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NASH
1946-57 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
 
"600" 6
 
.025
 
.020
 
35-38
 153624 
IGN
 
.015H
 
.015H
Ambassador 
.025
 
.020
 
35-38
 
153624
 
IGN
 
.015H
 
.015H
 
1949
 
"600" 6
 
.030
 
.022
 
31-37
 153624 
IGN
 
.015H
 
.015H
Ambassador 
.025
 
.022
 
31-37
 
153624
 
IGN
 
.015H
 
.015H
 
1950
 
Rambler
 
.030
 
.022
 
31-37
 153624 
TDC
 
.016C
 
.018C
Statesman 
.030
 
.022
 
31-37
 
153624
 
TDC
 
.016C
 
.018C
 
Ambassador
 
.030
 
.022
 
31-37
 153624 
TDC
 
.012H
 
.016H
 
1951
 
Rambler
 
.030
 
.022
 
31-37
 153624 
TDC
 
.016C
 
.018C
Statesman 
.030
 
.022
 
31-37
 
153624
 
TDC
 
.016C
 
.018C
Ambassador 
.030
 
.022
 
31-37
 
153624
 
TDC
 
.012H
 
.016H
 
1952-54
 
Rambler
 
.030
 
.022
 
31-37
 153624 
4° 3 
.016C
 
.018C
Statesman 
.030
 
.022
 
31-37
 
153624
 
4° 3 
.016C
 
.018C
Ambassador 
.030
 
.022
 
31-37
 
153624
 
TDC
 
.012H
 
.016H
 
1955
 
Statesman
 
.030
 
.022
 
31
 153624 
4° 3 
.016C
 
.018C
Ambassador 6 
.030
 
.016
 
38-45
 
153624
 
4° 3 
.012H
 
.016H
Ambassador V8 
.035
 
.017
 
38
 
18436572 1
 
5° 
Zero
 
Zero
 
1956
 
Statesman 6
 
.030
 
.016
 
28-35
 153624 
5° 
.012H
 
.016H
Amb. Spec V8 
.035
 
.016
 
26-33
 
18436572 1
 
5°
 
Zero
 
Zero
Ambassador 6 
.030
 
.020
 
39
 
153624
 
4° 3
 
.012H
 
.016H
Ambassador V8 
.035
 
.017
 
31
 
18436572 1
 
5°
 
Zero
 
Zero
 
1957
 
Ambassador V8
 
.035
 
.016
 
30
 18436572 1 
5°
 
Zero
 
Zero
 
1 - Cylinders numbering front to rear:
 Right bank 1357  left bank 2468              


3- After top dead center