PIPER CHEROKEE
SIX SERVICE MANUAL
234
Figure 7A-53. Removing Spark Plug Frozen to Bushing
not apply
to plug removal and
sufficient torque
must be used to
unscrew the plug.
The
higher torque
in removal is not
as detrimental as
in installation, since
it cannot stretch
the
threaded
section. It does, however,
impose a
shearing load on
this section and may,
if
sufficiently
severe, produce a failure
in this location.
NOTE
Torque
indicating handle should
not be used for spark plug
removal
because of the greater
torque requirement.
c. Place spark
plugs in a tray
that will identify
their position in the
engine as soon
as
they are removed.
NOTE
Spark plugs
should not be used
if they have been dropped.
d.
Removal of seized spark plugs in the
cylinder may be accomplished by
application
of liquid carbon
dioxide by
a conical metal funnel
adapter with a hole
at the apex just
large
enough to accommodate the funnel
of a CO2 bottle. (Refer to Figure 7A-53.)
When a seized
spark
plug cannot be removed
by normal
means, the funnel
adapter is placed
over and
around
the spark plug. Place
the funnel of
the CO2 bottle inside
the funnel adapter
and
release the carbon dioxide
to chill and contract the spark plug.
Break the spark plug loose
with
a wrench. A warm
cylinder head at
the time the carbon
dioxide is applied
will aid in
the
removal of an excessively
seized
plug.
e. Do not allow foreign
objects to enter the
spark plug hole.
POWER
PLANT
Added:
7/28/75
218
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