Product Description
Interstate-McBee M-4937308 Piston Cooling Nozzle – 03–18 5.9L/6.7L Cummins
OEM-style piston cooling nozzle (oil squirter) engineered by Interstate-McBee for 2003–2007 5.9L ISB and 2007.5–2018 6.7L ISB Cummins applications. Direct-fit replacement restores precise under-piston oil cooling to control temperatures, reduce scuffing, and extend engine life under towing, heavy load, and performance use.
- Direct replacement: Matches OEM Cummins
4937308form, fit, and function. - Consistent cooling: Accurate spray targeting to the piston underside for thermal control.
- Aftermarket value: Interstate-McBee quality at a lower cost than OEM packaging.
- Stock-location install: Designed to seat and seal like the factory nozzle.
Specifications
| Interstate-McBee Part | M-4937308 |
|---|---|
| OEM Cross-Reference | Cummins 4937308 |
| Additional Cross-Refs | 3968877, 4890024, 4892226, FP-4937308 |
| Position | Piston cooling nozzle (oil squirter) |
| Quantity Required | Typically 6 per engine (one per cylinder) |
| Included | (1) Piston cooling nozzle |
Vehicle Fitment
Always verify by Engine Serial Number (ESN) for exact applications.
- Dodge Ram 2500/3500 5.9L Cummins ISB (Common Rail)
- Model Years: 2003–2007
- Dodge Ram 2500/3500 6.7L Cummins ISB
- Model Years: 2007.5–2018
- Industrial/Other ISB/QSB usage may apply where OEM 4937308 is specified (confirm by ESN/CPL).
Installation Notes
- Inspect and clean oil passages; replace any damaged fasteners or sealing washers as required.
- Follow Cummins service manual procedures for removal/installation and torque values.
- Best practice during overhauls: replace all nozzles as a set to maintain even cooling.
Why Buy From CPP Diesel
- Expert Cummins fitment support (ESN/CPL verification available).
- Fast shipping, easy returns, and real diesel techs on the phones.
- Curated inventory for B-Series/ISB/6.7L platforms.
FAQ
Will M-4937308 fit both 5.9L and 6.7L Cummins?Yes. It is the Interstate-McBee replacement for OEM 4937308 used on 2003–2007 5.9L ISB and 2007.5–2018 6.7L ISB engines. Verify by ESN for edge cases.
How many nozzles do I need?
Most ISB 5.9/6.7 applications use one nozzle per cylinder—six total on inline-6 engines.
Should I replace the bolts/washers?
Inspect hardware and replace if damaged. Some applications pair the nozzle with a dedicated fastener (e.g., OEM service bolt). Follow the Cummins manual and use new washers where specified.
What are the signs of a failing nozzle?
Elevated piston temps, scuffing, oil coking on piston undersides, and uneven cylinder wear. Replacing nozzles restores proper cooling.
Product Videos
Custom Field
YEAR 2003-2018
MAKE DODGE
ENGINE 5.9L,6.7L
Product Reviews
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Perfect great quality!!
Great quality perfect description already installed!
