LEMON Manuals: Even more car manuals for everyone
Home >> Audi >> 2016 >> S5 Prestige, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 1072 (Engine - 3.5L ECOBOOST (272KW/370PS)) >> Disassembly And Assembly Of Subassemblies >> Cylinder Head >> Disassembly

Cylinder Head: Disassembly

WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: During engine repair procedures, cleanliness is extremely important. Any foreign material, including any material created while cleaning gasket surfaces, that enters the oil passages, coolant passages or the oil pan, can cause engine failure.

LH cylinder head 

  1. Remove Special Service Tool: 303-1654 Lift Eyes.
    GFD272736Courtesy of FORD MOTOR COMPANY
    • Remove the nuts and the exhaust manifold.

    • Discard the nuts.

    GFD272737Courtesy of FORD MOTOR COMPANY
    • Remove the discard the exhaust manifold gasket.

    • Remove and discard the studs.

    GFD272738Courtesy of FORD MOTOR COMPANY

    • NOTE: Do not use metal scrapers, wire brushes, power abrasive discs or other abrasive means to clean the sealing surfaces. These may cause scratches and gouges resulting in leak paths. Use a plastic scraper to clean the sealing surfaces.

      Clean the exhaust manifold mating surface of the cylinder head with metal surface prep wipes. Follow the directions on the packaging.

      Material: Motorcraft® Metal Surface Prep Wipes / ZC-31-B

    1. Remove and discard the port injection fuel rail mounting bolts.
    2. NOTE: Pull out the fuel rails in the direction of the fuel injector axis or damage may occur to the fuel injectors.

      Remove the port injection fuel rail and the fuel injectors.

    GFD272739Courtesy of FORD MOTOR COMPANY
  6. Disconnect the fuel injector electrical connectors.
    GFD272740Courtesy of FORD MOTOR COMPANY
    • Release the fuel injector retaining clips.

    • Remove the fuel injectors from the fuel rail.

    GFD272741Courtesy of FORD MOTOR COMPANY
  8. Remove and discard the clips from all of the fuel injectors including any injectors that have remained in the cylinder head.
    GFD272742Courtesy of FORD MOTOR COMPANY
  9. Remove and discard all of the fuel injector O-ring seals.
    GFD272743Courtesy of FORD MOTOR COMPANY
    1. Remove and discard the direct injection fuel rail mounting bolts.
    2. NOTE: Pull out the fuel rails in the direction of the fuel injector axis or damage may occur to the fuel injectors.
      NOTE: When removing the fuel rails, the fuel injectors may remain in the cylinder heads and require the use of a Fuel Injector Remover tool to extract. Wiggling the injector by hand to break it loose may allow the injector to be removed by hand.

      Remove the direct injection fuel rail and the fuel injectors.

    GFD272744Courtesy of FORD MOTOR COMPANY
  11. Disconnect the fuel injector electrical connectors.
    GFD272745Courtesy of FORD MOTOR COMPANY
    • Release the fuel injector retaining clips.

    • Remove the fuel injectors from the fuel rail.

    GFD272746Courtesy of FORD MOTOR COMPANY
  13. Remove and discard the clips from all of the fuel injectors including any injectors that have remained in the cylinder head.
    GFD272747Courtesy of FORD MOTOR COMPANY
    • Remove and discard the fuel injector O-ring seals.

    • NOTE: Note the correct orientation of the fuel injector support rings for correct installation of the new fuel injector support rings.

      Remove and discard the fuel injector support rings.

    GFD272748Courtesy of FORD MOTOR COMPANY
  15. NOTE: Use care when removing the lower Teflon® seals, not to scratch, nick or gouge the fuel injectors.
    NOTE: Do not attempt to cut the lower Teflon® seal without first pulling it away from the fuel injector or damage to the injector may occur.

    • Pull the lower Teflon® seal away from the injector.

    • Carefully cut and discard the lower fuel injector Teflon® seals.

    GFD272749Courtesy of FORD MOTOR COMPANY

    RH cylinder head 

  16. Remove Special Service Tool: 303-1654 Lift Eyes.
    GFD272750Courtesy of FORD MOTOR COMPANY
  17. Remove and discard the CHT sensor.
    GFD272751Courtesy of FORD MOTOR COMPANY
    • Remove the nuts and the exhaust manifold.

    • Discard the nuts.

    GFD272752Courtesy of FORD MOTOR COMPANY
  19. Remove and discard the studs and the exhaust manifold gasket.
    GFD272753Courtesy of FORD MOTOR COMPANY

    • NOTE: Do not use metal scrapers, wire brushes, power abrasive discs or other abrasive means to clean the sealing surfaces. These may cause scratches and gouges resulting in leak paths. Use a plastic scraper to clean the sealing surfaces.

