Product Description
CUMMINS 3802422 OEM PISTON RING SET (.020 OVER) – 5.9L CUMMINS 12V/24V (1989–2002)
The genuine CUMMINS 3802422 OEM .020” oversize piston ring set restores factory compression, oil control, and sealing performance on rebuilt 1989–2002 5.9L Cummins 12-valve and 24-valve engines. Whether you're doing a complete overhaul or refreshing a worn high-mileage 6BT/ISB platform, these rings are engineered to match OEM material hardness, tension, and top ring face profile for long service life.
These .020” oversize rings are specifically designed for cylinders that have been bored .020” over during machine work. When paired with proper machining and OEM-grade pistons, they deliver tight sealing, reduced blow-by, improved oil control, and restored power on any on-road or off-road B-Series engine.
CPP Diesel carries the full line of genuine Cummins engine components including rings, pistons, bearings, and gaskets. Pair this set with complementary OEM parts such as the CUMMINS 3802006 piston or CUMMINS 3804896 main bearing set for a complete overhaul solution.
Key Features
- Genuine Cummins OEM .020” oversize piston ring set.
- Correct ring tension and metallurgy for factory-level durability.
- Precision fitment for .020" overbore cylinders.
- Restores compression, oil control, and sealing on worn engines.
- Fits both 12-valve (1989–1998) and 24-valve (1998.5–2002) 5.9L Cummins engines.
Fitment Details
- Engine: 5.9L Cummins B-Series (6BT / ISB)
- Valve Configurations: 12V (’89–’98) and 24V (’98.5–’02)
- Years: 1989–2002
- Application: Engines machined for .020” overbore
Always verify oversize requirements with your machine shop before ordering.
Cross-Reference & Companion Cummins Parts
- CUMMINS 3802006 OEM PISTON – STANDARD
- CUMMINS 3802747 OEM PISTON PIN
- CUMMINS 3804896 OEM MAIN BEARING SET
- VIEW ALL GENUINE CUMMINS PARTS
Common Cross-References: 3802422, 3802422RX, 3802422-020 (oversize designation)
Specifications for cummins 3802422
| Attribute | Value |
|---|---|
| Brand | Cummins (Genuine OEM) |
| Cummins Part Number | 3802422 |
| Oversize | .020" (0.50mm) overbore |
| Engine Compatibility | 5.9L Cummins 12V & 24V (1989–2002) |
| UPC | 750335555258 |
| GTIN | 00750335555258 |
| Shipping Weight | Approx. 1.0 lb |
| Shipping Method | Standard ground or expedited options |
| Cross Reference | 3802422RX, 3802422-020 |
| E-Codes | Used on 6BT/ISB emissions families; verify by ESN |
| Prop 65 Warning | WARNING: This product can expose you to chemicals known to cause cancer and reproductive harm. See www.P65Warnings.ca.gov. |
| Country of Origin | Varies by production lot |
Frequently Asked Questions
WILL THESE RINGS FIT BOTH 12-VALVE AND 24-VALVE 5.9L CUMMINS ENGINES?
Yes. The 3802422 ring set fits all 1989–2002 5.9L Cummins engines when bored .020” over.
DO I NEED TO CONFIRM THE .020" OVERSIZE BEFORE ORDERING?
Absolutely. Oversize pistons and rings MUST match your machine shop’s bore size.
ARE THESE GENUINE CUMMINS RINGS?
Yes — CPP Diesel sells this as a 100% genuine Cummins OEM piston ring set.
WHAT PISTONS MATCH THESE RINGS?
Any .020” oversize Cummins piston machined for 5.9L engines, such as OEM pistons listed here (oversize variations required).
IS THIS A COMPLETE SET FOR ONE ENGINE?
Yes — this is a full piston ring set for all six cylinders.
