Product Description
Cummins 3802565 OEM Engine Piston Kit (.040) – Ram 5.9L 12-Valve (1994-1998)
The Cummins 3802565 OEM Engine Piston Kit (.040 Oversize) is a genuine Cummins replacement piston designed for rebuilding 1994-1998 Dodge Ram 5.9L 12-valve diesel engines. Manufactured to meet original Cummins specifications, this piston kit provides the durability, reliability, and precise fit required for professional engine rebuilds, overhauls, and restoration projects.
Whether you're rebuilding a high-mileage 12-valve Cummins or restoring engine performance after cylinder machining, the Cummins 3802565 piston kit delivers OEM-quality construction and dependable long-term operation. This .040-inch oversize piston is intended for engines that have been properly bored and machined to accept oversize pistons during the rebuilding process.
Features
- Genuine Cummins OEM piston kit
- .040-inch oversize piston design
- Engineered specifically for 5.9L 12-valve Cummins engines
- Manufactured to original Cummins specifications
- Designed for professional engine rebuilds and overhauls
- OEM-quality durability and reliability
- Maintains proper compression and combustion characteristics
- Precision-machined for accurate fitment
- Ideal for cylinder bore restoration applications
- Built to withstand demanding diesel operating conditions
Fitment
- 1994 Dodge Ram 2500 5.9L Cummins 12-Valve Diesel
- 1995 Dodge Ram 2500 5.9L Cummins 12-Valve Diesel
- 1996 Dodge Ram 2500 5.9L Cummins 12-Valve Diesel
- 1997 Dodge Ram 2500 5.9L Cummins 12-Valve Diesel
- 1998 Dodge Ram 2500 5.9L Cummins 12-Valve Diesel
- 1994 Dodge Ram 3500 5.9L Cummins 12-Valve Diesel
- 1995 Dodge Ram 3500 5.9L Cummins 12-Valve Diesel
- 1996 Dodge Ram 3500 5.9L Cummins 12-Valve Diesel
- 1997 Dodge Ram 3500 5.9L Cummins 12-Valve Diesel
- 1998 Dodge Ram 3500 5.9L Cummins 12-Valve Diesel
Note: This is a .040-inch oversize piston kit intended for engines that have been bored and machined accordingly. Verify bore size and engine specifications before ordering.
What's Included
- Cummins 3802565 OEM Piston
- Piston Rings
- Piston Pin
- Pin Retainers
- Factory-Included Hardware and Components as Supplied by Cummins
Specifications
- Manufacturer: Cummins
- Part Number: 3802565
- Product Type: OEM Engine Piston Kit
- Oversize: .040 Inch
- Engine Platform: Cummins 5.9L 12-Valve Diesel
- Engine Code: 6BT 5.9L
- Fuel Type: Diesel
- Construction: OEM Cummins Cast Aluminum Piston
- Application: Engine Rebuild and Overhaul
- Fitment Years: 1994-1998 Dodge Ram Cummins
- Cylinder Configuration: Inline 6 Cylinder
- Installation Requirement: Requires Properly Machined .040 Over Bore Cylinder
Cross Reference Numbers
3802565, Cummins 3802565, 6BT Piston Kit, 5.9L Cummins Piston Kit, .040 Over Piston, Dodge Ram 12-Valve Piston Kit
FAQ
What does .040 oversize mean?
A .040 oversize piston is designed for an engine block that has been machined .040 inch larger than the factory bore size during a rebuild. Cylinder measurements should always be verified before ordering.
Will this fit a stock, unmachined engine block?
No. This piston is specifically designed for engines that have been bored .040 inch over standard size. Standard bore engines require the correct standard-size piston.
Is this a genuine Cummins piston?
Yes. The 3802565 is a genuine Cummins OEM replacement piston designed to meet original equipment specifications.
What engines use this piston kit?
This piston kit is designed for 1994-1998 Dodge Ram trucks equipped with the 5.9L 12-valve Cummins diesel engine.
Is this intended for performance builds?
This is an OEM replacement piston intended primarily for stock rebuilds, restoration projects, and reliable engine overhauls. Performance applications may require specialized piston designs depending on horsepower goals.
Should piston-to-wall clearance be checked during installation?
Yes. As with any engine rebuild, piston-to-wall clearance, ring end gap, cylinder finish, and overall engine specifications should be verified according to Cummins service procedures.
