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Fuel Rails & Fuel Injectors: Installation

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  1. To install, reverse removal procedure using NEW grommets and "O" rings. Coat "O" ring with gasoline before installing "O" ring on fuel injector.
  2. Coat fuel rail "O" ring contact area with gasoline before installing fuel injector on fuel rail. Use twisting motion when installing fuel injector on fuel rail. Ensure electrical connector on each fuel injector is facing downward, toward intake manifold and the 2 spacers are installed on cylinder head before installing fuel rail.
  3. Install fuel rail with fuel injectors on cylinder head with fuel rail-to-cylinder head bolts loosely installed. Ensure fuel injectors rotate smoothly. If fuel injectors do not rotate smoothly, check for improper "O" ring installation and replace "O" ring on fuel injector.
  4. Ensure electrical connector on each fuel injector is facing downward, toward intake manifold. Tighten fuel rail-to-cylinder head bolts to specification. See TORQUE SPECIFICATIONS .
  5. To install remaining components, reverse removal procedure. Pull on fuel pipe to ensure fuel pipe is properly locked on fuel pipe fitting.
  6. Pull on fuel pipe to ensure fuel pipe is properly locked on fuel pipe fitting.
  7. Operate fuel pump and check for fuel leaks. See FUEL SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - 4-CYLINDER article.
Fig 1: Exploded View Of Fuel Rail & Components (Camry & Camry Solara)
G00035225Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: Locating Fuel Pipe Clamp & Disconnecting Fuel Pipe From Fuel Pipe Fitting (Camry)
G00023074Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002


  1. To install, reverse removal procedure using NEW grommets and "O" rings. Coat "O" ring with gasoline before installing "O" ring on fuel injector.
  2. Coat fuel rail "O" ring contact area with gasoline before installing fuel injector on fuel rail. Use twisting motion when installing fuel injector on fuel rail. Ensure electrical connector on each fuel injector is facing downward, toward intake manifold and the 2 spacers are installed on cylinder head before installing fuel rail. Coat grommet contact surfaces with gasoline before installing fuel rail with fuel injectors.
  3. Install fuel rail with fuel injectors on cylinder head with fuel rail-to-cylinder head bolts loosely installed. Ensure fuel injectors rotate smoothly. If fuel injectors do not rotate smoothly, check for improper "O" ring installation and replace "O" ring on fuel injector.
  4. Ensure electrical connector on each fuel injector is facing downward, toward intake manifold. Tighten fuel rail-to-cylinder head bolts to specification. See TORQUE SPECIFICATIONS .
  5. To install remaining components, reverse removal procedure. Operate fuel pump and check for fuel leaks. See FUEL SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - 4-CYLINDER article.


  1. To install, reverse removal procedure using NEW grommets and "O" rings. Coat "O" ring with gasoline before installing "O" ring on fuel injector.
  2. Coat fuel rail "O" ring contact area with gasoline before installing fuel injector on fuel rail. Use twisting motion when installing fuel injector on fuel rail. Ensure electrical connector on each fuel injector is facing toward valve cover and the 2 spacers are installed on cylinder head before installing fuel rail. Coat grommet contact surfaces with gasoline before installing fuel rail with fuel injectors. See Fig 1.
  3. Install fuel rail with fuel injectors on cylinder head with fuel rail-to-cylinder head bolts loosely installed. Ensure fuel injectors rotate smoothly. If fuel injectors do not rotate smoothly, check for improper "O" ring installation and replace "O" ring on fuel injector.
  4. Ensure electrical connector on each fuel injector is facing toward valve cover. Tighten fuel rail-to-cylinder head bolts and fuel pipe clamp-to-cylinder head bolt to specification. See TORQUE SPECIFICATIONS .
  5. Install No. 2 cylinder head cover.
    CAUTION: DO NOT reuse old retainer when installing fuel pipe on fuel pipe fitting. Always use a NEW retainer.
  6. Apply light coat of engine oil on tip of fuel pipe fitting to allow for ease of disconnect fitting and fuel pipe installation. Using NEW retainer, install fuel pipe on fuel pipe fitting until "click" sound is heard. DO NOT reuse old retainer. Pull on fuel pipe to ensure fuel pipe is properly locked on fuel pipe fitting.
  7. Reinstall fuel pipe clamp. Operate fuel pump and check for fuel leaks. See FUEL SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - 4-CYLINDER article.
Fig 1: Exploded View Of Fuel Rail & Components (Celica, Corolla & Matrix)
G00227895Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002


