Fuel Injectors & Fuel Rails: Installation
- Install NEW grommets and "O" rings onto injectors. Apply light coat of gasoline to "O" rings and install injectors to fuel rail. See Figure. Install 4 NEW injector insulators and 2 rail spacers in position on cylinder head.
- Place injectors with attached fuel rail into injector ports on cylinder head. Verify injectors rotate smoothly. If injectors do not rotate smoothly, check "O" rings for binding and for proper installation. Replace "O" ring(s) as required. Verify injector electrical connectors are positioned upward and on cam cover side of fuel rail.
- Install fuel rail bolts. Install fuel inlet pipe and pulsation damper. To complete installation, reverse removal procedure. Tighten all nuts and bolts to specification. See TORQUE SPECIFICATIONS . Fill engine with coolant. Engine coolant capacity is 6.7 qts. (6.3L). Check for fuel leakage. See CHECKING FOR FUEL LEAKS .
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
- Install NEW grommet to each fuel injector. Apply a light coat of gasoline to NEW "O" ring and install onto injector. Apply a light coat of gasoline to "O" ring on injector to ease installation into fuel rail.
- Install fuel injectors into fuel rail by turning/twisting fuel injector from left to right in order to bottom injector into fuel rail. See Figure. Place 4 NEW insulators and 2 NEW spacers into position on cylinder head. Insert fuel rail/injector assembly into insulators on cylinder head. Verify fuel injectors rotate smoothly in insulators.
- Position fuel injector electrical connectors upward. Install fuel rail mounting bolts and tighten to 11 ft. lbs. (15 N.m). Connect fuel inlet hose to fuel rail using 2 NEW washer gaskets. Tighten fuel inlet pipe union bolt to 22 ft. lbs. (30 N.m).
- Connect fuel injector connectors. Connect fuel return hose and vacuum hose to fuel pressure regulator. Connect negative battery cable. Check for fuel leakage. See CHECKING FOR FUEL LEAKS .
- Apply light coat of gasoline to NEW "O" rings and install 2 "O" rings to each injector. Install each injector into fuel rail so injector electrical connector is opposite injector cover bolt hole. See Fig 1.
- Install fuel pressure regulator to fuel rail using hand pressure to fully bottom unit into rail. Turn regulator counterclockwise until vacuum pipe aligns with rail and fuel return pipe is 180 degrees from fuel rail. Tighten lock nut to 22 ft. lbs. (30 N.m).
- Install NEW insulator to each injector and install injector cover. Tighten 4 cover bolts to 69 INCH lbs. (7.8 N.m). Connect fuel inlet pipe to fuel rail. Tighten fuel pipe union bolt to 22 ft. lbs. (30 N.m), and fuel line mounting bolt to 69 INCH lbs. (7.8 N.m).
- Install NEW insulator to each injector bottom. Position 3 fuel rail mounting spacers to intake manifold. Install fuel rail, with attached injectors, into intake manifold injector recesses. Install 3 fuel rail mounting bolts and tighten to 14 ft. lbs. (19 N.m).
- Connect fuel return hose and vacuum hose to pressure regulator. Install wiring harness to intake manifold and position to mounting bolts on timing belt cover. Connect Gray colored injector connectors to No. 2 and 4 injectors. Connect Brown colored injector connectors to No. 1 and 3 injectors.
- To complete installation, reverse removal procedure. Tighten all nuts and bolts to specification. See TORQUE SPECIFICATIONS . After installation complete check for fuel leaks. See CHECKING FOR FUEL LEAKS .
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002