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Home >> Cadillac >> 2018 >> Escalade Base, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 2 (Engine Mechanical - 6.0L (L96)) >> Repair Instructions - On Vehicle >> Intake Manifold Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2018 Chevrolet Suburban 3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
  1. If the intake manifold was replaced perform the following steps, otherwise proceed to step 17.
    2. Fig 1: Fuel Rail And Bolts
    GM4331966Courtesy of GENERAL MOTORS COMPANY
  2. Install NEW fuel injector lower O-ring seals onto the injectors.
  3. Lubricate the NEW O-ring seals with clean engine oil.
    4. NOTE:

    Push down firmly on both sides of the rail until all the injectors have been seated into their bores.

  4. Install the fuel rail (2).
    5. CAUTION:

    Refer to Fastener Caution .

  5. Install the fuel rail bolts (1) (Qty: 4) and tighten to 10 N.m (89 lb in).
    6. Fig 2: Throttle Body, Bolts, Nuts And Gasket
    GM4331963Courtesy of GENERAL MOTORS COMPANY
  6. Install a NEW throttle body gasket to the intake manifold (3).
  7. Install the throttle body (4).
  8. Install the throttle body bolts (1) (Qty: 2) and nuts (2) (Qty: 2) and tighten to 10 N.m (89 lb in).
    9. Fig 3: EVAP Tube Quick Connect Fitting And EVAP Canister Purge Solenoid
    GM4331956Courtesy of GENERAL MOTORS COMPANY
  9. Install the EVAP tube (1) and purge solenoid (2).
  10. Install the EVAP canister purge solenoid to the fuel rail bracket and engage the retainer.
  11. Connect the EVAP tube quick connect fitting at the intake manifold. Refer to Plastic Collar Quick Connect Fitting Service
    12. Fig 4: Manifold Absolute Pressure (MAP) Sensor And Retainer
    GM4331948Courtesy of GENERAL MOTORS COMPANY
  12. Lubricate the MAP sensor seal with clean engine oil.
  13. Install the MAP sensor (2).
  14. Install the MAP sensor retainer (1).
    15. Fig 5: Upper Intake Manifold Cover And Nut
    GM4328175Courtesy of GENERAL MOTORS COMPANY
  15. Install the upper intake manifold cover (2).
  16. Install the upper intake manifold cover nut until snug (1).
    17. Fig 6: Intake Manifold Gaskets
    GM4331932Courtesy of GENERAL MOTORS COMPANY
  17. Install NEW intake manifold gaskets (1) to the intake manifold.
  18. Remove the covers from the cylinder head passages.
    19. Fig 7: Intake Manifold And Bolts
    GM4331934Courtesy of GENERAL MOTORS COMPANY
  19. Install the intake manifold (2).
    20. NOTE:

    The aid of an assistant may be helpful in holding the engine harness up out of the way so the upper intake manifold cover does not get caught against the engine harness.

  20. Tighten the intake manifold bolts (1) (Qty: 10) until snug.
    21. Fig 8: Intake Manifold Bolt Tightening Sequence
    GM63222Courtesy of GENERAL MOTORS COMPANY
  21. Tighten the intake manifold bolts to specifications.
    • Tighten the bolts a first pass in the sequence shown to 5 N.m (44 lb in).
    • Tighten the bolts a final pass in the sequence shown to 10 N.m (89 lb in).
    22. Fig 9: Positive Crankcase Ventilation Hose
    GM4332012Courtesy of GENERAL MOTORS COMPANY
  22. Position and install the PCV hose (1) to the intake manifold fitting.
    23. Fig 10: EVAP Canister Purge Tube And Quick Connect Fitting
    GM1696917Courtesy of GENERAL MOTORS COMPANY
  23. Connect the fuel feed line quick connect fitting (2) to the fuel rail. Refer to Metal Collar Quick Connect Fitting Service
  24. Connect the EVAP canister purge tube (1) quick connect fitting to the EVAP canister purge solenoid. Refer to Plastic Collar Quick Connect Fitting Service
    25. Fig 11: Engine Wiring Harness, Clip, Bolt And Connector
    GM1696914Courtesy of GENERAL MOTORS COMPANY
  25. Untie the engine harness branches from the cowl panel and position over the engine.
  26. Position the engine harness clip (1) to the generator bracket and install the bolt (3).

    Tighten the bolt to 9 N.m (80 lb in).

    27. Fig 12: CPA Retainer, Engine Harness Electrical Connectors And Harness Clips
    GM1696893Courtesy of GENERAL MOTORS COMPANY
  27. Connect the engine harness electrical connectors (7) to the right side fuel injectors.
  28. Connect the engine harness electrical connector (3) to the throttle actuator.
    29. Fig 13: CPA Retainer, Electrical Connectors And Engine Harness Clips
    GM1696892Courtesy of GENERAL MOTORS COMPANY
  29. Connect the engine harness electrical connectors (3) to the left side fuel injectors.
    30. Fig 14: Engine Harness Retainer Nut And Electrical Connectors
    GM1696891Courtesy of GENERAL MOTORS COMPANY
  30. Connect the engine wiring harness electrical connector (4) to the MAP sensor.
  31. Connect the engine harness electrical connector (2) to the EVAP canister purge solenoid.
  32. Install the engine harness retainer to the stud and locator pin.
  33. Install the engine harness retainer nut (1) and tighten to 5 N.m (44 lb in).
  34. Install the generator. Refer to Generator Replacement (L96)
  35. Install the air cleaner resonator outlet duct. Refer to Air Cleaner Resonator Outlet Duct Replacement
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