1. Remove the fuel rail. Refer to Fuel Injection Fuel Rail Assembly Replacement .
2. Remove the fuel injector retaining clip (521), as required.
3. Remove the fuel injector (533), as required
4. Remove and discard the fuel injector O-ring seals (532, 534), as required.

Important: Do not use the fuel injector O-ring seals again. Install NEW fuel injector O-ring seals during assembly.

1. Lubricate the NEW O-ring seals with clean engine oil.
2. Install the NEW fuel injector O-ring seals (532, 534) onto the injector, as required.
3. Install the fuel injector (533), as required
4. Install the fuel injector retaining clip (521), as required.
5. Install the fuel rail. Refer to Fuel Injection Fuel Rail Assembly Replacement .