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1946-64 Tune-up Specifications

 
Year Engine Car Model Spark Plug Gap Point Gap Dwell Angle Firing Order

Ignition Timing (BTDC or Mark)

Valve Lash
Intake Exhaust
1946 -49 All .025 .016 21-30 16258374 "ADV"
Flywheel
.015H
1
.015H
1
1950 -52 All .025 .016 21-30 16258374 "ADV"
Flywheel
.015H
1
.015H
1
1953 Series 40 .025 .016 21-30 16258374 "ADV
" Flywheel
.015H .015H
All .032 .016 21-30 12784563
2
"ADV"
Flywheel
Zero Zero
1954 All .032 .016 21-30 12784563
2
Zero Zero
1955 All .032 .016 26-33 12784563
2
Zero Zero
1956 All .032 .016 26-33 12784563
2
Zero Zero
1957 All .032
3
26-33 12784563
2
Zero Zero
1958 All .032
3
30 12784563
2
4
Zero Zero
1959 364, 401
Std.
.032 .016
3
30 12784563
2
Zero Zero
364, 401
Auto
.032 .016
3
30 12784563
2
12° Zero Zero
1960 364, 401
Std.
.032 .016
3
30 12784563
2
Zero Zero
364, 401
Auto
.032 .016
3
30 12784563
2
12° Zero Zero
1961 -62 364, 401 .032 .016
3
30 12784563
2
12° Zero Zero
V6 198 .035 .016
3
30 165432
5
Zero Zero
V8 215 .035 .016
3
30 18436572
6
Zero Zero
1963 401, 425
Std.
.035 .016
3
30 12784563
2
Zero Zero
401, 425
Auto
.035 .016
3
30 12784563
2
12° Zero Zero
V6 198 .035 .016
3
30 165432
5
Zero Zero
V8 215 .035 .016
3
30 18436572
6
Zero Zero
1964 V6 225 .035 .016
3
30 165432
5
Zero Zero
V8 300 Special .035 .016
3
30 18436572
6
2.5° Zero Zero
V8 300 Lesabre .035 .016
3
30 18436572
6
2.5° Zero Zero
V8 401, 425 .035 .016
3
30 12784563
2
2.5°
7
Zero Zero

1 - With mechanical valve lifters.Zero with Hydraulic lifters.

2 - Cylinders numbering front to rear: Right bank 1357 Left bank 2468

3 - Turn adjusting screw clockwise until engine begins to misfire, then back 1/2 turn

4 - Std. 5° Auto 12°

5 - Cylinders numbering front to rear:

Right bank 246

Left bank 135

6 - Cylinders numbering front to rear:

Right bank 2468

Left bank 1357

7 - 12° for V8 425 with 2 carbs./ Auto trans.