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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
Intake
Exhaust
1946-48
All
.025 .017 27-30 16258374
.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 Zero Zero
1956
All
.035 .017
4
18436572 2 Zero Zero
1957
All
.035 .017
5
18436572 2 Zero Zero
1958
All
.035
.017
5
18436572 2
.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.