Product Description
CUMMINS 4937308 OEM PISTON COOLING NOZZLE FOR 2003-2018 5.9L AND 6.7L CUMMINS
The genuine Cummins 4937308 piston cooling nozzle is an OEM oil squirter designed for 2003-2018 5.9L and 6.7L Cummins ISB engines.
This nozzle sprays a precise stream of engine oil onto the underside of the piston crown to help control piston temperatures, improve durability, and reduce the risk of piston scuffing or thermal damage during towing, high-load, and performance operation.
Designed to Cummins factory specifications, the 4937308 nozzle restores proper oil flow and spray pattern for dependable piston cooling and long-term engine reliability.
FEATURES
- Genuine OEM Cummins piston cooling nozzle
- Direct-fit replacement oil squirter
- Designed for proper piston cooling and lubrication
- Helps reduce piston crown temperatures
- Supports long-term engine durability
- Ideal for engine rebuilds and performance applications
- Factory-correct spray angle and oil flow
FITMENT
- 2003-2007 Dodge Ram 2500 and 3500 5.9L Cummins ISB Common Rail
- 2007.5-2018 Ram 2500 and 3500 6.7L Cummins ISB
- Select industrial ISB and QSB Cummins applications
Fitment Note: Verify compatibility using engine serial number or CPL before ordering.
WHAT'S INCLUDED
- 1 Cummins 4937308 OEM piston cooling nozzle
IMPORTANT NOTES
- Sold individually
- Six nozzles required per engine
- Banjo bolt 3964817 sold separately
- Recommended during engine rebuilds and overhauls
CROSS-REFERENCE
- Cummins 4890024
- Cummins 3968877
RELATED PARTS
- Cummins main bearing sets
- Cummins rod bearing sets
- Cummins oil pumps
- Cummins piston ring kits
- Cummins lower engine gasket kits
INSTALLATION NOTES
- Confirm proper nozzle orientation during installation
- Clean oil passages thoroughly before assembly
- Torque hardware to Cummins specifications
- Replace all piston cooling nozzles together during rebuilds
- Inspect oil galleries for debris and contamination
SPECIFICATIONS
- Brand: Cummins
- Part Number: 4937308
- Product Type: Piston cooling nozzle
- Function: Piston oil squirter and cooling jet
- Engine Compatibility: 5.9L and 6.7L Cummins ISB
- Fitment Years: 2003-2018
- Quantity Required: 6 per engine
- Associated Hardware: Banjo bolt 3964817 sold separately
- Cross Reference: 4890024 and 3968877
- Approximate Shipping Weight: 0.08 pound each
- Condition: New genuine Cummins OEM part
FAQ
Will this fit my 2003-2018 5.9L or 6.7L Cummins Ram?
Yes. Cummins 4937308 is commonly used on many 2003-2018 5.9L and 6.7L Cummins ISB applications.
How many nozzles do I need?
Six piston cooling nozzles are required per engine. These are sold individually.
Does this include the banjo bolt?
No. Banjo bolt 3964817 is required for installation and is sold separately.
Is this a genuine Cummins OEM part?
Yes. This is a genuine Cummins OEM piston cooling nozzle.
Why are piston cooling nozzles important?
Piston cooling nozzles help reduce piston temperatures and improve engine durability under towing, high-load, and performance conditions.
