Group
Item
Gap
No. 1 com-
..
pression
�
ring
·.::
0
..
.:;
..,
No. 2 compression
ii;
>
0
ring
th
bl)
·.::
.s
-
i
ii:
Oil ring
Cl.
co
.a
i$
e
-�
Diameter
"p.
.:
0
Clearance in pistons
iE
Fit in piston pin
bushings
Inside diameter
�
of piston pin
0
bushing
..
bl)
·3
Bend, twist
u
.:
t'.:rankpin diameter and fit
u
in connecting rod bearing
Nominal
dimension
2.5 (0.098)
2.0 (0.079)
4.0 (0.157)
25 (0.984)
25 (0.984
)
58 (2.283)
Assembly standard
[Standard clearance]
0.30 -0.50
lco.0118 -0.0191>1
0.050 -0.085
lco.00191 -o.oo335)
l
0.025 -0.060
lco.00098 -0.00236)1
0
0
-0.006 '-0.00024
)
0 -0.016
lco -0.00063
)
1
0.020 -0.051
((0.00079 -0.00201))
+0.020 (+0.00079)
+0.045 +0.00177
0.05/ I 00 (0.002/4 ),max
O.D35 -0.100
lco.00138 -0.00394>1
Repair limit
Service limit
Remedy
[Clearance]
[Clearance]
I 1.5 I
(0.059)
I 0.20 I
(0.0079)
Replace rings if service
limit is reached. Re-
place pistons if the
limit is exceeded.
I 0.15 I
(0.0059
)
Replace piston pin if
I o.o5 I
repair limit is reached.
(0.0020)
Replace piston if the
limit is exceeded.
I 0.08 I
Replace piston pin or bush-
(0.0031)
ing. (Ream if necessary.)
0.15/100
(0.0059/4)
Replace bearings if repair
limit is reached. Regrind
I 0.20 l
(0.0079)
crankpins and use under-
size bearings if repair
limit is exceeded.
Unit· mm (in )
Remarks
Compress rings to 77) dia.
tommw,. �
o
o
oC)
o
�
.g
a
oa�c
0
C
,)
Ring side clearance
Measure side clearance
with ring kept flush with
second land.
-
CD
®
@
1-Compression ring
2-Straightedge
3-Piston
2) When replace oil ring,
replace it together with
expander.
Cap must be installed with
marks on cap and rod on
the same side.
