5) Remove cap and using a scale on gaging plastic envelope,
measure gaging plastic (1) width at the widest point (clearance).
If clearance exceeds its limit, use a new standard size bearing
and remeasure clearance.
6) If clearance can not be brought to within its limit even by using
a new standard size bearing, replace crankshaft or regrind
crankpin to undersize as follows.
– Install 0.25 mm undersize bearing to connecting rod big end.
– Measure bore diameter of connecting rod big end.
– Regrind crankpin to following finished diameter.
– Confirm that bearing clearance is within above standard val-
ue.
Finished
crankpin
dia.
=
Measured big end
bore dia. (including
undersize bearing)
0.030 mm
(0.0012 in.)
–
ASSEMBLY
NOTE:
Two sizes of piston are available as standard size spare part
so as to ensure proper piston-to-cylinder clearance. When
installing a standard size piston, make sure to match piston
with cylinder as follows.
a) Each piston has painted color red or blue (2) as shown. It repre-
sents outer diameter of piston.
b) There are paints (1) on the cylinder block as shown. The color
(red or blue) of each paint represents cylinder bore diameter.
The first paint from crank pulley side represents inner diameter
of No.1 cylinder, the second paint of No.2 cylinder, the third paint
of No.3 cylinder.
c) Painted color on piston and cylinder block should correspond.
That is, install blue color painted piston to cylinder which is iden-
tified with blue paint and a red color painted piston to cylinder
with red paint.
6A1-48
ENGINE MECHANICAL (F8D ENGINE)
Item
Standard
Limit
Bearing
clearance
0.020 – 0.040 mm
(0.0008 – 0.0016 in.)
0.065 mm
(0.0026 in.)
Piston
Cylinder
Piston to cylinder
Outer diameter
Color
(paint)
Bore diameter
Piston-to-cylinder
clearance
68.475 – 68.485 mm
(2.6959 – 2.6962 in.)
Red
68.51 – 68.52 mm
(2.6973 – 2.6976 in.)
0.02 – 0.04 mm
(0.0008 –
0.0015 in.)
68.465 – 68.475 mm
(2.6955 – 2.6959 in.)
Blue
68.50 – 68.51 mm
(2.6968 – 2.6973 in.)
0.02 – 0.04 mm
(0.0008 –
0.0015 in.)
