Product Description
Genuine Cummins
Cummins 3922488 — Rocker Lever Shaft
MPN: 3922488 | Also Known As: rocker arm shaft, rocker lever support | Platform: Cummins B-Series (incl. 5.9L 12V; industrial B variants)
Why This Part
- ✓ OE rocker shaft that supports the valve train for accurate lift and timing.
- ✓ Direct-fit for 1989–1998 5.9L 12-valve Dodge Ram applications (verify by VIN/ESN).
- ✓ Hardened OE construction for long service life under high valvetrain loads.
- ✓ Helps restore smooth rocker motion after wear or contamination.
OE Fit Valve Train Sold Individually
Quick Specs
| Type | Rocker Lever Shaft (valvetrain support) |
|---|---|
| OE Part # | 3922488 |
| Common Cross-Refs | 3902583, 3907048, 3910814, 3922486, 3922487 |
| Qty Required | Sold individually; many engines use one per rocker bank (intake/exhaust). Verify by ESN. |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 1989–1998 | Cummins 5.9L 12-Valve (6BT) | Dodge/Ram 2500 & 3500 |
Industrial/Off-Highway: Also used on B-Series industrial variants (4B/6B, ISB). Confirm by ESN.
Often Paired With
- Rocker Lever Shaft Retainer: Cummins 3901764 (retains shaft in housing)
- Rocker Lever Clamp/Cap: Cummins 3901693
- Rocker Arms: Intake/Exhaust rockers (replace if galled or seized)
- Fresh engine oil & valve lash adjustment per service manual after install
What’s In The Box
- (1) Genuine Cummins Rocker Lever Shaft (3922488)
- Retainers/clamps sold separately (see “Often Paired With”).
Install Tips
- Clean, inspect, and oil all rocker bores; use assembly lube on the shaft.
- Install with correct orientation; torque fasteners to factory spec.
- Set valve lash to spec and recheck after initial heat cycle.
FAQ
WILL THIS FIT MY 1989–1998 5.9L 12-VALVE?Yes—3922488 is listed for 1989–1998 5.9L 12V Dodge/Ram applications (verify by VIN/ESN).
IS THIS THE INTAKE OR EXHAUST SIDE?This is a rocker lever shaft; applications may use one per rocker bank (intake/exhaust). Check your ESN and service manual.
WHAT RELATED HARDWARE DO I NEED?Commonly replaced items include the shaft retainer (3901764), clamp/cap (3901693), and any worn rocker arms.
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins 3922488 built to factory material and dimensional specs.
WILL THIS FIT 24-VALVE (1998.5+)?No—24V engines use different rocker assemblies/shafts. This listing targets 12-valve applications.
