MKZ AWD V6-3.5L (2008)
1. Release the fuel system pressure.
2. Disconnect the battery ground cable.
3. Remove the upper intake manifold.
4. Disconnect the fuel tube-to-fuel rail spring lock coupling.
5. Disconnect the 6 fuel injector electrical connectors.
6. Remove the 4 fuel rail bolts.
7. Remove the fuel rail and injectors as an assembly.
8. Remove the 6 fuel injector clips and the 6 fuel injectors.
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Remove and discard the 12 fuel injector O-ring seals.
Installation
1. CAUTION: Use O-ring seals that are made of special fuel-resistant material. The use of ordinary O-ring seals can cause the fuel system
to leak. Do not reuse the O-ring seals.
NOTE:
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The upper and lower O-ring seals are not interchangeable.
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Install new fuel injector O-ring seals and lubricate them with clean engine oil.
Install the 6 fuel injectors and the 6 fuel injector clips into the fuel rail.
2. Install the fuel rail and fuel injectors as an assembly.
3. Install the 4 fuel rail bolts.
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Tighten to 10 Nm (89 lb-in).
4. Connect the 6 fuel injector electrical connectors.
5. Connect the fuel tube-to-fuel rail spring lock coupling.
6. Install the upper intake manifold.
7. Connect the battery ground cable.
