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Home >> Ford >> 2003 >> Mustang Mach 1, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Engine-Cobra 4.6L 4V) >> Disassembly And Assembly Of Subassemblies >> Cylinder Head >> Disassembly

Cylinder Head: Disassembly

WARNING: This page is about a different variant/trim than selected.
    CAUTION: Do not place the cylinder head (6049) flat on the bench; the valves will bend.
    CAUTION: Before disassembly begins, mark the valve position on the face of each valve being removed. The valves must be re-installed into the same positions.
    Fig 1: Installing Special Tool
    G01625013Courtesy of FORD MOTOR CO.
  1. Install the special tool.
  2. Remove the exhaust camshaft sprocket and the intake camshaft bolt, washer and spacer.
    Fig 2: Removing Exhaust Camshaft Sprocket And Intake Camshaft Bolt, Washer And Spacer
    G01625014Courtesy of FORD MOTOR CO.
  3. Compress the tensioner (6L266) and install a lock pin.
    Fig 3: Installing Lock Pin
    G01625015Courtesy of FORD MOTOR CO.
  4. Remove the special tool.
    Fig 4: Removing Special Tool
    G01625016Courtesy of FORD MOTOR CO.
  5. Remove the timing chain (6268) and the camshaft sprocket (6256).
    Fig 5: Removing Timing Chain And Camshaft Sprocket
    G01625017Courtesy of FORD MOTOR CO.
    6. NOTE: LH tensioner is shown, RH tensioner is similar
    Fig 6: Removing Tensioner
    G01625018Courtesy of FORD MOTOR CO.
  6. Remove the tensioner.
  7. Remove the roller followers on the base circle.
    1. Install the special tool on the valve spring.
    2. Compress the tool and remove the roller follower.
      Fig 7: Removing Roller Followers On Base Circle
      G01625019Courtesy of FORD MOTOR CO.
  8. Repeat the previous step for the remaining roller followers.
  9. Remove the hydraulic lash adjusters.
    Fig 8: Removing Hydraulic Lash Adjusters
    G01625020Courtesy of FORD MOTOR CO.
    10. CAUTION: Make sure the tool is seated correctly on the valve spring. Apply a small amount of air at a time. This will prevent the tool from shifting and causing damage to the cylinder head.
    Fig 9: Installing Air-Operated Spring Compressor On Cylinder Head
    G01625021Courtesy of FORD MOTOR CO.
  10. Install the air-operated spring compressor on the cylinder head.
  11. Compress the valve spring compressor and remove the key from the valves.
    Fig 10: Removing Key From Valves
    G01625022Courtesy of FORD MOTOR CO.
  12. Remove the intake valves and the valve springs.
    1. Release the pressure and remove the valve spring compressor.
    2. Remove the intake valves and the valve springs from the cylinder head.
      Fig 11: Removing Intake Valves And Valve Springs From Cylinder Head
      G01625023Courtesy of FORD MOTOR CO.
  13. Remove the valve stem seals.
    Fig 12: Removing Valve Stem Seals
    G01625024Courtesy of FORD MOTOR CO.
    14. CAUTION: The outer bolts on the outer cam bearing cap (exhaust) are longer and must be returned to the same location or engine damage may occur.
    NOTE: Identify the camshaft-to-cylinder head location. Caps are not interchangeable.
    Fig 13: Removing Bolts And Camshaft Bearing Cap Assemblies
    G01625025Courtesy of FORD MOTOR CO.
  14. Remove the bolts and the camshaft bearing cap assemblies.
  15. Remove the camshafts (6250).
    Fig 14: Removing Camshafts
    G01625026Courtesy of FORD MOTOR CO.
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