the
actual measurements may not be within the
specified ranges.
Piston clearance (reference data):
0.035–0.065 mm
(0.0014–0.0026 in)
Cylinder block
5
–D
) at
1
6
, D
), which is parallel
5
,
2
D
1
d
D
3
e
D
5
S69J5B70
–D
):
1
6
5
5-42
1
2
3
4
5
6
7
8
9
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