10. Install the muffler and tailpipe. Refer to: Muffler and Tailpipe (309-00D Exhaust System - 5.2L 32V Ti-VCT, Removal and Installation).
11. NOTE: Inspect the surfaces of the Fuel Pump and Sender Unit flange and fuel tank O-ring seal contact surfaces. Do not polish or adjust the O-ring seal contact area of the fuel tank flange or the fuel tank. Install a new Fuel Pump and Sender Unit or fuel tank if the O-ring seal contact area is bent, scratched or corroded.
Install a new O-ring seal.
12. NOTICE: Carefully install the Fuel Tank Sender Unit lock ring wrench to avoid damage to the Fuel
Pump and Sender Unit when removing the lock ring.
Using the special tool install the Fuel Pump and Sender Unit lock ring. Use Special Service Tool: 310-123 Locking Ring, Fuel Tank.
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.