BUICK

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
Year	Engine Car Model	Spark Plug Gap	Point Gap	Dwell Angle	Firing Order	Ignition Timing (BTDC or Mark)	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
1953	All	.032	.016	21-30	12784563 2	"ADV" Flywheel	Zero	Zero
1954	All	.032	.016	21-30	12784563 2	5°	Zero	Zero
1955	All	.032	.016	26-33	12784563 2	5°	Zero	Zero
1956	All	.032	.016	26-33	12784563 2	5°	Zero	Zero
1957	All	.032	3	26-33	12784563 2	5°	Zero	Zero
1958	All	.032	3	30	12784563 2	4	Zero	Zero
1959	364, 401 Std.	.032	.016 3	30	12784563 2	5°	Zero	Zero
1959	364, 401 Auto	.032	.016 3	30	12784563 2	12°	Zero	Zero
1960	364, 401 Std.	.032	.016 3	30	12784563 2	5°	Zero	Zero
1960	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	5°	Zero	Zero
	V8 215	.035	.016 3	30	18436572 6	5°	Zero	Zero
1963	401, 425 Std.	.035	.016 3	30	12784563 2	5°	Zero	Zero
	401, 425 Auto	.035	.016 3	30	12784563 2	12°	Zero	Zero
	V6 198	.035	.016 3	30	165432 5	5°	Zero	Zero
	V8 215	.035	.016 3	30	18436572 6	5°	Zero	Zero
1964	V6 225	.035	.016 3	30	165432 5	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.