Product Description
Interstate-McBee M-3802423 Piston Ring Set (.040 Over) – 89–02 5.9L Cummins
OE-style .040" (1.00 mm) oversize piston ring set for Cummins B/ISB 5.9L engines. Ideal for overbore rebuilds on 1989–2002 Dodge Ram 2500/3500 5.9L Cummins. Sold per cylinder (order 6 sets for a complete engine). Always verify with your engine serial number (ESN) and piston spec.
- Aftermarket replacement: Interstate-McBee quality engineered to OEM form, fit, and function.
- .040" overbore: Sized for cylinders machined +1.00 mm; not for standard bores.
- Per-piston kit: One ring pack per cylinder to simplify service and inventory.
- Built for sealing & longevity: Correct materials and profiles to control blow-by and oil consumption.
Specifications
| Brand / Part No. | Interstate-McBee M-3802423 |
|---|---|
| OEM Reference | Cummins 3802423 (ring set); related refs 3802054, 3802234 |
| Size | .040" over (1.00 mm) |
| Composition | Top ring (keystone) PN 3919051; 2nd ring PN 3904348; oil ring PN 3923891 |
| Quantity | One cylinder set (order 6 for full engine) |
| Engine Families | Cummins B / ISB (4B/6B/5.9L) |
| Warranty | Interstate-McBee new engine parts typically 24 months from installation |
Vehicle Fitment
Fitment varies by piston design and ESN; confirm before ordering.
- Dodge Ram 2500/3500 5.9L Cummins
- 1989–1998 12-Valve 6BT
- 1998.5–2002 24-Valve ISB (early)
- Industrial/Commercial: 4B/6B applications where .040" overbore is specified (verify by ESN).
What’s Included
- (1) Complete piston ring pack for a single 5.9L cylinder (.040"/1.00 mm over)
Installation Notes
- These rings require a .040" (1.00 mm) overbore cylinder and matching .040" pistons.
- Measure end-gaps in the cylinder and file-fit to Cummins service manual specifications.
- Observe ring orientation; keystone top ring installs with the marked side up.
- Use proper hone finish for ring material; clean bores thoroughly before assembly.
Why Buy From CPP Diesel
- ESN-verified fitment help from real diesel techs
- Fast shipping and easy returns
- Deep catalog of B-series rebuild parts to finish the job
FAQ
Is this sold per cylinder or as a full engine set?Sold per cylinder. You’ll need six sets for a complete 5.9L (6-cyl) engine.
Will it fit both 12-valve and 24-valve 5.9L engines?
Commonly used across 1989–2002 B-series applications (12V & early 24V). Verify by ESN and piston/ring spec for your build.
What does “.040 over” mean?
It indicates cylinders bored 0.040" (1.00 mm) larger than stock. Use with matching .040" pistons only.
Do I need special honing or file-fitting?
Yes. Follow the Cummins service manual for surface finish and ring end-gap. File-fit as required to spec.
What’s the warranty?
Interstate-McBee new engine parts typically carry a 24-month warranty from date of installation (usage limits and exclusions may apply).
Product Videos
Custom Field
YEAR 1989-2002
MAKE DODGE
ENGINE 5.9L
