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Oldsmobile Tune-up Specificationsline.gif (831 bytes)

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CAUTION:
General adoption of anti-pollution laws has changed the design of almost all car engine production to effectively reduce crankcase emission and terminal exhaust products. It has been necessary to adopt stricter tune-up rules, especially timing and idle speed procedures. Both of these values are peculiar to the engine and to its application, rather than to the engine alone. With this in mind, car manufacturers supply idle speed data for the engine and application involved. This information is clearly displayed in the engine compartment of each vehicle.

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Oldsmobile Firing Order
NOTE: This graphic shows the correct firing order, but the position of the plug wires on the cap vary. Please note the position of the wires on your car before removal.
Year Model Spark Plugs Distributor Ignition Timing
(A)		 Cranking Comp. Pressure (PSI) Intake Valve Opens (Deg.) Fuel Pump Pressure Idle Speed (RPM) (B)
Type Gap Point Dwell Point Gap
1966 F-85, OHV 6, 1-BBL 46N .035 32 .019 5B 130 62B 7 1/2 - 8 1/2 500
F-85, V8, 2-BBL 45S .030 30 .016 7 1/2B 180 22B 7 1/2 - 8 1/2 550
F-85, V8, 4 BBL 44S .030 30 .016 7 1/2B 180 22B 6 550
F-85, V8, 442, 4-BBL 44S .030 30 .016 7 1/2B 190 21B 7 3/4 - 9 600
Jetstar 88, 2-BBL 44S .030 30 .016 7 1/2B 180 24B 7 3/4 - 9 550
Jetstar 88, 4-BBL 44S .030 30 .016 7 1/2B 180 24B 7 3/4 - 9 550
Dynamic 88, 2-BBL 44S .030 30 .016 7 1/2B 170 21B 7 3/4 - 9 500
Dynamic 88, 4-BBL 44S .030 30 .016 7 1/2B 180 21B 7 3/4 - 9 550
Delta 88, 2-BBL 44S .030 30 .016 7 1/2B 170 21B 7 3/4 - 9 600
Delta 88, 4-BBL 44S .030 30 .016 7 1/2B 180 21B 7 3/4 - 9 600
Starfire, 4-BBL 44S .030 30 .016 7 1/2B 180 21B 7 3/4 - 9 600
1967 L6 - 250, 1-BBL (155 HP) 46N .035 32 .016 5B 130 62B 4 1/2 (3) 500
V8 - 330, 2-BBL (250 HP) 45S .030 30 .016 7 1/2B 180 12B (1) 8 550
V8 - 330, 2-BBL (260 HP) 44S .030 30 .016 7 1/2B 180 21B 8 550
V8 - 330, 4-BBL (310 HP) 44S .030 30 .016 7 1/2B 180 21B 8 550
V8 - 330, 4- BBL (320 HP) 44S .030 30 .016 7 1/2B 180 21B 8 550
V8 - 400, 4-4-2 (350 HP) 44S .030 30 .016 7 1/2B 180 30B (2) 7 600
V8 - 425, 2-BBL (300 HP) 44S .030 30 .016 5B 160 21B 8 550
V8 - 425, 2-BBL (310 HP) 44S .030 30 .016 7 1/2B 180 21B 8 550
V8 - 425, 4-BBL (365 HP) 44S .030 30 .016 7 1/2B 180 21B 8 550
V8 - 425, 4-BBL (375 HP) 44S .030 30 .016 7 1/2B 190 21B 8 550
1968 L6 - 250, M.T. (155 HP) 46N .030 32 .016 4B 130 16B 3 1/2 - 4 1/2 650
L6 - 250, A.T. (155 HP) 46N .030 32 .016 6B 130 16B 3 1/2 - 4 1/2 550
V8 - 350, 2-BBL (250 HP) 45S .030 30 .016 5B 160 16B 5 1/2 - 7 650 (4)
V8 - 350, 4-BBL (300 HP) 44S .030 30 .016 7 1/2B 180 16B 5 1/2 - 7 650 (4)
V8 - 350, 4-BBL (310 HP) 44S .030 30 .016 7 1/2B 180 16B 5 1/2 - 7 650 (4)
V8 - 400, 2-BBL (290 HP) 44S .030 30 .016 TDC 180 21B 5 1/2 - 7 725
V8 - 400, 4-BBL (350 HP) 44S .030 30 .016 TDC 180 30B 5 1/2 - 7 725
V8 - 400, 4-BBL (360 HP) 44S .030 30 .016 TDC 180 30B 5 1/2 - 7 725
V8 - 455, 2-BBL (310 HP) 45S .030 30 .016 10B 180 20B 5 1/2 - 7 550
V8 - 455, 2-BBL (320 HP) 45S .030 30 .016 10B 180 20B 5 1/2 - 7 550
V8 - 455, 4-BBL (365 HP) 45S .030 30 .016 10B 190 20B 5 1/2 - 7 550
1969 L6 - 250, M.T. (155 HP) 46N .030 35 .016 TDC 130 16B 3 1/2 - 4 700
L6 - 250, A.T. (155 HP) 46N .030 35 .016 4B 130 16B 3 1/2 - 4 500
V8 - 350, 2-BBL (250 HP) 45S .030 30 .016 6B 180 16B 5 1/2 - 7 850
V8 - 350, 4-BBL (310 HP) 45S .030 30 .016 8B 180 16B 5 1/2 - 7 850
V8 - 350, 4-BBL (325 HP) 44S .030 30 .016 12B 180 16B 5 1/2 - 7 850
V8 - 400, 4-BBL (325 HP) 44S .030 30 .016 8B (5) 180 16B 5 - 8 850
V8 - 400, 4-BBL (350 HP) 44S .030 30 .016 8B (5) 180 16B 5 - 8 850
V8 - 400, 4-BBL (360 HP) 44S .030 30 .016 8B (5) 180 16B 5 - 8 850
V8 - 455, 2-BBL (310 HP) 45S .030 30 .016 6B 180 16B 5 - 8 850
V8 - 455, 4-BBL (365 HP) 44S .030 30 .016 8B 180 16B 5 - 8 850
V8 - 455, 4-BBL (390 HP) 44S .030 30 .016 10B 190 16B 5 - 8 850
Notes:
All valve tappet clearances (hot), intake and exhaust: Zero
M.T. - manual transmission
A.T. - automatic transmission
B - Before top dead center
TDC - top dead center
(A) With vacuum advance disconnected. Note: These settings are only approximate. Engine design, altitude, temperature, fuel octane rating and the condition of the individual engine are all factors which can influence timing. The limiting advance factor must, therefore, be the "knock point" of the individual engine.
(B) With manual transmission in N and automatic in D. If equipped with air conditioning, add 50 RPM		 (1) Vista Cruiser - 21B
(2) Auto. transmission - 21B
(3) If equipped with exhaust emission control: 5 1/2 - 7
(4) 550 if equipped with automatic transmission
(5) Std. transmission - 2B

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