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Home >> Chevrolet >> 2018 >> Traverse RS >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Controls And Fuel - 2.0L (LTG) - Repair Instructions >> Repair Instructions >> Fuel Pump Replacement >> Installation Procedure
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Installation Procedure

  1. GM4787850
    NOTE:
    • The camshaft MUST be at the base circle position before the fuel pump is installed.
    • At the base circle position, the EN-50790  alignment gauge will sit flush with the cylinder head.

    Install the EN-50790  alignment gauge (1) and turn the crankshaft until the camshaft lobe is at the base circle position.

  2. Remove the EN-50790  alignment gauge (1).
  3. GM4790876

    Lubricate the NEW fuel pump housing seal (1) with clean engine oil and install it on the fuel pump. Adhesives, Fluids, Lubricants, and Sealers

  4. Before continuing, lubricate the cylinder head bore with clean engine oil. Adhesives, Fluids, Lubricants, and Sealers
  5. GM4790880
    CAUTION:

    This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.

    NOTE:
    • ALWAYS make sure the fuel pump bolt retainers are present before installing the fuel pump bolts.
    • If ANY fuel pump bolt retainers are missing or NOT suitable for reuse, replace the retainers as necessary.

    Install the NEW fuel pump bolts (1) through the fuel pump bolt retainers (2).

  6. Install the NEW fuel pump bracket gasket (3) to the fuel pump bolts (1) and the fuel pump (4).
  7. GM4790884

    Lubricate the valve lifter follower (1) again with clean engine oil, if necessary, and install it into the cylinder head bore. Adhesives, Fluids, Lubricants, and Sealers

  8. GM4790885

    Install the fuel pump assembly (1) into the cylinder head and start the NEW fuel pump bolts (2) by hand.

    9. CAUTION:

    Refer to Fastener Caution .

    CAUTION:

    Alternately hand-tighten the fuel pump bolts one turn at a time until the pump is fully seated. Trying to draw down the pump without even side-to-side tightening may result in pump plunger damage.

  9. Tighten the NEW fuel pump bolts (2) to:
    1. First Pass: 8 N.m (71 lb in)
    2. Final Pass: 50 degrees
    10. NOTE:

    High pressure fuel feed pipes are one time use only. ALWAYS install a NEW high pressure fuel feed pipe if the pipe is removed OR the fittings are loosened.

  10. Install the NEW fuel feed intermediate pipe. Fuel Feed Intermediate Pipe Replacement 
    11. NOTE:

    ONLY connect the fuel feed front pipe. Do NOT continue with the remaining component installation steps until after the fuel leak inspection has been completed.

  11. Connect the fuel feed front pipe to the fuel pump. Fuel Feed Front Pipe Replacement 
  12. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection (KL9)
    13. NOTE:

    The wiring harness electrical connector at the fuel pump will need to be temporarily connected to check for fuel leaks.

  13. 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.
  14. After verifying that no fuel leaks exist, continue installing the remaining components previously removed.
  15. If replacing, perform the fuel rail pressure relief valve learned values reset. Fuel Rail Pressure Relief Valve Learned Values Reset (LTG) 
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