3.5 LITER. ECOBOOST. Motor mount nut. Right. A solid metal or plastic block with a threaded hole in the center which is used to tighten or adjust the Suspension Leaf Spring. Nut for the Engine Mount. Part cannot be reused/reinstalled. Rack and Pinion Nut. AND Washer Assembly -. Bracket. Engine. Gear Assembly. Leaf Spring. Motor retainer. Spacer retainer. Support. U - bolt.