Dorman 579-096 Fuel Tank Sending Unit Lock Ring

Dorman 579-096 Fuel Tank Sending Unit Lock Ring

Dorman 579-096 is a fuel tank sending unit lock ring made for secure retention of the fuel pump assembly at the tank opening. It is a direct-fit service part for fuel system repairs on select Ford and Mercury applications, including Ford E-150 Econoline, Ford Explorer, and Mercury Mountaineer.

Key Features

• Rubber construction for dependable service in fuel tank applications
• Inside diameter: 3.93 in; outside diameter: 5.47 in
• Lock ring diameter: 5.47 in
• Gasket or seal included for service replacement
• Mounting hardware included
• Recommended whenever the sending unit is serviced

Detailed Description

This Dorman fuel tank sending unit lock ring secures the fuel pump assembly to the tank lock interface and helps maintain a proper seal at the sending unit opening. The rubber material supports reliable fitment and service life, while the included gasket or seal helps complete the repair. Dorman 579-096 is a practical replacement choice for fuel system maintenance on 1997-2002 Ford E-150 Econoline, 1997-2002 Ford E-150 Econoline Club Wagon, 1997-2002 Ford E-250 Econoline, 1997-2002 Ford E-350 Econoline Club Wagon, 1999-2002 Ford Econoline, 1997-2000 Ford Explorer, and 1997-2000 Mercury Mountaineer. This part cross-references Spectra Premium LO96 for the same application.

What It Helps Fix

• Loose or worn fuel pump retaining ring at the tank opening
• Fuel odor caused by an imperfect sending unit seal
• Service issues after fuel pump or sending unit replacement
• Retention problems on bolt-on type Explorer and Mountaineer applications
• Fitment concerns on select Ford Econoline van fuel tank service jobs

Installation Notes and Tips

Inspect the tank flange, sending unit seal surface, and lock ring groove before installation. Replace damaged sealing surfaces and confirm the ring seats evenly during assembly. Verify application details for your vehicle, especially on 2001 Ford Explorer and 2001 Mercury Mountaineer bolt-on type configurations, as well as 1997-1998 Ford F-150, 1997-1998 Ford F-250, 1997 Ford F-250 HD, and 1999-2000 Ford E-350 Super Duty listings.

Quality Assurance

Dorman manufactures replacement hardware with durable materials for reliable service in fuel system repairs. Part number 579-096 is built to support routine sending unit service on the listed Ford and Mercury applications.