Product Description
Interstate-McBee M-3029820 Injector Body O-Ring — 98.5–02 5.9L Cummins (24-Valve ISB)
Direct-fit replacement injector body O-ring for the 1998.5–2002 Dodge Ram 2500/3500 with the 5.9L Cummins 24-valve (ISB). Restores proper sealing between the injector body and bore to help prevent fuel and combustion gas leaks. Sold individually.
- OE-style fit: Matches factory dimensions for reliable sealing.
- Service ready: Ideal for injector refreshes or leak repairs.
- Cost-effective: Interstate-McBee quality at an aftermarket price.
Specifications
| Brand | Interstate-McBee |
| Part Number | M-3029820 |
| OEM Reference | Cummins 3029820 |
| Engine | 5.9L Cummins ISB (24-valve) |
| Model Years | 1998.5–2002 |
| Sold As | Each (1 O-ring) |
| Typical Qty/Engine | Usually 6 (one per injector) — verify by ESN/service manual |
| Position | Injector body O-ring (valvetrain/fuel system) |
What’s Included
- (1) Injector body O-ring, P/N M-3029820
Vehicle Fitment
Always confirm by engine serial number (ESN) when possible.
- Dodge Ram 2500/3500 5.9L Cummins (24-valve ISB)
- Model Years: 1998.5–2002
Related/Recommended Parts
- Injector sealing washer (copper)
- Upper/return-side injector O-rings or full injector seal kit
- Injector hold-down hardware as needed
- Fuel line/crossover tube seals
Install Notes
- Clean the injector and bore thoroughly; keep debris out of the cylinder.
- Lightly lubricate new O-ring with clean engine oil or diesel fuel; do not install dry.
- Avoid sharp picks that can nick the seal; do not twist/stretch excessively.
- Seat the injector evenly and torque hold-down hardware to spec per the Cummins manual.
- Prime the fuel system and check for leaks after start-up.
Why Buy From CPP Diesel
- Diesel specialists with ESN-verified fitment support
- Fast shipping and easy returns
- Great pricing on Interstate-McBee and complementary Cummins parts
FAQ
How many do I need?
Typically one per injector (six total). Confirm for your specific injector/ESN.
Does this fit 12-valve (1989–1998) engines?
No. This listing is for 24-valve ISB engines from model year 1998.5–2002.
Is this compatible with stock or reman injectors?
Yes—designed as an OE-style replacement seal for factory-dimension injectors.
