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28
Chapter
l-General
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.
Bore
the
cylin-
der to
within
approximately
0.0015
inch of the required
oversize
diameter.
This
will allow
enough stock
for
the
final
step
of
honing
the bores so the
correct surface
finish
and pattern
are
obtained.
Use
a
number
220-280
grit
hone
for this
operation.
CAUTION:
Thoroughly
clean
th
e
block to remove all
particles after
the
boring
and honing
operations,
then
coat
the bores
with oil.
(4)
CYLINDER BORE
"GLAZE"
REMOVAL.
Whenever piston
rings are
installed in
a
used.
cylinder
remove
the
"glaze"
on
the bore
to aid in ring seating.
Take
all necessary
precautions
to
catch the grit.
Pass
...
CYLINDER BLOCK
CORE
PLUGS
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 CUBIC
INCH
ENGINES)
CYLINDER BLOCK
CORE
PLUGS
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
after glaze
removal,
then
oil the bores.
h.
Pistons,
Pins, and Rings.
(1)
CLEANING AND
INSPECTION.
Remove
the
carbon
deposits
from
the piston. Clean
the
piston ring
grooves with a
ring
groove
cleaner
(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
for fractures at the
ring lands,
skirt,
and pin
bosses, and for
scuffed
or scored skirts. Spongy,
eroded areas near
the
edge of the
piston top
are
usually
caused
by
detonation,
or pre-ignition.
A shiny
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
Tool
TS2L.6110·AAD
Fig
.
43-Cfean;ng Ring Grooves
6097
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