SINGLE
-
CYLINDER ENGINES
ing it out with an appropriate size drift or
4.
Coat the inside diameter of the plug bore and the outer
pin punch. When removing a large core
diameter of the new plug with sealer. Use an oil
-
resistant
plug, the use of a universal impact slide
sealer if the plug is to be installed in an oil gallery or a wa-
hammer is recommended.
ter
-
resistant sealer for plugs installed in the water jacket.
5. Install the new core plug with an appropriate size core
plug installation tool
(Figure
92),
driver or socket. The
3.
Clean the plug bore thoroughly to remove all traces of outside edge of the plug should be 2
-
3 mm (0.08
-
0.12 in.)
the old sealer. Inspect the bore for any damage that might inside the block.
-
-
interfere with proper sealing of the new plug.
6.
Repeat Steps 1
-
5 to replace each remaining core plug.
Table
1
ENGINE SPECIFICATIONS (1 OM,
1
GMl
0)
Bore
75
mm
(2.95
in.)
Stroke
72
mm
(2.83
in.)
Displacement
318
cc
(19.4
cu. in.)
Number of cylinders
1
Cylinder bore diameter
75.000
-
75.030
mm
(2.9528
-
2.9540
in.)
Bore out
-
of
-
round
-
max.
0.02
mm
(0.0008
in.)
Cylinder block
warpage--max.
0.07
mm
(0.0028
in.)
Piston diameter
Standard
74.910
-
74.940
mm
(2.9492
-
2.9504
in.)
Wear limit
74.850
mm max.
(2.9468
in.)
Piston top clearance
0.68
-
0.88
mm
(0.027
-
0.035
in.)
Piston ring side clearance
Top ring
0.065
-
0.100
mm
(0.0026
-
0.0039
in.)
Second ring
0.035
-
0.070
mm
(0.001 4
-
0.0028
in.)
Oil ring
0.020
-
0.055
mm
(0.0008
-
0.0022
in.)
Ring end gap (all rings)
0.20
-
0.40
mm
(0.008
-
0.016
in.)
Piston pin diameter
19.991
-
20.000
mm
(0.7870
-
0.7874
in.)
Piston pin hole diameter
In piston
19.995
-
20.008
mm
(0.7872
-
0.7877
in.)
In rod
20.000
mm
(0.7874
in.)
Piston pin clearance
In rod
0.025
-
0.047
mm
(0.0010-0.001 9
in.)
In piston
0.005
mm tight
-
0.017 mm loose
(0.0002 in. tight
-
0.0007
in. loose)
Piston ring width
Top
81
second ring
1.97
-
1.99
mm
(0.0776
-
0.0783
in.)
Oil control ring
3.97
-
3.99
mm
(0.1563
-
0.1571
in.)
Crankshaft main
journal'diameter
Timing gear end
43.950
-
43.964
mm
(1.7303
-
1.7309
in.)
Flywheel end
59.950-59.964
mm
(2.3602
-
2.3608
in.)
Journal out
-
of
-
round
-
max.
0.01
mm
(0.0004
in.)
Crankshaft end play
0.06
-
0.19
mm
(0.0024
-
0.0075
in.)
Crankshaft runout
-
max.
0.1 5
mm
(0.006
in.)
Main bearing clearance
Timing gear end
0.036
-
0.092
mm
(0.0014
-
0.0036
in.)
Flywheel end
0.036
-
0.095
mm
(0.0014
-
0.0037
in.)
Crankshaft thrust
bearing--inin.
Front
2.75
mm
(0.108
in.)
Inner
2.25
mm
(0.089
in.)
Crankpin diameter
39.950
-
39.964
mm
(1.5728-1.5734
in.)
Journal out
-
of
-
round
-
max.
0.01
mm
(0.0004
in.)
Crankpin bearing clearance
0.028
-
0.086
mm
(0.001 1
-
0.0034
in.)
Connecting rod side clearance
0.2
-
0.4
mm
(0.008
-
0.016
in.)
Cylinder head
warpage--max.
0.07
mm
(0.003
in.)
lcontinuedl
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