Product Description
Cummins 3910810 — Exhaust Rocker Arm / Rocker Lever (5.9L 12V)
MPN: 3910810 | Also Known As: rocker lever, rocker arm (exhaust) | Counterpart: Intake rocker arm 3910811
Why This Part
- ✓ OE geometry & hardness for proper valve lift and long pad life.
- ✓ Direct-fit for 5.9L 12-valve B-Series (1989–1998).
- ✓ Restores valvetrain stability and lash accuracy.
- ✓ Exhaust position lever—pair with 3910811 for intake side.
Quick Specs
| Type | Rocker Lever / Rocker Arm (Exhaust) |
|---|---|
| OE Part # | 3910810 | Intake mate: 3910811 |
| Qty Required | 6 exhaust rockers per engine (sold individually) |
| Adjuster | Uses factory adjuster screw (commonly 3937438) |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 1989–1998 | 5.9L Cummins 12-Valve (6BT, B-Series) | D/W 250/350 (’89–’93); Ram 2500/3500 (’94–’98) |
Industrial/Off-Highway: Common across B-Series 4B/6B applications; Cummins notes usage on Euro II 5.9L B engines—verify by ESN before ordering.
Often Paired With
- Intake Rocker Arm: Cummins 3910811 (intake position)
- Adjuster Screw: Cummins 3937438
- Complete Rocker Assemblies (98.5+): Cummins 4995602 (assembly upgrade)
What’s In The Box
- (1) Genuine Cummins Exhaust Rocker Arm / Rocker Lever (3910810)
- Adjuster screw/nut sold separately (see “Often Paired With”).
Install Tips
- Inspect rocker shaft and pads for galling; replace worn components in pairs/sets.
- Set valve lash to factory spec; re-check after initial heat cycle.
- Use assembly lube on pad/tip and adjuster during install.
FAQ
WILL THIS FIT MY 1989–1998 5.9L 12-VALVE CUMMINS?Yes—this is the OE exhaust rocker lever for 5.9L 12V B-Series used in 1989–1998 Dodge/Ram 2500/3500 (verify by VIN/ESN).
HOW MANY DO I NEED?There are 6 exhaust rockers and 6 intake rockers per engine. Order 6× 3910810 for the exhaust side (and 6× 3910811 for intake) if replacing all.
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins 3910810 with proper metallurgy and pad finish for durability.
DOES THIS INCLUDE THE ADJUSTER SCREW?No—order the adjuster screw separately (commonly Cummins 3937438).
WHAT ABOUT INDUSTRIAL B-SERIES ENGINES?3910810 is widely used across 4B/6B applications and noted by Cummins for Euro II 5.9L B engines. Always confirm by ESN for industrial/off-highway equipment.
