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WILLYS-JEEP
1946-64 Tune-up Specifications
Year
Engine or 
Car Model
Spark 
Plug Gap
Point
Gap
Dwell
Angle
Firing
Order
Ignition Timing 
(BTDC or Mark)
Valve Lash
Intake
Exhaust
1946-48
L4 Sta. Wagon
.030
.020
41
1342
Flywheel
.016C
.016C
L6 Sta. Wagon
.030
.020
35
153624
.016C
.016C
1949-51
L4 Sta. Wagon
.030
.020
41
1342
Flywheel
.016C
.016C
L6 Sta. Wagon
.030
.020
39
153624
.016C
.016C
L4 Jeepster
.030
.020
47
1342
 Flywheel
.016C
.016C
L6 Jeepster
.030
.020
39
153624
.016C
.016C
1952
F4 Sta. Wagon
.030
.020
47
1342
Flywheel
.018C
.016C
L6 Sta. Wagon
.030
.020
39
153624
.016C
.016C
L6 Aero lark
.030
.020
39
153624
.016C
.016C
F6 Aero Wing, Ace
.030
.020
39
153624
.018C
.016C
1953-57
F4 Jeep
.030
.020
47
1342
 Flywheel
.018C
.016C
F4 Sta. Wagon
.030
.020
47
1342
Flywheel
.018C
.016C
L6 Sta. Wagon
.030
.016
38-45
153624
.016C
.016C
1956-57
L4 Jeep Dispatcher
.030
.020
47
1342
 Flywheel
.016C
.016C
1958
F-Head 4
.030
.020
42
1342
 Pulley
.018C
1
6-226
.030
.020
39
153624
.014C
.014C
L-Head 4
.030
.020
42
1342
 Flywheel
.016C
.016C
1959-62
F-Head 4-134
.030
.020
42
1342
 Pulley
.018C
1
L-Head 4-134
.030
.020
42
1342
 Flywheel
.016C
.016C
6-226
.030
.020
39
153624
.014C
.014C
1963-64
F-Head 4-134
.030
.020
42
1342
 Pulley
.018C
1
L-Head 4-134
.030
.020
42
1342
 Flywheel
.016C
.016C
6-226
.030
.020
39
153624
.014C
.014C
6-230
.030
.020
39
153624
.006C
.008C
1 - Easton face valve .012C,
Thompson Roto valve .016C