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 4937308 form, 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

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.

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