Product Description
Interstate-McBee M-3802422 Piston Ring Set – .020" (0.50 mm) Oversize – 89–02 5.9L Cummins
Restore compression and oil control on your 1989–2002 5.9L Cummins with this .020" (0.50 mm) oversize piston ring set from Interstate-McBee. Built to OEM-equivalent specs for reliable sealing and long service life. Sold per cylinder (one piston)—order 6 sets for a complete engine.
- Correct oversize: .020" / 0.50 mm for properly overbored cylinders.
- OEM-style performance: Ring profiles and materials designed for factory-like sealing.
- Direct replacement: Matches Cummins 3802422 reference.
- Aftermarket value: Interstate-McBee quality at a cost-effective price point.
Specifications
| Interstate-McBee P/N | M-3802422 |
|---|---|
| OEM Cross-Reference | Cummins 3802422 |
| Oversize | .020" (0.50 mm) |
| Sold As | Per cylinder (one piston) – order 6 for full engine |
| Engine Family | Cummins B / ISB 5.9L (6BT & ISB 24-valve) |
| Typical Cross-Refs | 3802052, 3802232, M-3802422 |
| Warranty | Manufacturer warranty (commonly up to 2 years) |
Vehicle Fitment
Always verify by engine serial number (ESN), piston & bore size before ordering.
- Dodge Ram 2500/3500 – 5.9L Cummins
- 1989–1998 12-Valve 6BT
- 1998.5–2002 24-Valve ISB
- Notes: Also used across 4B/6B industrial variants where 0.50 mm oversize is required (confirm by ESN/application).
Installation Notes
- Match rings to .020" (0.50 mm) oversize pistons; do not install on standard bore.
- Hone cylinders to spec and measure end gap; set gaps per Cummins service manual.
- Observe ring orientation and stagger gaps during assembly; lubricate per manual.
What's Included
- (1) Complete ring pack for one piston (.020" / 0.50 mm oversize)
Why Buy From CPP Diesel
- ESN-verified fitment help from real diesel techs
- Fast shipping and easy returns
- Curated 5.9L Cummins catalog for rebuilds and upgrades
FAQ
Is this set per piston or for all six?Sold per cylinder (one piston). Order six sets for a full 5.9L engine.
Will these fit both 12-valve and 24-valve 5.9L Cummins?
Yes—applications include 1989–1998 12V 6BT and 1998.5–2002 24V ISB, provided your cylinders are bored to .020" over and you’re using matching oversize pistons. Verify by ESN.
Can I use .020" rings on a standard bore?
No. .020" (0.50 mm) rings are for oversize bores only with matching .020" pistons after machining/honing.
What ring end gap should I use?
Follow the Cummins service manual for end-gap specs based on ring position and application.
What’s the warranty?
Interstate-McBee rings carry manufacturer warranty (commonly up to 2 years for new parts). Contact us for specific terms.
Product Videos
Custom Field
YEAR 1989-2002
MAKE DODGE
ENGINE 5.9L
