Oldsmobile 350 Firing Order and Cylinder Diagram
Oldsmobile 350 Firing Order and Cylinder Diagram with 1-8-4-3-6-5-7-2, physical numbering, identification cautions and routing procedure.
The 350 Rocket V8 firing order is 1-8-4-3-6-5-7-2. Driver bank is 1-3-5-7 and passenger bank is 2-4-6-8, front to rear.
The 350 Rocket V8 firing order is 1-8-4-3-6-5-7-2. Driver bank is 1-3-5-7 and passenger bank is 2-4-6-8, front to rear. A firing order is the sequence in which the cylinders begin their power strokes. It is not the same thing as cylinder numbering, distributor-cap clock position, or ignition-coil connector order. Confusing those references can create a no-start, violent backfire, dead cylinders, or a diagnostic trail that looks like a fuel or mechanical problem.
Use the verified order only after identifying the engine family and camshaft. Classic engines can accept camshaft swaps that change the required sequence, while modern coil-on-plug engines have no distributor cap to route. The table, bank diagram, and procedure below keep those concepts separate and show how to confirm No. 1 on compression before moving any wires.
Interactive Oldsmobile 350 Rocket V8 firing-order diagram
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Select each cylinder to walk through the firing order. Cylinder-bank numbering and distributor direction must match the identified engine family.
Oldsmobile 350 Firing Order
| APPLICATION / ITEM | SPECIFICATION | NOTES |
|---|---|---|
| Firing order | 1-8-4-3-6-5-7-2 | Confirm exact engine |
| Physical numbering | Driver bank is 1-3-5-7 and passenger bank is 2-4-6-8, front to rear. | Orient by the timing/front end |
The traditional Oldsmobile distributor routes counterclockwise. GM divisions produced different 350 engines, so casting identity matters even when combustion order matches.
Which 350 Rocket V8 firing order applies?
Covers Oldsmobile-built 350 V8 engines; it does not cover Chevrolet, Buick or Pontiac 350 swaps. This distinction matters because the engine can look nearly identical from above. Treat the camshaft or engine assembly as the authority when parts have been mixed. A firing order cast into an intake, copied from a generic decal, or remembered from another V8 is not enough to identify a modified engine.
The application table separates the order, cylinder banks, and ignition-system notes. Read all columns before routing. The first number in 1-8-4-3-6-5-7-2 is cylinder 1, but the physical No. 1 terminal can appear in different clock positions when a distributor has been installed on a different gear tooth.
Bank numbering and verification on the 350 Rocket V8
The traditional Oldsmobile distributor routes counterclockwise. GM divisions produced different 350 engines, so casting identity matters even when combustion order matches.
The traditional Oldsmobile distributor routes counterclockwise. GM divisions produced different 350 engines, so casting identity matters even when combustion order matches.
Oldsmobile 350 Rocket V8 specifications can change by model year, engine, platform, wheel, and installed component. Confirm the VIN or engine identity, part numbers, fastener condition, and the current manufacturer instructions before service.
Procedures used with this specification
These steps are the same for every vehicle in this family, so they are documented once rather than repeated on each page. The values above remain specific to this Oldsmobile 350 Rocket V8.
Oldsmobile 350 Firing Order and Cylinder Diagram FAQs
What is the oldsmobile 350 firing order?+
The 350 Rocket V8 firing order is 1-8-4-3-6-5-7-2. Driver bank is 1-3-5-7 and passenger bank is 2-4-6-8, front to rear.
Technical sources
TorqueSheet favors engine- and component-specific manufacturer instructions over unsourced universal values.
1Vertex electronic-distributor application instructionsApplication chart lists Oldsmobile 307/330/350/400/403/425/455 with 1-8-4-3-6-5-7-2 order and counterclockwise distributor rotation.↗