Product Description
CUMMINS 3924755 OEM MOLDED COOLANT HOSE – THERMOSTAT HOUSING TO CYLINDER HEAD – 5.9L 12-VALVE (1994–1998)
The genuine CUMMINS 3924755 molded coolant hose connects the thermostat housing to the cylinder head on 1994–1998 Dodge Ram 2500 and 3500 trucks equipped with the 5.9L 12-valve Cummins. This hose is part of the upper cooling system bypass circuit, ensuring proper coolant flow during engine warm-up and maintaining stable operating temperatures. If your factory hose is cracked, swollen, or leaking, this OEM molded replacement restores correct fitment and reliability.
Unlike generic straight-cut hoses, the OEM 3924755 includes the factory-correct molded curvature to prevent kinking, abrasion, and collapse under high heat. Built to Cummins cooling system specifications, it withstands extreme temperature cycling and chemical exposure inherent in diesel applications.
Key Features
- Genuine Cummins OEM molded hose – exact shape and fit as original equipment.
- Prevents kinked coolant flow thanks to factory-engineered curvature.
- Direct-fit for 1994–1998 5.9L 12-valve engines.
- High-temperature and chemical-resistant construction designed for heavy-duty diesel cooling systems.
- Ensures proper coolant bypass routing during engine warm-up and normal operation.
Fitment Details
- Engine: 5.9L Cummins B-Series 12-Valve (1994–1998)
- Applications: Dodge Ram 2500 / 3500 (12-valve)
- Position: Thermostat housing to cylinder head / coolant bypass hose
- Notes: Replace clamps and inspect adjacent hoses during service.
Cross-Reference & Companion Cummins Parts
For a complete cooling system refresh on your 12-valve, pair CUMMINS 3924755 with these genuine Cummins components available on CPP Diesel:
- CUMMINS 3922072 THERMOSTAT HOUSING COVER
- CUMMINS 3917320 OEM ENGINE THERMOSTAT
- CUMMINS 3286397 WATER OUTLET GASKET
- VIEW ALL GENUINE CUMMINS PARTS
Common Cummins cross-reference numbers: 3924755, 3916149 (verify via VIN/ESN).
Installation Notes
- Always install with new clamps to ensure a proper seal.
- Inspect adjoining coolant hoses for age-related wear.
- Check coolant level and bleed the system after installation.
- Never reuse soft, oil-soaked, or swollen hoses.
Specifications for cummins 3924755
| Attribute | Value |
|---|---|
| Brand | Cummins (Genuine OEM) |
| Cummins Part Number | 3924755 |
| Alternate / Superseded Numbers | 3916149 (verify by VIN/ESN) |
| Function | Molded coolant bypass hose (thermostat housing to cylinder head) |
| Engine Compatibility | 5.9L Cummins 12-Valve (1994–1998) |
| Vehicle Fitment | Dodge Ram 2500 / 3500 (12-valve) |
| UPC | 190910284403 |
| GTIN | 190910284403 |
| Shipping Weight | Approx. 0.30 lbs |
| Shipping Method | Standard ground |
| E-Codes / Emissions | Not emissions related |
| Prop 65 Warning | WARNING: This product may expose you to chemicals known to the State of California to cause cancer and reproductive harm. See www.P65Warnings.ca.gov. |
| Country of Origin | As labeled by Cummins (varies by lot) |
Frequently Asked Questions
WILL THIS FIT MY 1994–1998 12-VALVE CUMMINS?
Yes—CUMMINS 3924755 is the correct molded bypass hose for 12-valve 5.9L engines in these years. Always verify via VIN/ESN for absolute accuracy.
WHAT DOES THIS HOSE CONNECT?
This hose connects the thermostat housing to the cylinder head, allowing controlled coolant bypass during engine warm-up.
SHOULD I REPLACE OTHER COOLANT HOSES AT THE SAME TIME?
Yes. Consider replacing the thermostat housing components and thermostat while servicing the cooling system.
IS THIS A GENUINE CUMMINS HOSE?
Yes—CPP Diesel supplies only authentic Cummins OEM components for maximum durability and correct engine fitment.
