Product Description
Cummins 3802487 — Engine Piston Kit (Standard Bore, Stock Bowl) for 5.9L B-Series
MPN: 3802487 | Also Known As: piston kit, STD bore piston | Includes: piston, rings, wrist pin & clips
Why This Part
- ✓ OE piston kit designed for the 5.9L B-Series—reliable daily-driver durability.
- ✓ Standard bore (STD) stock-bowl piston for factory combustion characteristics.
- ✓ Complete kit with rings, wrist pin, and retainers for each cylinder.
- ✓ Built to Cummins specs for fit, balance, and longevity.
Quick Specs
| Type | Engine piston kit (STD bore, stock bowl) |
|---|---|
| OE Part # | 3802487 |
| Components | Piston, rings, wrist pin & clips (per cylinder) |
| Qty Required | 6 kits for a full engine set (sold individually per cylinder) |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 1994–1998 | 5.9L Cummins 12-Valve (6BT) | Ram 2500/3500 |
Notes: Cummins lists 3802487 for non-certified 5.9L B-Series applications; for 1989–1993 12-valve builds or industrial 4BT/6BT, verify by ESN and bowl/CR requirements before ordering.
Often Paired With
- Head gasket & top-end set for 12-valve refresh
- Main & rod bearings during in-frame rebuild
- Honing & measurement tools to confirm STD bore & ring gaps
- Alt. piston kits (reference): 3802160 (STD, marine bowl) · 3802132 (.020, marine) · 3802134 (.040, marine)
What’s In The Box
- (1) Genuine Cummins Piston Kit 3802487 — piston, rings, wrist pin & clips
- Order 6 kits for a complete set
Install Tips
- Measure cylinder bores; standard bore only. Hone as needed; set ring gaps to spec.
- Orient piston/bowl and rings per Cummins procedure; lubricate pin & skirts on install.
- Torque fasteners to spec; verify piston protrusion and head gasket thickness as required.
FAQ
WILL THIS FIT MY 1994–1998 5.9L 12-VALVE RAM?Yes—this STD-bore, stock-bowl piston kit is commonly used on 1994–1998 5.9L 12-valve (6BT) Ram applications. Always verify by ESN if your engine has been rebuilt or modified.
WHAT COMES IN EACH KIT?Each 3802487 kit includes a piston, ring set, wrist pin, and pin retainers for one cylinder.
HOW MANY DO I NEED FOR A FULL REBUILD?Six kits are required for a full set on the inline-six 5.9L Cummins.
IS THIS STANDARD BORE? DO YOU OFFER OVERSIZE?3802487 is standard bore (STD). Oversize and alternate bowl options exist (e.g., 3802132/.020, 3802134/.040, 3802160/STD marine bowl).
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins piston kit built to factory specifications.
