The Oldsmobile 350 or the Rocket 350 was a 350-cubic-inch V-8 engine in full-size Oldsmobile cars from 1968 to 1980. Knowing the firing order of the engine when changing spark plugs and wires is a vital part of its maintenance.
Location of Cylinders
When you are facing the engine, the left (passenger's side) bank of cylinders is numbered 2-4-6-8. The right (driver's side) bank is numbered 1-3-5-7.
The firing order for this engine is 1-8-4-3-6-5-7-2. The distributor turns clockwise.
Spark Plug Gap
Depending on the year and model of your vehicle, the spark plug gap is .030 inch to .045 inch. You must look this up in the factory service manual for your particular vehicle.
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