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Home >> Chevrolet >> 2017 >> SS Automatic Trans >> Repair and Diagnosis >> Engine Mechanical >> Engine Mechanical - 6.2L (LS3) >> Repair Instructions - On Vehicle >> Intake Manifold Replacement >> Installation Procedure

Installation Procedure

    Fig 1: Intake Manifold To Cylinder Head Gaskets
    GM1954080Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • The intake manifold, throttle body, fuel injection rail, and fuel injectors may be removed as an assembly. If not servicing the individual components, install the intake manifold as a complete assembly.
    • DO NOT use the intake manifold gaskets again. Install NEW intake manifold-to-cylinder head gaskets.
  1. Install NEW intake manifold-to-cylinder head gaskets (1).
    2. Fig 2: Intake Manifold, Bolts & Fuel Rail Stop Brackets
    GM3289839Courtesy of GENERAL MOTORS COMPANY
  2. Install the intake manifold (3).
  3. Apply a 5 mm (0.20 in) band of threadlock to the threads of the intake manifold bolts (1). Refer to Adhesives, Fluids, Lubricants, and Sealers  for recommended threadlock.
  4. Install the intake manifold bolts (1) and fuel rail stop brackets (2).
    5. Fig 3: Intake Manifold Bolts Tightening Sequence
    GM1876009Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

  5. Tighten the intake manifold bolts.
    1. Tighten the intake manifold bolts (1 - 10) a first pass in sequence to 5 N.m (44 lb in).
    2. Tighten the intake manifold bolts (1 - 10) a final pass in sequence to 10 N.m (89 lb in).
    6. Fig 4: Right Side Fuel Injector Wiring Harness Connectors
    GM1954087Courtesy of GENERAL MOTORS COMPANY
  6. Position the right side fuel injector wiring harness (4) on the intake manifold (2).
  7. Connect the MAP sensor wiring harness connector (3) to the MAP sensor.
  8. Connect the canister purge valve wiring harness connector (5).
  9. Connect the right side ignition coil main connector (6) to the ignition coil wiring harness.
  10. Install the CPA lock (7) from the right side ignition coil main connector (6).
  11. Connect the right side fuel injector wiring harness connectors (1) to the fuel injectors.
    12. Fig 5: Left Side Fuel Injector Wiring Harness Connectors
    GM1954086Courtesy of GENERAL MOTORS COMPANY
  12. Position the left side fuel injector wiring harness (5) back to its original location the intake manifold (1).
  13. Connect the left side ignition coil main connector (3) ignition coil wiring harness.
  14. Install the CPA lock (4) from the left side ignition coil main connector (3).
  15. Connect the left side fuel injector wiring harness connectors (2) to the fuel injectors.
    16. Fig 6: Camshaft Position Sensor Connector, Coolant Temperature Sensor Connector & Engine Lifting Bracket
    GM1954088Courtesy of GENERAL MOTORS COMPANY
  16. Connect the camshaft position sensor connector (4) to the camshaft sensor.
  17. Connect the coolant temperature sensor connector (3) to the coolant sensor.
  18. Attach the wiring harness retaining clip (2) to the engine lifting bracket (1).
    19. Fig 7: HVAC Vacuum Hose & Oil Pressure Sensor Wiring Harness Connector
    GM1954090Courtesy of GENERAL MOTORS COMPANY
  19. Connect the oil pressure sensor wiring harness connector (1) to the oil pressure sensor.
  20. Connect the HVAC vacuum hose (2) to the intake manifold.
    21. Fig 8: Intake Manifold Vacuum Port, Vacuum Hose & Retaining Clamp
    GM1946557Courtesy of GENERAL MOTORS COMPANY
  21. Compress the vacuum hose retaining clamp (2) at the intake manifold vacuum port (1) and slide 50 mm (2 in) back along the vacuum hose (3).
  22. Connect the vacuum hose (3) to the intake manifold vacuum port (1).
    23. Fig 9: Alternator Wiring Harness Connector
    GM1954054Courtesy of GENERAL MOTORS COMPANY
  23. Connect the alternator wiring harness connector (1) to the alternator.
    24. Fig 10: Locating PCV Hose, Intake Manifold & Valley Cover
    GM1954091Courtesy of GENERAL MOTORS COMPANY
  24. Connect the PCV hose (3) to the intake manifold (1) and the valley cover (2).
    25. Fig 11: Electronic Throttle Body Wiring Harness Connector
    GM1954085Courtesy of GENERAL MOTORS COMPANY
  25. Connect the electronic throttle body wiring harness connector (1) to the throttle body.
    26. Fig 12: Locating Fuel Tank Hose, EVAP Purge Valve & Hose
    GM1954083Courtesy of GENERAL MOTORS COMPANY
  26. Remove the plug on the throttle body to EVAP purge valve hose (3) and EVAP purge valve (1) ends.
  27. Connect the throttle body to EVAP purge valve hose (3) to the EVAP purge valve (1).
  28. Remove the plug on the throttle body to the EVAP purge valve to fuel tank hose (2) and EVAP purge valve (1) ends.
  29. Connect the EVAP purge valve to fuel tank hose (2) to the EVAP purge valve (1).
    30. Fig 13: Fuel Rail Tube & Feed Pipe (Left Side)
    GM1954084Courtesy of GENERAL MOTORS COMPANY
  30. Remove the plug on the fuel feed pipe (2) and fuel rail tube (1) end.
  31. Connect the fuel rail feed pipe (2) quick connect fitting. Refer to Metal Collar Quick Connect Fitting Service , or Plastic Collar Quick Connect Fitting Service .
    32. Fig 14: Heater Hoses & Intake Manifold
    GM3248484Courtesy of GENERAL MOTORS COMPANY
  32. Position the heater hoses (1) correctly on the intake manifold (2).
  33. Install the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .
  34. Fill the cooling system. Refer to Cooling System Draining and Filling .
  35. Connect the battery ground cable. Refer to Battery Negative Cable Disconnection and Connection .
  36. Run engine and check for leaks.
  37. Install the engine cover. Refer to Engine Cover Replacement .
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