Product Description
The Cummins 3901020 OEM Piston Cooling Nozzle is a critical component engineered to maintain proper piston temperature in your 1989–1993 5.9L 12-valve engine. This genuine Cummins part ensures precise oil delivery to the underside of the piston, dramatically improving lubrication stability, detonation resistance, and long-term engine durability.
Fitment
- 1989–1993 Dodge Ram w/ 5.9L 12-Valve Cummins
- Direct OEM replacement for Cummins part number 3901020
- Supports factory oiling architecture for VE-pump engines
Cross-Reference (Cummins-Only)
Why Choose Genuine Cummins Parts?
Only OEM Cummins components deliver the precision oil flow and metallurgy required for stable long-term cooling and piston integrity. Avoid aftermarket variations that frequently underperform or fail prematurely.
Frequently Asked Questions
Does this fit all 1989–1993 12-valve engines?
Yes — this is the correct nozzle for all VE-pump 5.9L Cummins engines from 1989 through 1993.
Should piston cooling nozzles be replaced during a rebuild?
Absolutely. Nozzles often clog or wear internally. New OEM nozzles ensure consistent oil spray volume and direction.
Can I mix new and old cooling nozzles?
No — Cummins recommends replacing all nozzles as a matched set to maintain balanced cooling across all cylinders.
Is this part better than aftermarket oil squirters?
Yes — OEM Cummins nozzles maintain precision orifice sizing and flow rates that aftermarket versions often fail to match.
Specifications for cummins 3901020
| Specification | Details |
|---|---|
| Brand | Cummins Genuine Parts |
| Part Number | 3901020 |
| GTIN | Not published by Cummins |
| UPC | Not published by Cummins |
| Cross Reference | 3901353, 3934433 |
| E-Codes | N/A – Non-electronic component |
| Shipping Weight | 1 lb (approx.) |
| Shipping Method | Standard ground |
| Prop 65 | This product may contain materials known to the State of California to cause cancer or reproductive harm. Learn More |
