Fuel Injection Fuel Rail Assembly Replacement - Bank 1 - LF1, LFW
Special Tools
EN-49248 Injector Rail Assembly Remover
For equivalent regional tools, refer to
Special Tools : Diagnostic Tools Diesel .
Removal Procedure
- Relieve the fuel system pressure. Refer to Fuel Pressure Relief .
- Remove the fuel pipe shield. Refer to
Fuel Pipe Shield Replacement : LF1 or LFW .
- Remove the intake manifold. Refer to Inlet Manifold Replacement .
- Remove the fuel feed intermediate pipe. Refer to
Fuel Feed Intermediate Pipe Replacement : LF1 or LFW .
- Remove the foam insulator from the fuel rails.
- Cut the plastic tie strap (1).
- Disconnect the fuel pressure sensor electrical connector (2).
- Remove the fuel pressure sensor (3).
- Remove the left side fuel rail fasteners (1).
- Remove the right side fuel rail fasteners (1) for clearance purposes.
- Using the EN-49248-4 hook , raise the fuel rail (1) as an assembly.
- Once the fuel rail is free, remove the EN-49248 special tool .
- Slide the fuel rail (1) toward the front of the engine approximately 1 inch (25.4 mm), in order to clear the center injector bore.
Note: The direct fuel injectors must be rebuilt whenever the injector has been released from the fuel rail or cylinder head.
- Once the fuel rail is removed, remove the fuel injectors and rebuild them. Refer to
Fuel Rail and Injectors Cleaning and Inspection : LF1, LFW or LFX .
Installation Procedure
- Slide the fuel rail (1) toward the rear of the engine approximately 1 inch (25.4 mm), in order to align the center injector bore.
Caution: Refer to Fastener Caution in the Preface section.
- Hand tighten the two outer fuel rail fasteners to seat the injectors.
- Start and hand tighten the remaining fuel rail fasteners.
- Tighten the fuel rail fasteners in the sequence shown above:
4.1. | First pass 12 N·m (106 lb in). |
4.2. | Final pass 23 N·m (17 lb ft). |
- Tighten the fuel pressure sensor (3) to 33 N·m (25 lb ft).
- Connect the fuel pressure sensor electrical connector (2) and secure it with a new plastic zip tie.
- Install the fuel feed intermediate pipe. Refer to
Fuel Feed Intermediate Pipe Replacement : LF1 or LFW .
- Inspect for fuel leaks using the following procedure:
8.1. | Turn ON the ignition, with the engine OFF for 2 seconds. |
8.2. | Turn OFF the ignition, for 10 seconds. |
8.3. | Turn ON the ignition, with the engine OFF. |
8.4. | Inspect for fuel leaks. |
- Install the foam insulator to the fuel rails.
- Install the inlet manifold. Refer to Inlet Manifold Replacement .
- Install the fuel pipe shield. Refer to
Fuel Pipe Shield Replacement : LF1 or LFW .
- Install the low side fuel pressure service port cap.
- Install the fuel tank cap.
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