Product Description
The CUMMINS 3901020 OEM PISTON COOLING NOZZLE (OIL SQUIRTER) is designed for 1989–1993 5.9L 12V Cummins diesel engines. This genuine Cummins oil squirter directs pressurized engine oil to the underside of the piston to help control piston temperatures, improve durability, and support long-term engine reliability.
Use this part when rebuilding a 5.9L Cummins engine, repairing lubrication system components, or replacing damaged or clogged piston cooling nozzles. Always verify fitment by engine serial number before ordering.
FEATURES
- Genuine Cummins OEM piston cooling nozzle
- Directs oil to the underside of the piston for cooling
- Designed for 1989–1993 5.9L 12V Cummins engines
- Helps reduce piston crown temperatures
- Supports engine durability and long service life
- Recommended during engine rebuilds and overhauls
FITMENT
- 1989–1993 Dodge Ram D250/D350 5.9L 12V Cummins
- 1989–1993 Dodge Ram W250/W350 5.9L 12V Cummins
- Select 5.9L Cummins industrial and commercial applications
WHAT'S INCLUDED
- 1 Cummins 3901020 OEM Piston Cooling Nozzle (Oil Squirter)
CROSS-REFERENCE AND RELATED PRODUCTS
- Cummins 3901020
- Piston and connecting rod service components
- Engine overhaul and rebuild parts
SPECIFICATIONS
- Manufacturer: Cummins
- Part Number: 3901020
- Part Type: Piston Cooling Nozzle / Oil Squirter
- Engine Compatibility: 5.9L 12V Cummins
- Fitment Years: 1989–1993
- Vehicle Application: Dodge Ram D250, D350, W250, W350
- Condition: New
- Quantity: Sold Individually
FAQ
Will this part fit my truck?
This part fits the applications listed above. Always verify your year, make, model, engine, and engine serial number before ordering.
What does a piston cooling nozzle do?
The piston cooling nozzle sprays engine oil onto the underside of the piston to help control temperatures and improve engine durability.
Is this a direct replacement?
Yes. Cummins 3901020 is a genuine OEM direct-fit replacement piston cooling nozzle for the listed applications.
What is included?
This listing includes one Cummins 3901020 OEM piston cooling nozzle.
Should piston cooling nozzles be replaced during an engine rebuild?
Many engine builders inspect and replace worn, damaged, or restricted nozzles during a rebuild to help ensure proper piston cooling and lubrication.
Do I need any related parts?
Inspect the pistons, connecting rods, bearings, oil passages, and related lubrication system components during installation and replace worn parts as necessary.
