Product Description
CUMMINS 3802487 OEM ENGINE PISTON KIT – STANDARD BORE (STOCK BOWL) – RAM 5.9L 12-VALVE (1994–1998)
The CUMMINS 3802487 OEM engine piston kit is the factory-standard piston assembly for 1994–1998 5.9L 12-valve engines. This kit features the correct stock-style combustion bowl and standard bore sizing, making it the ideal choice for OE rebuilds, stock restorations, and dependable long-term service. Built to Cummins durability standards, this piston kit delivers proper compression, fuel atomization, and temperature control under heavy load.
Each kit includes a matched OEM piston, wrist pin, retainers, and rings engineered specifically for the 5.9L 12-valve B-series platform. If you're refreshing a high-mileage P-pump engine or repairing scored cylinders, installing a genuine Cummins piston kit ensures the strength, performance, and reliability your engine was designed for.
Key Features
- Genuine Cummins OEM piston – correct factory bowl design.
- Standard bore (STD) sizing for non-machined cylinders.
- Complete kit: piston, wrist pin, retainers, and rings.
- Heat-treated alloy construction for durability under towing and heavy use.
- Direct replacement for 1994–1998 5.9L 12-valve engines.
Fitment Details
- Engine: 5.9L Cummins 12-Valve (P7100 engines)
- Years: 1994–1998
- Applications: Dodge Ram 2500 & 3500
- Bore Size: Standard (STD)
- Piston Bowl: Stock OEM combustion bowl
- Notes: Verify piston size (STD/OS) with VIN/ESN and cylinder measurements.
Cross-Reference & Companion Cummins Parts
CPP Diesel carries all major 12-valve engine components to pair with CUMMINS 3802487:
- CUMMINS 3904166 PISTON RING SET – STANDARD (5.9L 12V)
- CUMMINS 3904374 MAIN BEARING SET – STANDARD
- CUMMINS 3802070 ROD BEARING SET – STANDARD
- VIEW ALL GENUINE CUMMINS OEM PARTS
Common Cummins alternates: 3802487, 3802487NX (reman), verify by VIN/ESN.
Installation Notes
- Always measure cylinder bore before installing standard pistons.
- Professional honing is recommended for proper ring seal.
- Match all pistons by weight when rebuilding multiple cylinders.
- Clean ring grooves thoroughly before ring installation.
- Follow Cummins torque specifications during assembly.
Specifications for cummins 3802487
| Attribute | Value |
|---|---|
| Brand | Cummins (Genuine OEM) |
| Cummins Part Number | 3802487 |
| Alternate Numbers | 3802487NX (reman variant) |
| Function | Standard bore piston kit for 5.9L 12-valve |
| Engine Compatibility | 5.9L Cummins 12-Valve (1994–1998) |
| Kit Contents | Piston, rings, wrist pin, retainers |
| Bore Size | Standard (STD) |
| UPC | 190910285011 |
| GTIN | 190910285011 |
| Shipping Weight | Approx. 3.7 lbs |
| Shipping Method | Standard or expedited ground |
| E-Codes / Emissions | Non-emissions internal engine component |
| Prop 65 Warning | WARNING: May expose you to chemicals known to the State of California to cause cancer and reproductive harm. Visit www.P65Warnings.ca.gov. |
| Country of Origin | As labeled by Cummins (varies by lot) |
Frequently Asked Questions
IS THIS THE CORRECT PISTON FOR MY 1994–1998 12-VALVE?
Yes — CUMMINS 3802487 is correct for most 5.9L 12-valve engines from 1994–1998 using standard-bore pistons. Always confirm with VIN/ESN.
DOES THIS KIT INCLUDE RINGS?
Yes. The kit includes the piston, rings, wrist pin, and retainers.
WHAT IS THE BOWL DESIGN?
This piston features the OEM stock bowl shape used on factory 12-valve engines.
CAN I MIX STANDARD PISTONS WITH OVERSIZE PISTONS?
No. Cylinder bores must be machined consistently; always match piston sizes.
IS THIS A REAL CUMMINS OEM PISTON KIT?
Yes — CPP Diesel supplies genuine Cummins OEM parts only.
