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Home >> Lexus >> 1998 >> SC 400 >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Engine Controls - Remove/Install/Overhaul >> Fuel System >> Fuel Rails & Injectors >> Installation (LS400)
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Installation (LS400)

  1. Install NEW insulators and grommets on injectors. Apply a light coat of gasoline to NEW fuel injector "O" rings. Install "O" rings. Using a twisting motion, push injectors into fuel rail. Ensure injectors are fully seated in fuel rail. Ensure fuel injector connectors are positioned outward.
  2. Install 4 spacers in position on intake manifold. Place injectors and fuel rail assembly on to intake manifold. Temporarily install fuel rail-to-intake manifold nuts.
  3. Ensure injectors rotate smoothly. If injectors do not rotate smoothly, "O" rings were installed incorrectly and may be pinched. Replace "O" rings. Position injector connectors outward. Tighten fuel rail-to-intake manifold nuts. Connect injector connectors. Install NEW fuel pressure pulsation damper "O" rings.
  4. To complete installation, reverse removal procedure. Tighten fuel rail mounting bolts to specification. See TORQUE SPECIFICATIONS . Fill cooling system. Start engine and inspect for fuel and coolant leaks.
Fig 1: Removing Pulsation Dampers & Gaskets (LS400)
G98H10410Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: Removing Fuel Injectors & Fuel Rails (LS400)
G98J10420Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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