PIPER COMANCHE SERVICE
MANUAL
FIGURE
78·15.
REMOVAL
OF
SEIZED
SPARK
PLUG
NOTE
Torque indie.ring IwIdle should
not
be used for
.puk
plug removal
because
of
the greater torque requlrement.
c.
Place spark plug!
in
a
my
that will identify their position in the engine
a.s
500n
as
they are
removed.
NOTE
Spuk
plugs should not
be
usc:d
if they hive been dropped.
d.
Removal
of
selZed
spuk
plugs
in
the cylinder may be accomplished by application of liquid carbon
dioxide
by a Conical metal funnel adapter with a hole a.t the apcx just large enough
to
accommodate the
funnel
of
•
C02
boccie. (Refer to Figure 78-15 ) When
...
ized
,puk
plug eilUlot
be
removed by
normil
means. the funnel adapter
is
placed over and a.round the
spuk
plug. Place
the:
funnel
of
the
C02
bottle
inside
the
funnel
adapter
and
rcic3.5c
me carbon diOXIde
[0
chill l.nd contta.ct the spark plug. Break
the:
spuk
plug
loose::
with
a wrench A warm cylinder head
at
the
time
the
carbon
dioXlde
is
applied wiil
jud
in
the
removal
of
an excessIVely seized plug
e.
Do
not
allow forclgn object'S
to
enteT
the
spark
plug hole.
2F22
POWER
PLANT
ISSUED:
8/18172
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