Diesel fuel shut off solenoids are essential replacements for maintaining proper engine idle and fuel control. This guide highlights five solid choices ideal for Dodge Cummins, 6BT/4BT Cummins engines, and similar diesel systems. The selections emphasize reliability, compatibility, and clear value. Buyers who work on older Dodge pickups, heavy equipment, or mid-range diesel applications will benefit from these solenoids. The table below compares the top options to help you pick quickly based on compatibility, installation scope, and best-use scenarios.
| Product | Brand | Best For | Notes |
|---|---|---|---|
| JDMSPEED 3931570 Replacement Solenoid | JDMSPEED | Dodge Cummins 5.9L 1994-1998 | Direct replacement for Woodward SA-4981-12 compatible with Cummins 3931570 |
| JDMSPEED New Solenoid With Bracket | JDMSPEED | Dodge Cummins 5.9L 1994-1998 | Includes bracket; replacement for 3931570 applications |
| Earlyred 3932529 Solenoid | Earlyred | Cummins 6BT/4BT 5.9L 12V installations | 12V; compatible with multiple part numbers |
| GLOCRORET 3935649 Solenoid | GLOCRORET | Cummins 5.9L & 8.3L engines | Replace SA-4764-12; 12V; broad compatibility |
| U.S. Solid 3/8″ Solenoid Valve | U.S. Solid | General 12V diesel, gas, and fuel projects | Brass body; VITON gasket; low-power coil design |
JDMSPEED New Fuel Shut Off Solenoid 3931570
Best for Dodge Cummins 5.9L diesel engines from 1994-1998. This solenoid is listed as a replacement for Cummins part #3931570 and Woodward SA-4981-12. It is described as premium material suitable for direct replacement in the specified engine family. Best for DIY repairs or shop use where exact Cummins compatibility is needed. A potential limitation is that it targets a specific engine family, so cross-application with other engines may require verification.
JDMSPEED New Solenoid With Bracket Kits 3931570
Better for installations requiring a bracket and mounting flexibility. This solenoid is described as a premium material replacement for Dodge Cummins 5.9L diesel engines (1994-1998) and marketed as a solenoid for a Dodge RAM pickup truck. Choose this if you need a ready-to-molt bracket setup. A limitation is that bracket compatibility should be confirmed with your mounting points before purchase.
Earlyred 3932529 Solenoid For Cummins 6BT/4BT
Best for Cummins 6BT, 4BT, and 5.9L engines with 12V systems. The listing covers multiple related part numbers and emphasizes compatibility with a wide range of 12V injectors and solenoids, making it versatile for varied Cummins-powered equipment. Choose this if you operate a mixed fleet of older diesel engines. A potential limitation is that the part numbers span several models, so confirm exact fit before ordering.
GLOCRORET 3935649 Solenoid For Cummins
Best for Cummins 5.9L and 8.3L engines, including 4B/6B/6C families. This solenoid is listed with multiple cross-refs including Woodward SA-4765-12 and other part numbers, indicating a broad compatibility footprint. Opt for this if you operate in a setting with mixed engine models. A caveat is to double-check the exact mounting and connector configuration to ensure a clean fit.
U.S. Solid 3/8″ Brass Solenoid Valve
Best for general diesel, gas, and fuel projects with a 12V DC supply. The brass body and Viton gasket offer durability and chemical resistance for high-temperature or varied fuel environments. It is notable for low heat generation due to a redesigned coil, starting around 19W and dropping to 10-13W as it warms. Use this when a versatile, low-heat option is preferred, but avoid using with drinking water or pure water systems due to brass composition.
MaySpare 3931570 5016244AA Replacement
Best as a direct replacement for Dodge RAM 2500/3500 with 5.9L Cummins engines (1994-1998). Markets the 12V direct replacement for Cummins B-series diesel engines. It is listed as a quality replacement part with straightforward installation. A limitation is that this listing targets a specific Dodge RAM engine configuration; verify your exact model year and engine code before purchasing.
Buying Guide: Key Considerations When Choosing a Diesel Shut Off Solenoid
- Engine compatibility: Confirm the solenoid’s part numbers map to your engine family (Cummins 5.9L, 6BT, 4BT, etc.).
- Voltage requirements: Most listed options are 12V; ensure your system voltage matches to avoid performance issues.
- Mounting and connectors: Check bracket needs, mounting holes, and electrical plug configurations to fit your setup.
- Material and seals: Brass bodies with Viton gaskets handle high temperatures and diesel fuels well; consider corrosion resistance and chemical compatibility with your fuel type.
- Cross-reference support: Some products list multiple compatible part numbers; verify the exact fit for your machine or vehicle.
- Installation scope: Some solenoids include brackets or harnesses; factor in additional parts or labor if not included.
FAQ
- What is a diesel fuel shut off solenoid? Answer: It is an electrically controlled valve that stops or allows fuel flow to the engine, aiding idle control and fuel shutoff operations.
- Which solenoid is best for a Dodge Ram 5.9L Cummins? Answer: JDMSPEED 3931570 or the bracketed version are specifically listed as replacements for the 1994-1998 5.9L Cummins engines.
- Are these solenoids compatible with other brands? Answer: Some options list compatibility across Cummins 4BT/6BT and Woodward numbers, but cross-compatibility should be verified for each engine.
- What maintenance concerns exist for solenoids? Answer: Electrical connections should be clean and secure; replace if you notice corrosion or intermittent operation.
- Do all solenoids require brackets for installation? Answer: Not always; some include brackets while others do not. Check product details and mounting requirements.
- Can I use a solenoid for petrol engines? Answer: Some solenoids are designed for multiple fuels, but verify compatibility with diesel specifically before use.