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Home >> Subaru >> 2023 >> Forester Base >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical System >> Cylinder Head >> Disassembly

Cylinder Head: Disassembly

  1. Remove the chain cover securing bolt from the cylinder head LH.
    G13224512Courtesy of SUBARU
  2. Remove the stud bolts from the cylinder head.
    NOTE: Perform this procedure only when required.
    G13224513Courtesy of SUBARU
  3. Remove the valve collet, valve, valve spring retainer, valve spring and valve spring seat from the cylinder head RH.
    WARNING: Metallic sodium is encapsulated in the exhaust valve. Metallic sodium is a strong alkaline material and thus prone to serious chemical reaction. When handling or disposing of the valve, be sure to confirm "DISPOSAL". Ref. to MECHANICAL (H4DO)>CYLINDER HEAD>DISPOSAL .
    CAUTION: During work, place a waste cloth, etc. to avoid scratching the mating surface of the cylinder head RH.
    NOTE:
    • Mark each part to prevent confusion.
    • Keep all the removed parts in order for re-installing in their original positions.
    1. Using valve spring compressor, compress the valve spring and remove the valve collet.
      G11253408Courtesy of SUBARU
    2. Remove valve, valve spring retainer, valve spring and valve spring seat.
  4. Remove the valve collet, valve, valve spring retainer, valve spring and valve spring seat from the cylinder head LH.
  5. Remove the valve oil seals from valve guides of cylinder head RH.
    CAUTION:
    • During work, place a waste cloth, etc. to avoid scratching the mating surface of the cylinder head RH.
    • Use special care not to damage the cylinder head RH and guide during work.
    NOTE: For removal of valve guide, refer to INSPECTION. Ref. to MECHANICAL (H4DO)>CYLINDER HEAD>INSPECTION>VALVE & VALVE GUIDE .
    G11253409Courtesy of SUBARU
  6. For cylinder head LH, remove the valve oil seal in the same manner.
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