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Home >> Mercury >> 2009 >> Mariner Base, 2.5 7, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 79 (Engine Mechanical - 5.4L (4V)) >> Disassembly And Assembly Of Subassemblies >> Cylinder Head >> Disassembly

Cylinder Head: Disassembly

WARNING: This page is about a different car, the 2009 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE: Before disassembly begins, mark the valve position on the face of each valve being removed. The valves must be reinstalled into their original positions or damage to the engine may occur.
  1. Install the Camshaft Holding Tool.
  2. Fig 1: Identifying Special Tool (303-446)
    GF0000419Courtesy of FORD MOTOR CO.
    NOTE: RH shown, LH similar.
  3. Remove the bolt, washer and camshaft drive sprocket.
  4. Fig 2: Identifying Camshaft Sprocket, Washer & Bolt
    GF0000596Courtesy of FORD MOTOR CO.
    NOTE: RH shown, LH similar.
  5. Remove the bolt, washer and spacer.
  6. Fig 3: Identifying Bolt, Washer & Spacer
    GF0000597Courtesy of FORD MOTOR CO.
  7. Compress the secondary timing chain tensioner and install a lock pin.
  8. Fig 4: Identifying Secondary Timing Chain Tensioner & Lock pin
    GF0000427Courtesy of FORD MOTOR CO.
    NOTE: LH shown, RH similar.
  9. Remove the timing chain and the 2 camshaft sprockets.
  10. Fig 5: Identifying Timing Chain & Camshaft Sprockets
    GF0000598Courtesy of FORD MOTOR CO.
    NOTE: LH shown, RH similar.
  11. Remove the 2 bolts and the secondary timing chain tensioner.
  12. Fig 6: Locating Secondary Timing Chain Tensioner Bolts
    GF0000599Courtesy of FORD MOTOR CO.
  13. Using the Valve Spring Compressor, compress the valve spring and remove the retainer keys.
  14. Fig 7: Compressing Valve Spring & Removing Valve Spring Retainer Keys Using Special Tool (303-452)
    GF0000437Courtesy of FORD MOTOR CO.
  15. Remove the valve, spring retainer, valve spring and the valve seal.
    • Discard the valve seal.
    • Remove the valve.
  16. Fig 8: Locating Valve, Spring Retainer, Valve Spring & Valve Seal
    GF0000600Courtesy of FORD MOTOR CO.
  17. Repeat the previous 2 steps and remove all of the retainer keys, spring retainers, valve springs, valve seals and valves.
  18. NOTE: The camshaft bearing cap bolts vary in length and head design and must be installed in their original positions. Camshaft bearing caps are not interchangeable and must be installed in their original positions or damage to the engine may occur.
    NOTE: The camshaft bearing cap with 3 bolts is located at the front of the LH cylinder head and at the rear of the RH cylinder head.
  19. Remove the camshaft bearing cap bolts in the sequence shown.
    • Remove the camshaft bearing caps.
    • Remove the camshafts.
  20. Fig 9: Removing Camshaft Bearing Cap Bolts In Sequence
    GF0000428Courtesy of FORD MOTOR CO.