Dorman 904-231 Diesel Fuel Injector Rail Plug

Dorman 904-231 Diesel Fuel Injector Rail Plug

Dorman 904-231 is a diesel fuel injector rail plug built to replace the original rail plug on select Ford Super Duty and Excursion applications. It is made from metal with a manganese phosphate finish to help maintain durability in demanding diesel fuel system service.

Key Features

• Direct replacement diesel fuel injector rail plug for OE-style service
• Metal construction for strength and long-term use
• Manganese phosphate housing finish
• Male AN-style fittings
• Outer diameter: 0.52 in; inside diameter: 0.32 in; tube length: 3.1 in
• Package contents: rail plug

Detailed Description

This Dorman rail plug is used in diesel fuel delivery systems where maintaining pressure in the oil rails is necessary for injector operation. It is engineered to replace the original part on 2003-2005 Ford Excursion, 2004-2007 Ford F-250 Super Duty, 2004-2007 Ford F-350 Super Duty, 2004-2005 Ford E-350 Club Wagon, and 2004-2010 Ford E-350 Super Duty applications. The part number 904-231 is also cross-referenced to Monroe Shocks & Struts 172286 and 182286 for the same application.

What This Part Helps Address

• Loss of rail pressure in the diesel oil rail system
• Fuel injector performance issues caused by a leaking or worn rail plug
• Hard starting related to rail pressure retention problems
• Diesel system service needs on Ford E-350 Super Duty, F-250 Super Duty, F-350 Super Duty, and Excursion models
• Replacement of a damaged or corroded original rail plug

Installation Notes and Tips

Verify the vehicle application by year, make, and model before installation. Confirm the male AN thread connection, outside diameter, inside diameter, and tube length match the original component. Clean the rail sealing surfaces and inspect adjacent fuel system components for wear or contamination during service. For 2004-2010 Ford E-350 Super Duty and related Ford diesel applications, use the OE reference and part number 904-231 to confirm the correct replacement.

Quality Assurance

Dorman manufactures replacement hardware and service parts to restore original function on specific vehicle applications. This rail plug is built from durable metal materials and finished for corrosion resistance in diesel fuel system use.