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Home >> Lincoln >> 2005 >> Aviator AWD >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine >> Disassembly And Assembly Of Subassemblies >> Cylinder Head >> Disassembly
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Cylinder Head: Disassembly

  1. Install the special tool between the valve spring coils to protect the exhaust valve stem seal from damage.
    Fig 1: Installing Special Tool Between Valve Spring Coils To Protect Exhaust Valve Stem Seal
    G03862692Courtesy of FORD MOTOR CO.
  2. Using the special tool, compress the exhaust valve spring. Remove the exhaust valve spring retainer keys.
    Fig 2: Compressing Exhaust Valve Spring
    G03862693Courtesy of FORD MOTOR CO.
    3. NOTE: Valve stem seals should be visually inspected if new seals are not installed.
    Fig 3: Removing Valve Spring Retainer Valve Spring And Valve Stem Seal
    G03862694Courtesy of FORD MOTOR CO.
  3. Remove the valve spring retainer, the valve spring and the valve stem seal.
  4. Remove the valve from the cylinder head.
  5. Repeat the above 4 steps and remove all of the exhaust valve and spring assemblies.
  6. Install the special tool between the valve spring coils to protect the intake valve stem seal from damage.
    Fig 4: Installing Special Tool Between Valve Spring Coils To Protect Intake Valve Stem Seal
    G03862695Courtesy of FORD MOTOR CO.
  7. Using the special tool, compress the intake valve spring. Remove the intake valve spring retainer keys.
    Fig 5: Compressing Intake Valve Spring
    G03862696Courtesy of FORD MOTOR CO.
    8. NOTE: Valve stem seals should be visually inspected if new seals are not installed.
    Fig 6: Removing Valve Spring Retainer Valve Spring And Valve Stem Seal
    G03862697Courtesy of FORD MOTOR CO.
  8. Remove the valve spring retainer, the valve spring and the valve stem seal.
  9. Remove the valve from the cylinder head.
  10. Repeat the preceding 4 steps to remove all of the intake valve and spring assemblies.
  11. Remove the camshaft sprocket bolt and washer.
    Fig 7: Removing Camshaft Sprocket Bolt And Washer
    G03862698Courtesy of FORD MOTOR CO.
  12. Remove the 2 bolts and the tensioner.
  13. Remove the secondary camshaft spacer, washer and bolt.
  14. Remove the secondary camshaft sprockets and chain assembly.
    Fig 8: Removing Secondary Camshaft Sprockets And Chain Assembly
    G03862699Courtesy of FORD MOTOR CO.
  15. Remove the 12 outboard camshaft bearing cap bolts and bearing caps.
  16. Remove the 19 inboard camshaft bearing cap bolts and bearing caps.
  17. Remove the camshafts.
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