  1. To install, reverse removal procedure using NEW grommets and "O" rings. Coat "O" ring with gasoline before installing "O" ring on fuel injector.
  2. Coat fuel rail "O" ring contact area with gasoline before installing fuel injector on fuel rail. Use twisting motion when installing fuel injector on fuel rail. Ensure electrical connector on each fuel injector is facing toward valve cover and the 2 spacers are installed on cylinder head before installing fuel rail. Coat grommet contact surfaces with gasoline before installing fuel rail with fuel injectors.
  3. Install fuel rail with fuel injectors on cylinder head with fuel rail-to-cylinder head bolts loosely installed. Ensure fuel injectors rotate smoothly. If fuel injectors do not rotate smoothly, check for improper "O" ring installation and replace "O" ring on fuel injector.
  4. Ensure electrical connector on each fuel injector is facing toward valve cover. Tighten fuel rail-to-cylinder head bolts and fuel pipe clamp-to-cylinder head bolt to specification. See TORQUE SPECIFICATIONS .
  5. Apply sealant at specified areas on cylinder head before installing gasket and valve cover. See Fig 3.
  6. Using NEW seal washers, install valve cover bolts/nuts. Tighten valve cover bolts/nuts to specification in sequence. See TORQUE SPECIFICATIONS . See Fig 4.
  7. Install ignition coils and tighten ignition coil bolts to specification. See TORQUE SPECIFICATIONS .
  8. Install No. 2 cylinder head cover.
    CAUTION: DO NOT reuse old retainer when installing fuel pipe on fuel pipe fitting. Always use a NEW retainer.
  9. Apply light coat of engine oil on tip of fuel pipe fitting to allow for ease of disconnect fitting and fuel pipe installation. Using NEW retainer, install fuel pipe on fuel pipe fitting until "click" sound is heard. DO NOT reuse old retainer. Pull on fuel pipe to ensure fuel pipe is properly locked on fuel pipe fitting.
  10. Reinstall fuel pipe clamp.
  11. Operate fuel pump and check for fuel leaks. See FUEL SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - 4-CYLINDER article.
Fig 1: Exploded View Of Fuel Rail & Components (ECHO)
G00009755Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: Disconnecting Fuel Pipe From Fuel Pipe Fitting (ECHO)
G99D52376Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 3: Identifying Valve Cover Sealant Application Areas (ECHO & Prius)
G98A11221Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 4: Valve Cover Bolt/Nut Tightening Sequence (ECHO & Prius)
G99A52860Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002


  1. To install, reverse removal procedure using NEW insulators and "O" rings. Coat "O" ring with gasoline before installing "O" ring on fuel injector.
  2. Coat fuel rail "O" ring contact area with gasoline before installing fuel injector on fuel rail. Use twisting motion when installing fuel injector on fuel rail. Ensure electrical connector on each fuel injector is facing downward, toward intake manifold and the 2 spacers are installed on cylinder head before installing fuel rail.
  3. Install fuel rail with fuel injectors on cylinder head with fuel rail-to-cylinder head bolts loosely installed. Ensure fuel injectors rotate smoothly. If fuel injectors do not rotate smoothly, check for improper "O" ring installation and replace "O" ring on fuel injector.
  4. Ensure electrical connector on each fuel injector is facing downward, toward intake manifold. Tighten fuel rail-to-cylinder head bolts to specification. See TORQUE SPECIFICATIONS .
  5. Install fuel pipe on fuel pipe fitting. Pull on fuel pipe to ensure fuel pipe is properly locked on fuel pipe fitting. Reinstall fuel pipe clamp. Operate fuel pump and check for fuel leaks. See FUEL SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - 4-CYLINDER article.
Fig 1: Exploded View Of Fuel Rail & Components (Highlander)
G00015543Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002


  1. To install, reverse removal procedure using NEW grommets and "O" rings. Coat "O" ring with gasoline before installing "O" ring on fuel injector.
  2. Coat fuel rail "O" ring contact area with gasoline before installing fuel injector on fuel rail. Use twisting motion when installing fuel injector on fuel rail. Ensure electrical connector on each fuel injector is facing toward valve cover and the 2 spacers and 4 grommets are installed on cylinder head before installing fuel rail.
  3. Install fuel rail with fuel injectors on cylinder head with fuel rail-to-cylinder head bolts loosely installed. Ensure fuel injectors rotate smoothly. If fuel injectors do not rotate smoothly, check for improper "O" ring installation and replace "O" ring on fuel injector.
  4. Ensure electrical connector on each fuel injector is facing toward valve cover.
  5. Tighten fuel rail-to-cylinder head bolts and suspension upper brace bolts/nuts to specification. See TORQUE SPECIFICATIONS .
  6. Operate fuel pump and check for fuel leaks. See FUEL SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - 4-CYLINDER article.
Fig 1: Exploded View Of Fuel Rail & Components (MR2)
G00015547Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002


