Product Description
Interstate-McBee M-3937214 Piston Cooling Nozzle – 94–02 5.9L Cummins (12V/24V)
Restore factory piston oil-jet cooling on your 1994–2002 5.9L Cummins with this OEM-style Interstate-McBee M-3937214 piston cooling nozzle (oil squirter). Designed for direct fit and dependable lubrication under load, it helps control piston temperatures for durability and consistent performance.
- Direct-fit replacement: Drop-in nozzle matches OEM geometry for proper aim and flow.
- OEM-style construction: Precision-machined for reliable sealing and long service life.
- Aftermarket value: Interstate-McBee quality at a fraction of OEM boxed pricing.
- Sold individually: Order per cylinder as needed (typical 6 per 6-cyl engine).
Specifications
| Brand / Part No. | Interstate-McBee M-3937214 |
|---|---|
| OEM Cross-Reference | Cummins 3937214 |
| Additional Cross-Refs | 3930139, 3919002 (common alternates) |
| Engine Family | Cummins B-Series / ISB / QSB |
| Position | Piston cooling nozzle (oil jet / squirter) |
| Quantity | Sold individually |
Vehicle Fitment
Verify by engine serial number (ESN) when possible.
- Dodge Ram 2500/3500 – 5.9L Cummins:
- 1994–1998 12-Valve 5.9L
- 1998.5–2002 24-Valve ISB 5.9L
Install Notes
- Always clean the bore and inspect the jet for debris; verify nozzle aim toward piston underside.
- Use the Cummins service manual procedures and torque specs for your ESN.
- Prime lubrication and verify oil pressure after installation.
What’s Included
- (1) Interstate-McBee piston cooling nozzle (M-3937214); seals as required by service manual (not included unless noted).
Why Buy From CPP Diesel
- Expert B-series fitment support and ESN verification.
- Fast shipping options and easy returns.
- Curated components to complement your rebuild (pistons, pins, rings, bearings, seals).
FAQ
Will this fit both 12-valve and 24-valve 5.9L engines?Yes—this nozzle is listed for 1994–2002 5.9L Cummins applications covering 12V (’94–’98) and early 24V ISB (’98.5–’02). Verify by ESN for edge cases.
Is it sold individually or as a set?
Sold individually. Many customers order six nozzles for a full refresh on a 6-cylinder engine.
What are the OEM and alternate part numbers?
Primary OEM cross is 3937214; common alternates include 3930139 and 3919002.
Which engines use this nozzle outside of pickups?
It’s used primarily on Cummins B-series ISB/QSB platforms in addition to the 5.9L pickup applications (usage depends on ESN).
Product Videos
Custom Field
YEAR 1994-2002
MAKE DODGE
ENGINE 5.9L
