13
Engine,
Crankshaft,
Pistons
Cylinders and pistons
are
matched in size groups shown in the chart below.
Size
Group
Color Code Cylinder ,Dia.
Matching Piston
Dia.
mm
mm
Standard
size
Nominal
dia.
94.0
mm
. -
1st oversize
Nominal
dia.
mm
2nd oversize
Nominal
dia.
mm
If
the
measurement reveals that
clearance
between piston and cylinder
is
close to
0.2
mm,
replace
piston and cylinder with a set
of
same
size
group (standard or oversize). The weight
of
pistons in a
given engine should not differ more than
10
g.
Damaged pistons from cylinders which
show
traces
of
wear should not be replaced
alone.
However,
if
the
given cylinder
shows
no traces
of
wear, its piston
may
be
replaced alone with one
of
the respective size group.
To
maintain
normal compression ratio, bored out cylinders
are
fitted with oversize pistons
of
lower
height (measured between piston pin bore and piston crown).
CAUTION
Only cylinders and pistons of one given size group may
be
installed in a given engine.
Engine oil consumption, together with wear,
is
a determining factor in replacing pistons and cylinders.
If
the
oil consumption exceeds
1.5
ltr/gt
per
600
mi. it
is
generally an indication
for
the need
of
an
engine
o'lerhaul.
PISTON
AND
CYLINDER
INSTALLATION
Piston rings, removing and installing
Cylinder on piston, installing
13-
6
Checking Cylinder
to
Piston.
Clearance
Printed in Germany
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