Fuel Injection Fuel Rail Crossover Tube Replacement

Fuel Injection Fuel Rail Crossover Tube Replacement (LLT)

Removal Procedure

1. Remove the fuel injection sight shield. Refer to Fuel Injector Sight Shield Replacement Fuel Injector Sight Shield Replacement.

2. Remove the high pressure pump shield. Refer to Fuel Pipe Shield Replacement Fuel Pipe Shield Replacement.

3. Relieve the fuel system pressure. Refer to Fuel Pressure Relief (Without CH-48027) Fuel Pressure Relief (Without CH-48027)Fuel Pressure Relief (CH-48027) Fuel Pressure Relief (CH-48027)Fuel Pressure Relief (High Side) Fuel Pressure Relief (High Side).




4. Loosen the fuel rail crossover pipe (1) fitting to the right fuel rail (2).

5. Loosen the fuel rail crossover pipe (1) fitting to the left fuel rail (3).

6. Remove the fuel rail crossover pipe (1) from the vehicle. Discard the pipe.

Installation Procedure

1. Ensure that the fuel rail crossover pipe, right fuel rails fittings and left fuel rail fittings are clean and dry prior to assembly.

2. Lubricate the pipes with silicon free engine oil GM P/N 12345610 (Canadian P/N 993193) or equivalent.




3. Position the fuel rail crossover pipe (1) to the right fuel rails fitting (2) and left fuel rail fitting (3).

Caution: Refer to Fastener Caution Fastener Caution.

4. Tighten the fuel rail crossover pipe fittings.

1. Tighten the fittings first pass to 16 Nm (12 lb ft).

2. Tighten the fittings final pass to 32 Nm (24 lb ft).

Note: If a fuel leak accrues at the right fuel rail fitting (2) or left fuel rail fitting (3), that component will need to be replaced.

5. Inspect for leaks using the following procedure:

1. Turn ON the ignition, with the engine OFF for 2 seconds.

2. Turn OFF the ignition, for 10 seconds.

3. Turn ON the ignition, with the engine OFF.

4. Inspect for fuel leaks.

6. Install the low side fuel pressure service port cap.

7. Install the fuel tank cap.

8. Install the high pressure pump shield. Refer to Fuel Pipe Shield Replacement Fuel Pipe Shield Replacement.

9. Install the fuel injection sight shield. Refer to Fuel Injector Sight Shield Replacement Fuel Injector Sight Shield Replacement.