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Home >> GMC >> 2018 >> Terrain SL >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Controls And Fuel - 1.5L (LYX) - Repair Instructions >> Repair Instructions >> Fuel Pump Replacement >> Installation Procedure

Installation Procedure

  1. Before continuing, lubricate the cylinder head bore with clean engine oil. Adhesives, Fluids, Lubricants, and Sealers
    2. Fig 1: Valve Lifter Follower
    GM4860358Courtesy of GENERAL MOTORS COMPANY
  2. Lubricate the valve lifter follower (1) with clean engine oil and install it into the cylinder head bore. Adhesives, Fluids, Lubricants, and Sealers
    3. NOTE:
    • The camshaft MUST be at the base circle position before the fuel pump is installed.
    • At the base circle position, the EN-51365  alignment gauge will sit flush with the cylinder head.
  3. Install the EN-51365  alignment gauge (2) and turn the crankshaft until the camshaft lobe is at the base circle position.
  4. Remove the EN-51365  alignment gauge (2) and valve lifter follower (1).
    5. Fig 2: Fuel Pump Housing Seal
    GM4859663Courtesy of GENERAL MOTORS COMPANY
  5. Lubricate the NEW fuel pump housing seal (1) with clean engine oil and install it on the fuel pump. Adhesives, Fluids, Lubricants, and Sealers
    6. Fig 3: Fuel Pump Bolts And Fuel Pump Bolt Retainers
    GM4862457Courtesy of GENERAL MOTORS COMPANY
    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.
  6. Install the NEW fuel pump bolts (1) through the fuel pump bolt retainers (2).
    7. Fig 4: Valve Lifter Follower, Fuel Pump Assembly And Fuel Pump Bolts
    GM4862459Courtesy of GENERAL MOTORS COMPANY
  7. 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. Install the fuel pump assembly (2) into the cylinder head and start the NEW fuel pump bolts (3) 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 (3) to 25 N.m (18 lb ft).
    10. Fig 5: Fuel Pump Insulator And Electrical Connector
    GM4859666Courtesy of GENERAL MOTORS COMPANY
  10. Install the fuel pump insulator (2).
  11. Connect the electrical connector (1).
    12. 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.

  12. Install the NEW fuel feed intermediate pipe. Fuel Feed Intermediate Pipe Replacement 
    13. NOTE:

    The fuel feed front pipe will need to be disconnected after the fuel leak inspection to allow for installation of the intake manifold.

  13. Connect the fuel feed front pipe to the fuel pump. Fuel Feed Front Pipe Replacement 
  14. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection (KL9)
  15. 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.
  16. Relieve the fuel system pressure. Fuel Pressure Relief 
  17. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection (KL9)
  18. Disconnect the fuel feed front pipe from the fuel pump. Fuel Feed Front Pipe Replacement 
  19. Intake Manifold -Intake Manifold Replacement
  20. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection (KL9)
  21. Perform the fuel rail pressure relief valve learned values reset. Fuel Rail Pressure Relief Valve Learned Values Reset 
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