1946-64 Imperial Tune-up Specifications

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IMPERIAL

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
Year	Engine or Car Model	Spark Plug Gap	Point Gap	Dwell Angle	Firing Order	Ignition Timing (BTDC or Mark)	Intake	Exhaust
1946-48	All	.025	.017	27-30	16258374	2°	.008H	.010H
1949-50	All	.035	.017	27-30	16258374	"0"	.008H 3	.010H 3
1951-54	All	.035	.017	1	18436572 2	"0"	Zero	Zero
1955	All	.035	.017	1	18436572 2	6°	Zero	Zero
1956	All	.035	.017	4	18436572 2	4°	Zero	Zero
1957	All	.035	.017	5	18436572 2	6°	Zero	Zero
1958	All	.035	.017	5	18436572 2	6°	.060 -.210 10
1959	All	.035	.017	12	18436572 2	10°	.060 -.210 10
1960	All	.035	.017	27-32	18436572 2	10°	.060 -.210 10
1961-63	All	.035	.017	27-32	18436572 2	10° 15	.060 -.210 10
1964	All	.035	.017	28-33	18436572 2	10° 15	.060 -.210 10

1 - Each set of points 26-28°, total dwell
 both sets 32-36°
    
2 -  Cylinders numbering front to rear: 
Left 1357 Right 2468

3 - Zero lash with hydraulic lifters

4 - Each set of points 29-32°, total dwell both
sets 32-36°

5 - Each set of points 29-32°, total dwell both
sets 36-39°

10 - With lifter collapsed

12 - Each set of points 27-32°, total dwell both
sets 34-40°

15 - Whenever idle speed or ignition timing is
adjusted, vacuum line to brake release
mechanism must be disconnected and plugged
to prevent parking brake from releasing when
selector lever is moved to drive. Set idle speed with
A/C compressor  operating.