The Cummins Piston Cooling Nozzle 4937308 is a genuine OEM component engineered to deliver optimal piston cooling and maintain engine longevity in heavy-duty Cummins applications. By directing a fine spray of oil onto the underside of the piston crown, this nozzle dissipates excess heat generated during combustion, preventing piston overheating and reducing the risk of engine knock. Designed as a direct-fit replacement for 2003–2018 Dodge Ram 5.9L/6.7L and EPA13 Automotive ISB/QSB engines, it ensures precise factory tolerances, reliability, and straightforward installation. Incorporating high-quality materials and Cummins’ exacting engineering standards, part number 4937308 offers unparalleled durability and consistent performance under severe operating conditions.
Key Features of Cummins Nozzle 4937308
OEM Direct-Fit Design
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Factory Specifications: Manufactured by Cummins to original equipment standards, guaranteeing a perfect fit without modifications Power Driven Diesel.
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Precision Engineering: Each nozzle is machined to exact tolerances to ensure consistent oil flow and spray pattern.
High-Quality Materials
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Durable Construction: Crafted from corrosion-resistant steel alloys that withstand high-temperature environments and repetitive oil flow cycles.
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Long-Lasting Performance: Resists wear and deformation, providing reliable piston cooling even under heavy load or extended idling conditions.
Thermal Management
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Efficient Heat Dissipation: Directs a precise, uniform oil spray to the piston crown’s underside, reducing peak combustion temperatures and preventing hotspot formation Power Driven Diesel.
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Engine Protection: Minimizes piston ring wear, prevents seizure, and reduces the risk of catastrophic engine failure due to excessive thermal stress.
Applications and Compatibility
Compatible Engines
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Dodge Ram 5.9L 24V Cummins (2003–2007 models) Power Driven Diesel
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Dodge/Ram 6.7L Cummins ISB/QSB (2007.5–2018 models) Power Driven Diesel
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EPA13 Automotive 6.7L ISB/QSB Engines in industrial and marine service
Typical Use Cases
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Engine Rebuilds: Replace old or worn oil squirters during complete overhauls to restore factory cooling efficiency.
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Preventive Maintenance: Upgrade nozzles preemptively on high-mileage engines to avert piston damage.
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Performance Applications: Ideal for towing, off-road, agricultural, or marine engines where sustained heavy loads elevate operating temperatures.
Installation Guide
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Preparation:
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Accessing Nozzles:
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Remove the valve cover and rocker assemblies to expose the top of the cylinder head.
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On some models, it may be necessary to remove the oil rail or banjo bolt assemblies.
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Removing Old Nozzles:
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Installing New Nozzles:
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Clean the nozzle ports thoroughly with solvent and compressed air.
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Insert the Cummins 4937308 nozzles, ensuring they seat fully and align with oil feed passages.
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If applicable, torque the banjo bolts (Cummins part 3964817) to spec (typically 18–22 ft-lb) .
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Reassembly and Test:
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Reinstall rocker assemblies, valve cover, and other components.
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Prime the oil system, start the engine, and check for leaks. Monitor oil pressure and temperature to confirm proper operation.
Target Keywords
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Cummins Piston Cooling Nozzle 4937308
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Cummins 4937308 oil squirter
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Dodge Ram piston cooling nozzle
Meta Description
“Discover the OEM Cummins Piston Cooling Nozzle 4937308: a direct-fit replacement for 2003–2018 Dodge Ram 5.9L/6.7L engines, engineered to optimize piston cooling and engine lifespan.”
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