Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2008 Lexus ES 350FACTORY OEM SERVICE PROCEDURE

Fuel Injector: Installation

INSTALL FUEL INJECTOR ASSEMBLY
1. Apply a light coat of spindle oil or gasoline to new O-rings, and install them to each injector.
  
  Fig 1: Identifying Injector O-Rings
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Apply a light coat of spindle oil or gasoline where the fuel delivery pipe contacts the O-ring.
3. Push the fuel injector while turning it to install the injector in the fuel delivery pipe.
4. Position the fuel injector connector outward.
  NOTE:
  - Be careful not to twist the O-ring.
  - After installing the fuel injector, check that it turns smoothly. If not, reinstall it with a new O-ring.
    
    Fig 2: Pushing Fuel Injector & Fuel Delivery Pipe
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Install 6 new insulators to the intake manifold.
  
  Fig 3: Identifying Intake Manifold Insulators
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. Place the fuel delivery pipe which has the 6 fuel injectors installed to it in position on the intake manifold.
  NOTE: Be careful not to drop the fuel injectors when installing the fuel delivery pipe.

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.

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