Dodge 360 Timing Marks: LA and 5.9 Magnum Chain Alignment
Dodge 360 timing-mark guide showing crank/cam sprocket alignment, LA versus 5.9 Magnum checks, external-balance cautions, distributor indexing and verification.
On a conventional Dodge/Chrysler 360 timing set, align the crankshaft-sprocket mark at 12 o'clock and the camshaft-sprocket mark at 6 o'clock so both lie on the exact centerline through the two shaft bores. Assemble the chain around both sprockets on the bench, spread the sprockets apart, verify the marks with a straightedge, and slide both sprockets evenly onto the crank and cam together. This is mechanical cam timing, not the vehicle's ignition-timing value.
The 360 uses the same clear factory alignment principle as the 318: the two sprocket index marks must fall on a straight line through the shaft centers. That statement is more reliable than judging clock positions from a tilted photograph, especially when an aftermarket set has several crank keyways or extra advance/retard symbols.
The 360 needs its own page because its balance hardware is a major trap. Production LA 360 and 5.9 Magnum combinations are generally externally balanced, but the amount and location of imbalance differ among applications. A neutral 318 damper or wrong flexplate can create severe vibration even when valve timing is perfect.
Ignition timing is also year-specific. Carbureted LA engines, lean-burn/electronic-era engines and Magnum PCM-controlled applications cannot share one distributor-adjustment chart. This broad guide remains indexable but visibly limited until separate year/vehicle service illustrations are attached.
Interactive Dodge 360 timing-reference map
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Functional front view showing the sprocket-centerline method and separate balancer/distributor references. Confirm LA or Magnum before choosing parts.
Dodge 360 Timing Mark Alignment Diagram
| APPLICATION / ITEM | SPECIFICATION | NOTES |
|---|---|---|
| Crank mark | 12 o'clock | On exact crank/cam centerline |
| Cam mark | 6 o'clock | Adjacent to crank mark |
| Installation | Both sprockets and chain together | Straightedge-verify before and after seating |
| Dot-to-dot position | Cylinder 6 firing | One crank turn to cylinder 1 compression |
| Balance | Application-specific external balance | Do not interchange 318 damper/flywheel hardware |
A 360 can be an LA carbureted engine or a 5.9L Magnum EFI engine, and most production 360 combinations are externally balanced. The offset weight in the damper or converter/flywheel is not a timing mark and must not be substituted or mixed with 318 neutral-balance hardware. Dot-to-dot places cylinder 6 in its firing position; rotate the crank one full revolution before setting the distributor for cylinder 1 compression.
How to use this specification correctly
- 01
Identify LA 360 or 5.9L Magnum by VIN, year and engine hardware; record cam, timing-set and damper/flywheel part numbers.
- 02
Set a known reference and record distributor position before disassembly. Diagnose chain wear and true TDC before assuming the timing set is the only fault.
- 03
Remove balancer and cover with proper tools, protect the oil-pan seal, and note LA fuel-pump eccentric/washer orientation where fitted.
- 04
Remove the distributor/oil-pump drive and use the specified cam-support tool so the cam cannot be pushed into the rear block plug during sprocket installation.
- 05
Place both sprockets on the bench with the crank mark at 12 and cam mark at 6; install the chain and spread the sprockets apart.
- 06
Use a straightedge through both bore centers to prove the marks lie on the same exact line. Identify the zero keyway on multi-keyway sets from the manufacturer instructions.
- 07
Align crank keyway and cam locating feature, then slide both sprockets and chain onto their shafts evenly as one assembly.
- 08
Recheck mark alignment, thrust plate/endplay, eccentric stack and cam fastener procedure. Never use unknown torque values across LA and Magnum variants.
- 09
Rotate the crank clockwise two full turns by hand and verify smooth movement and mechanical timing.
- 10
Move one full crank revolution from dot-to-dot for cylinder-1 compression, install the distributor/oil-pump drive by the exact year procedure, and set ignition timing only where the system permits adjustment.
Sprocket marks and multi-keyway sets
A stock-style crank sprocket normally has one keyway and one timing dot. Performance sets may provide multiple keyways to install the cam advanced, straight up or retarded. The symbol beside the chosen keyway must be paired with the matching tooth mark specified by that manufacturer.
Do not automatically align the most obvious two dots on a multi-keyway set. Confirm the requested cam intake centerline with a degree wheel when the build calls for more than stock replacement.
LA 360 versus 5.9 Magnum
The LA version may carry a mechanical fuel-pump eccentric and uses earlier front-cover/accessory arrangements. The Magnum 5.9 uses EFI, a roller cam in production applications and PCM-managed ignition strategy. Chain alignment is similar, but the surrounding hardware and diagnostic procedure differ.
Keep cam thrust components, oiling provisions and distributor/oil-pump drive matched to the engine family. An aftermarket retrofit can combine features, so physical part numbers overrule assumptions based only on the intake manifold.
External balance is not valve timing
External balance weights correct rotating-assembly imbalance. They do not determine cam phase or ignition advance. A 360 damper may have an offset mass while also carrying a narrow timing notch; those features serve different purposes.
Verify the damper, converter/flexplate or flywheel belongs to the exact LA or Magnum rotating assembly. If the timing mark appears wrong, prove true TDC rather than moving the chain to compensate for a slipped ring or mismatched pointer.
Distributor and ignition setup
At dot-to-dot, cylinder 6 is ready to fire. Rotate the crank one turn for cylinder 1 compression and confirm both #1 valves are closed before positioning the distributor drive and rotor.
On PCM-controlled Magnum applications, base timing is not adjusted by turning the distributor in the traditional way; distributor indexing/synchronization affects injector and cam-signal relationship. Use the scan-tool/service procedure for the exact year.
Verification checklist
- LA or Magnum family confirmed
- Correct externally balanced damper/flywheel parts confirmed
- Zero or selected timing-set keyway identified
- Marks adjacent on exact sprocket-center line
- Both sprockets installed together
- Cam rearward movement controlled
- Thrust/endplay and eccentric hardware verified
- Engine rotates smoothly by hand
- True TDC and pointer accuracy checked
- Distributor setup matched to carbureted/electronic/PCM system
Dodge 360 LA / 5.9L Magnum 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.
Dodge 360 Timing Marks: LA and 5.9 Magnum Chain Alignment FAQs
Where should Dodge 360 timing-chain dots face?+
The crank dot faces up and the cam dot down so they are next to each other on the exact centerline through both shafts.
Is a Dodge 360 internally or externally balanced?+
Production 360/5.9 combinations are generally externally balanced, but hardware differs by engine family and application. Verify every damper and flywheel/flexplate part number.
Can a 318 harmonic balancer be used on a 360?+
Not as a general substitution. A neutral-balance 318 damper does not provide the required 360 external balance and can cause damaging vibration.
Is dot-to-dot cylinder 1 compression?+
No. It is cylinder 6 firing. Rotate the crank one complete revolution for cylinder 1 compression.
Can I adjust timing by rotating a 5.9 Magnum distributor?+
Not like a carbureted LA engine. The PCM controls spark timing; distributor indexing/sync must follow the exact scan-tool procedure.
What do multiple keyways on a timing set mean?+
They permit advanced, straight-up or retarded cam installation. Pair each keyway with its matching tooth mark exactly as the timing-set instructions state.
Technical sources
TorqueSheet favors engine- and component-specific manufacturer instructions over unsourced universal values.
1Mopar Performance Parts catalogMopar catalogs LA small-block timing chains and sprockets separately from later engine families, supporting exact application and part identification.↗