Dodge/Ram 6.7 Cummins Firing Order Diagram
6.7L Cummins Inline-Six firing order 1-5-3-6-2-4, cylinder numbering, interactive diagram, connector-routing notes, troubleshooting, FAQs.
The 6.7L Cummins Inline-Six firing order is 1-5-3-6-2-4. Cylinders are numbered 1-2-3-4-5-6 from the front gear-housing/radiator end toward the flywheel and transmission.
The 6.7L Cummins Inline-Six firing order is 1-5-3-6-2-4. Cylinders are numbered 1-2-3-4-5-6 from the front gear-housing/radiator end toward the flywheel and transmission. The order is simple to print; the difficult part is applying it to the correct physical cylinders. Cummins' manufacturer-hosted adjustment literature uses the 1-5-3-6-2-4 inline-six sequence, while Cummins identifies the QSB6.7 architecture as an inline six. The truck engine has one cylinder row, not two banks.
A firing-order diagram should answer three separate questions: which cylinder is which, what sequence the crankshaft uses, and how the ignition system reaches each cylinder. Older searches often say 'Dodge 6.7,' but later trucks carry Ram branding. Naming does not change the order; it does matter when retrieving the correct model-year wiring, injector coding and aftertreatment procedure. The interactive drawing below keeps the order visible while the table preserves the numbering notes in crawlable text.
Before disconnecting anything, photograph the harness or leads, label both ends, and identify the engine from a durable source. That five-minute audit is faster than diagnosing a crossed pair after the engine has been reassembled.
Interactive Ram 6.7L Cummins Inline-Six firing-order diagram
Branded downloads includedPNG and PDF exports carry the TorqueSheet logo, torquesheet.com, source-page URL, and republishing attribution request. The PDF source link is clickable.
Select each cylinder to walk through the firing order. Cylinder-bank numbering and distributor direction must match the identified engine family.
Dodge 6.7 Cummins Firing Order Diagram
| APPLICATION / ITEM | SPECIFICATION | NOTES |
|---|---|---|
| Firing order | 1-5-3-6-2-4 | One complete four-stroke combustion sequence |
| Cylinder numbering | Cylinders are numbered 1-2-3-4-5-6 from the front gear-housing/radiator end toward the flywheel and transmission. | Confirm orientation before moving wires or coils |
| Diagnostic rule | Identify before swapping | Coil connector number and cylinder number are not interchangeable |
Cummins' manufacturer-hosted adjustment literature uses the 1-5-3-6-2-4 inline-six sequence, while Cummins identifies the QSB6.7 architecture as an inline six. The truck engine has one cylinder row, not two banks.
Reading the 6.7L Cummins Inline-Six diagram correctly
Cylinders are numbered 1-2-3-4-5-6 from the front gear-housing/radiator end toward the flywheel and transmission. Read the vehicle as installed and use the manufacturer's left/right convention, not the side from which you happen to be standing. The first cylinder listed in 1-5-3-6-2-4 begins the sequence but does not define a universal connector position.
Cummins' manufacturer-hosted adjustment literature uses the 1-5-3-6-2-4 inline-six sequence, while Cummins identifies the QSB6.7 architecture as an inline six. The truck engine has one cylinder row, not two banks. Older searches often say 'Dodge 6.7,' but later trucks carry Ram branding. Naming does not change the order; it does matter when retrieving the correct model-year wiring, injector coding and aftertreatment procedure. On coil-on-plug engines, use the diagram for cylinder identity and diagnosis; the PCM, not a physical distributor cap, schedules spark.
Which 6.7L Cummins Inline-Six firing order applies?
Cummins' manufacturer-hosted adjustment literature uses the 1-5-3-6-2-4 inline-six sequence, while Cummins identifies the QSB6.7 architecture as an inline six. The truck engine has one cylinder row, not two banks. 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 1-5-3-6-2-4 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 6.7L Cummins Inline-Six
Older searches often say 'Dodge 6.7,' but later trucks carry Ram branding. Naming does not change the order; it does matter when retrieving the correct model-year wiring, injector coding and aftertreatment procedure.
Cummins' manufacturer-hosted adjustment literature uses the 1-5-3-6-2-4 inline-six sequence, while Cummins identifies the QSB6.7 architecture as an inline six. The truck engine has one cylinder row, not two banks.
Ram 6.7L Cummins Inline-Six 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 Ram 6.7L Cummins Inline-Six.
Dodge/Ram 6.7 Cummins Firing Order Diagram FAQs
What is the dodge 6.7 cummins firing order diagram?+
The 6.7L Cummins Inline-Six firing order is 1-5-3-6-2-4. Cylinders are numbered 1-2-3-4-5-6 from the front gear-housing/radiator end toward the flywheel and transmission.
Technical sources
TorqueSheet favors engine- and component-specific manufacturer instructions over unsourced universal values.
1Cummins/Jacobs inline-six adjustment sequenceCummins-hosted service instructions explicitly use firing order 1-5-3-6-2-4; exact Ram 6.7L procedures remain engine-serial-number and model-year specific in QuickServe.↗