Piper Comanche PA-24 Service Manual page 506

...
PIPER COMANCHE SERVICE MANUAL
,
"
"
FIGURE
7A·23.
REMOVING SEIZED SPARK PLUGS
NOTE
Torque iIIc1icatiDtI banclJe sbollid not be used for spark pi", removal
because of the greatCt torque rcquireme"t.
c. Place spark plup in a tray
w,
will identify their position ill the engine .. soon .. they ue
removed.
NOTE
Spark plup shollid not be used if they have been dtopped.
d. Removal of seized spark plup in the cylindCt may be accomplished by application of liquid carbon
dioxide by a Conical metal funnel adaptCt with a bole
at
tile apex Just
lazJ<:
eno",h to accommodarc 'he
funnel of a C02 bonle. (Refer to Figure 7A·23.) When a seized spark pi", cannot be removed by normal
meaIls. the funnel adaptCt is placed OVCt and around the spark plug. Place the funnel of the C02 bottle
inside the funnel .dapter and rele ... the carbon dioxide to chill and contract the spark plug. Break 'he
spark plug loose with. wrench. A warm cylindct head
at
the time the carbon dioxide is .pplied will .Id
IR
the removal of an excessively seized. plug.
e. Do no, allow foreign objectS
'0
cnrcr the spark plug hole.
POWER PLANT
ISSUED: 8/18n2
2
E4