Mariner 4WD V6-3.0L (2010)
Fuel Rail: Service and Repair
Fuel Rail
Fuel Rail
Removal
WARNING: Do not smoke, carry lighted tobacco or have an open flame of any type when working on or near any fuel-related component.
Highly flammable mixtures are always present and may be ignited. Failure to follow these instructions may result in serious personal injury.
WARNING: Before working on or disconnecting any of the fuel tubes or fuel system components, relieve the fuel system pressure to prevent
accidental spraying of fuel. Fuel in the fuel system remains under high pressure, even when the engine is not running. Failure to follow this
instruction may result in serious personal injury.
WARNING: Clean all fuel residue from the engine compartment. If not removed, fuel residue may ignite when the engine is returned to
operation. Failure to follow this instruction may result in serious personal injury.
WARNING: Always disconnect the battery ground cable at the battery when working on an evaporative emission (EVAP) system or
fuel-related component. Highly flammable mixtures are always present and may be ignited. Failure to follow these instructions may result in
serious personal injury.
1. Release the fuel system pressure. For additional information, refer to Fuel Delivery and Air Induction.
2. Disconnect the battery ground cable. For additional information, refer to Battery.
3. Remove the upper intake manifold. For additional information, refer to Engine.
4. Disconnect the fuel jumper tube-to-fuel rail quick connect coupling. For additional information, refer to Fuel Delivery and Air Induction.
5. Release the 4 wire harness pin-type retainers from the fuel rail.
6. Release the engine wire harness and the fuel charging wire harness pin-type retainers from the fuel rail.
7. Disconnect the 6 fuel injector electrical connectors.
8. Remove the 4 fuel rail bolts.
9. Remove the fuel rail and injectors as an assembly.
10. Remove the 6 clips and the fuel injectors.
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Remove and discard the 12 fuel injector O-ring seals.
Installation
1. NOTICE: Use O-ring seals that are made of special fuel-resistant material. Use of ordinary O-rings can cause the fuel system to leak. Do
not reuse the O-ring seals.
NOTE: The upper and lower fuel injector O-ring seals are similar in appearance, but are not interchangeable.
NOTE: Install new fuel injector O-ring seals and lubricate them with clean engine oil.
Install the 6 fuel injectors and clips on the fuel rail.
2. Position the fuel rail and install the bolts.
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Tighten to 10 Nm (89 lb-in).
3. Connect the engine wire harness and the fuel charging wire harness pin-type retainers to the fuel rail.