  1. To install, reverse removal procedure using NEW grommets and "O" rings. Coat "O" ring with gasoline before installing "O" ring on fuel injector.
  2. Coat fuel rail "O" ring contact area with gasoline before installing fuel injector on fuel rail. Use twisting motion when installing fuel injector on fuel rail. Ensure electrical connector on each fuel injector is facing toward valve cover and the 2 spacers are installed on cylinder head before installing fuel rail. Coat grommet contact surfaces with gasoline before installing fuel rail with fuel injectors.
  3. Install fuel rail with fuel injectors on cylinder head with fuel rail-to-cylinder head bolts loosely installed. Ensure fuel injectors rotate smoothly. If fuel injectors do not rotate smoothly, check for improper "O" ring installation and replace "O" ring on fuel injector.
  4. Ensure electrical connector on each fuel injector is facing toward valve cover. Tighten fuel rail-to-cylinder head bolts and fuel pipe clamp-to-cylinder head bolt to specification. See TORQUE SPECIFICATIONS .
  5. Apply sealant at specified areas on cylinder head before installing gasket and valve cover. See Figure.
  6. Install valve cover bolts/nuts. Tighten valve cover bolts/nuts to specification in sequence. See TORQUE SPECIFICATIONS . See Figure.
  7. Install ignition coils and tighten ignition coil bolts to specification. See TORQUE SPECIFICATIONS .
    8. CAUTION: DO NOT reuse old retainer when installing fuel pipe on fuel pipe fitting. Always use a NEW retainer.
  8. Apply light coat of engine oil on tip of fuel pipe fitting to allow for ease of disconnect fitting and fuel pipe installation. Using NEW retainer, install fuel pipe on fuel pipe fitting until "click" sound is heard. DO NOT reuse old retainer. Pull on fuel pipe to ensure fuel pipe is properly locked on fuel pipe fitting.
  9. Reinstall air cleaner assembly. Operate fuel pump and check for fuel leaks. See FUEL SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - 4-CYLINDER article.
Fig 1: Exploded View Of Fuel Rail & Components (Prius)
G00015551Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: Locating Fuel Pipe, Disconnect Fitting & Disconnecting Fuel Pipe From Fuel Pipe Fitting (Prius)
G00011396Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002


  1. To install, reverse removal procedure using NEW grommets and "O" rings. Coat "O" ring with gasoline before installing "O" ring on fuel injector.
  2. Coat fuel rail "O" ring contact area with gasoline before installing fuel injector on fuel rail. Use twisting motion when installing fuel injector on fuel rail. Ensure electrical connector on each fuel injector is facing away from valve cover and the 2 spacers and 4 grommets are installed on cylinder head before installing fuel rail.
  3. Install fuel rail with fuel injectors on cylinder head with fuel rail-to-cylinder head bolts loosely installed. Ensure fuel injectors rotate smoothly. If fuel injectors do not rotate smoothly, check for improper "O" ring installation and replace "O" ring on fuel injector.
  4. Ensure electrical connector on each fuel injector is facing away from valve cover. Tighten fuel rail-to-cylinder head bolts to specification. See TORQUE SPECIFICATIONS .
  5. Operate fuel pump and check for fuel leaks. See FUEL SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - 4-CYLINDER article.
Fig 1: Exploded View Of Fuel Rail & Components (RAV4)
G00015555Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002


  1. To install, reverse removal procedure using NEW grommets, "O" rings, insulators and gaskets. Coat "O" ring with gasoline before installing "O" ring on fuel injector. Coat fuel rail "O" ring contact area with gasoline before installing fuel injector on fuel rail.
  2. Use twisting motion when installing fuel injector on fuel rail. Ensure electrical connector on each fuel injector is facing toward intake manifold and the 4 insulators are installed on spacers on the cylinder head. See Fig 2.
  3. With fuel rail installed, 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 and replace "O" ring on fuel injector.
  4. Ensure electrical connector on each fuel injector is facing toward intake manifold. Tighten fuel rail-to-cylinder head bolts and fuel inlet pipe-to-fuel rail union bolt to specification. See TORQUE SPECIFICATIONS .
  5. Operate fuel pump and check for fuel leaks. See FUEL SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - 4-CYLINDER article.
Fig 1: Exploded View Of Fuel Rail & Components (Tacoma)
G00015559Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: Locating Insulators (Tacoma)
G98E11944Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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