INTERSTATE-MCBEE M-4937308 PISTON COOLING NOZZLE 03–18 5.9L/6.7L CUMMINS (AFTERMARKET REPLACEMENT)

Product Description

Interstate-McBee M-4937308 Piston Cooling Nozzle — 2003–2018 5.9L/6.7L Cummins (Aftermarket Replacement)

OE-style piston cooling nozzle (oil squirter) for 2003–2018 Ram trucks with 5.9L and 6.7L Cummins ISB engines. Direct replacement for the factory jet that sprays oil at the underside of the piston crown to control temperature and reduce wear. Sold individually.

• Direct fit: Replaces the factory nozzle without modification.
• OE-equivalent performance: Maintains piston cooling and lubrication under load.
• Quality materials: Interstate-McBee build for durability in high-temperature, high-pressure service.

Specifications

What’s Included

• (1) Piston cooling nozzle, P/N M-4937308

Vehicle Fitment

Always verify by engine serial number (ESN) when possible.

• Ram 2500/3500/4500/5500 with Cummins ISB:
  • 5.9L (24-valve common-rail): 2003–2007
  • 6.7L: 2007.5–2018
• Other ISB applications calling for Cummins 4937308 (confirm by ESN).

Install Notes

• Clean oil passages thoroughly; keep debris out of the orifice.
• Inspect each nozzle for damage or clogging before installation.
• Use new fasteners/seals if required by the service manual.
• Follow Cummins service procedures and torque specs; verify nozzle orientation toward piston underside.

Why Buy From CPP Diesel

• Diesel-specialist support and ESN-verified fitment
• Fast shipping and competitive pricing
• Inventory of complementary ISB bottom-end and valvetrain parts

FAQ

How many do I need?

Six per engine (one per cylinder). This item is sold individually.

Should I replace all nozzles at once?

Recommended during rebuilds or when one is clogged or damaged, to maintain even cooling across cylinders.

Do these include bolts or seals?

No. Reuse is application-dependent—follow the service manual. Replace any single-use hardware as specified.