Fuel Rails & Fuel Injectors: Installation

To install, reverse removal procedure using NEW grommets, "O" rings, insulators and gaskets. Coat "O" rings with gasoline before installing "O" rings on fuel injectors. Use twisting motion when installing fuel injectors on fuel rail. Ensure the 4 insulators are installed on spacers on the cylinder head.
When installing fuel rail, install fuel rail with fuel injectors on cylinder head. Loosely install fuel rail-to-cylinder head bolts.
Ensure fuel injectors rotate smoothly. If fuel injectors fail to rotate smoothly, check for improper "O" ring installation. Ensure electrical connector on each fuel injector is facing upward, toward the intake manifold.
Tighten fuel rail-to-cylinder head bolts to specification. See TORQUE SPECIFICATIONS . To install remaining components, reverse removal procedure.
Operate fuel pump and check for fuel leaks. See FUEL PUMP OPERATION under FUEL SYSTEM in BASIC TESTING - 2.7L article.

Fig 1: Exploded View Of Fuel Rail & Components (Tacoma Shown; T100 Is Similar)