28
Chapter
l-Gener
al Engine Overhaul, Inspection,
and
Repair
fig.
40-Cylinder
80re
Measurement-Typical
mine
the
proper oversize.
If
this
cylinder
will
not
clean
up
when bored for
the
maximum
oversize
piston rec-
ommended,
the
block
should
be
replaced.
Bor
e
the
cylin-
der
to
withi
n
approximately
0.0015
inch
of
the
required
oversize diameter.
Thi
s will allow enough
stock
for the
final
ste
p
of
honing
the
bores
so
the
correct surface
finish a
nd
pattern
are
obtained
. Use a
number
220-280
grit hone for this operation.
CAUTION:
Thoroughl
y
clean
th
e
block
to
remove
all
particles
after
the
bo
ring
and
honing
operations,
th
en
coat
the
bores
with
oil.
(4)
CYLINDER BORE
"GLAZE"
REMOVAL.
Whene
ve
r piston rings are installed in a used. cylinder
r
emove
the
"g
laze"
on
the
bore
to
aid in ring seating.
Tak
e all necessa
ry
precautions
to
catch
the
grit.
Pass
...
CYLINDER
BLOCK
COR
E
PLUG
S
6600
fig.
41-Expansion
-Type Plug
Removal-Typical
TOOI-T~~[~;~g~;~;!~C'ENG""S)~
X.
~
(223 AND 272
CUBIC
INCH
Tool-
T52T-6266·C1D
(302 AND 332
CUB
IC INCH
ENGINES)
CYLINDER
BLOCK
CORE
P
LU
GS
fig.
42-Expansion-Type
Plug
Installation-Typical
a
hone
or
glaze
removing
tool
through
the
cylinder
bore
a few
times
.
Do
not
hone
more than enough
to
rough
up
the
finish.
Thoroughly
clean
the
cylinder
Dore
and
block
af
ter glaze removal,
then
oil
the
bores.
h.
Pistons,
Pins,
and
Rings.
(1)
CLEANING AND INSPECTION.
Remo
ve
the
carbon deposits from
the
piston. Clean the piston ring
grooves
with
a
ring
groove
clea
ner
(fig.
43).
Make
sure
the
oil
ring
slots
(or
holes)
are
clean.
CAUTION:
Do
not
use
a
caustic
cleaning
solution
or
a
wire
brush.
Inspect
pistons
f
or
fr
actures
at
the
ring
lands, skirt,
and
pin
bosses,
and
for scuffed
or
scored
skirts. Spongy,
eroded areas
ne
ar
the
edge
of
the
piston
top
are usually
caused
by detonation, or pre-ignition. A shi
ny
surface
on
the
" thrust surface
of
the piston, offset from
the
center-
line
between
the
piston pin holes, can
be be
caused
by
Groove
Cleaning T
ool
TS2L.6110·AAD
Fig .
43-Cfean;ng
Ring
Grooves
6097
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