Fuel Injector: Service and Repair

1. Release fuel pressure to zero.







2. Remove intake manifold collector. Refer to "TMING CHAIN".
3. Remove fuel tube assemblies in numerical sequence as shown in the figure.
4. Expand and remove clips securing fuel injectors.
5. Extract fuel injectors straight from fuel tubes.
- Be careful not to damage injector nozzles during removal.
- Do not bump or drop fuel injectors.
- Do not disassemble or adjust fuel injectors.
6. Carefully install O-rings, including the one used with the pressure regulator.
- Use bare hands to install O-rings. Do not wear gloves.
- Apply a coat of engine oil (with a low viscosity of 5W-30, etc.) to O-rings before installation.
- Do not use solvent to clean O-rings and other Parts.
- Make sure that O-rings and other parts are clean and free from foreign particles.
- Be careful not to damage O-rings with service tools or finger nails. Do not expand or twist O-rings. If stretched, do not insert them into fuel tubes immediately after stretching.
- Always insert O-rings straight into fuel tubes. Do not tilt or rotate them during installation.
7. Position clips in grooves on fuel injectors.
- Make sure that protrusions of fuel injectors are aligned with cutouts of clips after installation.




8. Align protrusions of fuel tubes with those of fuel injectors. Insert fuel injectors straight into fuel tubes.
9. After properly inserting fuel injectors, check to make sure that fuel tube protrusions are engaged with those of fuel injectors, and that flanges of fuel tubes are engaged with clips.
- Discard old clips; replace with new ones.




10. Tighten fuel tube assembly mounting nuts in numerical sequence (indicated in the figure at left) and in two stages.

Tightening torque Nm (kg.m, ft.lb)
1st stage: 9.3 - 10.8 (1.0 - 1.1, 6.9 - 7.9)
2nd stage: 20.6 - 26.5 (2.1 - 2.7, 16 - 19)

11. Install all parts removed in reverse order of removal.

CAUTION: After properly connecting fuel tube assembly to injector and fuel hose, check connection for fuel leakage.