      Clean the exhaust manifold mating surface of the cylinder head with metal surface prep wipes. Follow the directions on the packaging.

      Material: Motorcraft® Metal Surface Prep Wipes / ZC-31-B

    1. Remove and discard the port injection fuel rail mounting bolts.
    2. NOTE: Pull out the fuel rails in the direction of the fuel injector axis or damage may occur to the fuel injectors.

      Remove the port injection fuel rail and the fuel injectors.

    GFD272754Courtesy of FORD MOTOR COMPANY
  22. Disconnect the fuel injector electrical connectors.
    GFD272755Courtesy of FORD MOTOR COMPANY
    • Release the fuel injector retaining clips.

    • Remove the fuel injectors from the fuel rail.

    GFD272756Courtesy of FORD MOTOR COMPANY
  24. Remove and discard the clips from all of the fuel injectors including any injectors that have remained in the cylinder head.
    GFD272742Courtesy of FORD MOTOR COMPANY
  25. Remove and discard all of the fuel injector O-ring seals.
    GFD272743Courtesy of FORD MOTOR COMPANY
    1. Remove and discard the direct injection fuel rail mounting bolts.
    2. NOTE: Pull out the fuel rails in the direction of the fuel injector axis or damage may occur to the fuel injectors.
      NOTE: When removing the fuel rails, the fuel injectors may remain in the cylinder heads and require the use of a Fuel Injector Remover tool to extract. Wiggling the injector by hand to break it loose may allow the injector to be removed by hand.

      Remove the direct injection fuel rail and the fuel injectors.

    GFD272757Courtesy of FORD MOTOR COMPANY
  27. Disconnect the fuel injector electrical connectors.
    GFD272758Courtesy of FORD MOTOR COMPANY
    • Release the fuel injector retaining clips.

    • Remove the fuel injectors from the fuel rail.

    GFD272759Courtesy of FORD MOTOR COMPANY
  29. Remove and discard the clips from all of the fuel injectors including any injectors that have remained in the cylinder head.
    GFD272747Courtesy of FORD MOTOR COMPANY
    • Remove and discard the fuel injector O-ring seals.

    • NOTE: Note the correct orientation of the fuel injector support rings for correct installation of the new fuel injector support rings.

      Remove and discard the fuel injector support rings.

    GFD272748Courtesy of FORD MOTOR COMPANY
  31. NOTE: Use care when removing the lower Teflon® seals, not to scratch, nick or gouge the fuel injectors.
    NOTE: Do not attempt to cut the lower Teflon® seal without first pulling it away from the fuel injector or damage to the injector may occur.

    • Pull the lower Teflon® seal away from the injector.

    • Carefully cut and discard the lower fuel injector Teflon® seals.

    GFD272749Courtesy of FORD MOTOR COMPANY

    All cylinder heads 

  32. NOTE: Use minimal force to remove the fuel injectors that remained in the cylinder head with the Fuel Injector Remover tool or damage to the fuel injector assembly may occur.

    Using the special tools, remove the fuel injectors that remained in the cylinder head.Use Special Service Tool: 307-005 (T59L-100-B) Slide Hammer., 310-206 Remover, Fuel Injector.

    GFD272760Courtesy of FORD MOTOR COMPANY
  33. NOTE: Make sure to thoroughly clean any residual fuel or foreign material from the cylinder head, block and the general surrounding area of the fuel rails and injectors.
    NOTE: Do not use compressed air to clean the tip of the fuel injector.
    NOTE: Do not use a brush to clean the tip of the fuel injector.

    Using the special tool, clean the cylinder head fuel injector bores.Use Special Service Tool: 310-205 Fuel Injector Brush.

    GFD272761Courtesy of FORD MOTOR COMPANY
  34. Remove the spark plugs.
    GFD272762Courtesy of FORD MOTOR COMPANY
  35. NOTE: LH shown, RH similar.
    NOTE: If the components are to be reinstalled, they must be installed in the same positions. Mark the components for installation into their original locations.

    Using the special tools, remove the valve collet, valve spring retainer and the valve spring.Use Special Service Tool: 303-300 (T87C-6565-A) Set, Valve Spring Compressor., 303-350 (T89P-6565-A) Compressor, Valve Spring., 303-1249 Valve Spring Compressor., 303-1418 Compressor, Valve Spring.

    GFD272763Courtesy of FORD MOTOR COMPANY
  36. Remove and discard the valve stem seal.
    GFD272764Courtesy of FORD MOTOR COMPANY
  37. Remove the valve.
    GFD272765Courtesy of FORD MOTOR COMPANY
  38. Repeat the previous 3 steps for each valve.
scientia non olet · About LEMON Manuals