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CHAMPION RACING GAP TOOL (#CT-408) DISCONTINUED TYPES
Gap setting may be customized on Champion retracted Present Type Discontinued Types
gap (“R” suffix) plugs. This tool will open or close the ground J-6J J-67J
electrode to preferred tolerances. Precise settings should J-4J J-64J
be made and care taken not to “jockey” the electrode back J-63Y J-66Y
and forth, as such practice can loosen the electrode. J-62R J-63-R, J-63T, J-10, J-3, K-3
Care should also be taken not to open gaps so wide that J-61Y
the ground electrode projects beyond the threads of the plug J-60R J-64Y
J-61R
shell. This will invite stripped threads in the head.
J-57R J.-58R, J-59T, J-56T, JA-11, J-2, K-2
J-54R J-55T, J-53T
K-54R K-55R, R-ll, R-11S, R-11A, K-53T, R-
K-57R K-58R, R-1S, R-2A, R-1A, R-l, R-2S
K-60R K-61R, R-7, RJ-11
L-7 L-10S
L-54R L-55R, L-55T, LA-14, L-53T
L-57R L-58R, L-59T, L-56T, LA-11
L-62R L-63R, LA-10
L-87R* L-57R, J-57R / Discontinued for
L-84R* L-54R, J-54Rf 2-cycle applications
TO OPEN (WIDEN) GAP L-83R* L-53T, L-52T, J-53T
1. Hold gap tool with V-wedge turnbuckle face up... back *When used with .135" gasket (Champion P/N N-677),
out turnbuckle counter-clockwise. plus regular gasket, will fit %" depth applications.
2. Place plug firing end flush on top of tool with its center z NA-10
electrode in slot, drill pin hole of plug facing v-wedge. z c x j N-52T, NA-19
3. Turn V-wedge turnbuckle handle clockwise (slowly) to ar­ z N-53T, N-55R, N-55T, NA-14
rive at desired gap. Do not back the side electrode beyond z co lo in m lo <o cr or tr >- rr N-58R, NA-12
plug threaded surface, as it will strip engine threads upon z o N-61Y, N-62Y
installation. z c\j N-63R
LO LO LO LO ■ n m -n ~n
F-55T, F-53T
F-58R
F-61R
r - o
F-63R
cxi
o r o r o i o r
CHAMPION GASKETS
Part No. Thickness
18mm A-674 Solid .040
A-674 Solid .060
A-675 Solid .080
TO NARROW (CLOSE) GAP A-676 Folded .065/.050
1. Hold gap tool with side marked “Champion” face up. A-678 Thread-On .075/.055
2. Turn top turnbuckle handle counter-clockwise to back out M-674 Solid .080
the end pin. M-674 SP. Solid .150
3. Place spark plug firing end at narrow end of the heart- M-674X2 Solid .100
shaped'opening of gap tool with plug drill pin hole facing 14mm N-674 (wide) Solid .060
turnbuckle pin. Turn turnbuckle clockwise until turnbuckle N-675 Solid .060
end pin contacts spark plug drill hole. N-676 Folded .070/.052
4. Turn turnbuckle slowly to arrive at selected gap setting. N-677 Solid .135
N-678 Thread-On .070/.052
SPARK PLUG TORQUE SETTINGS N-673X1 Solid .080
N-673X2 Solid .096
Although of less importance in street use, proper plug
torque is essential in racing. Over-torquing can distort or 12mm P-674 Solid .057
impair spark plug internal seals causing overheating or P-678 Thread-On .070/.072
physical failure. Threads in aluminum heads can be stripped. 10mm Y-674 Solid .045
10mm, 12mm, and taper seat plugs require precise torque Y-678 Thread-On .055/.045
settings.
It is wise practice to monitor your plug installation with PM-1 SPARK PLUG VIEWER
a torque wrench ... know how many full, half, or quarter
turns are required to arrive at the proper setting. If you don’t Permits close examination of spark plugs over the entire
own a torque wrench ... borrow one to get the “feel.” length of the insulator nose ... checks condition of electrode
sparking surfaces (a must for razor-sharp tuning)... also
handy for injector nozzle and carburetor jet inspection.
PLUG INSTALLATION TORQUE LIMITS (FT/LB)
10MM 7 8 CT-451 PLUG-MASTER II
12MM 10 10
A flex-handle ratchet wrench makes plug installation eas­
14MM 14 18 ier around exhaust headers on race engines. The “Twirl-
Twist” handle and full 90° pivot ratchet head allow flexible
18MM 18 20 TAPER SEAT
PLUGS positioning to reach plugs in almost any location. When
ALUMINUM CAST IRON REQUIRE coupled to Champion’s CT-407 magnetic socket, plug in­
HEADS HEADS 1/2 TORQUE
stallation and removal is fast and simple.
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