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Home >> Nissan-Datsun >> 2008 >> Sentra SL >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Mechanical (Qr25DE)) >> Cylinder Head >> Disassembly and Assembly >> Assembly

Disassembly and Assembly: Assembly

WARNING: This page is about a different variant/trim than selected.
  1. Install valve guide. Refer to "VALVE GUIDE REPLACEMENT ".
  2. Install valve seat. Refer to "VALVE SEAT REPLACEMENT ".
  3. Install new valve oil seal to the specified height as shown, using Tool.

    Oil seal installed height : 12.1 mm (0.476 in) 

    Tool number : KV10115600 (J-38958) 

    Fig 1: Pressing Valve Oil Seal
    G04924848Courtesy of NISSAN MOTOR CO., U.S.A.
  4. Install valve.
    • Install larger diameter to intake side.
  5. Install valve spring (with valve spring seat).
    • Install smaller pitch spring end (valve spring seat side) to cylinder head side.
    • Confirm the identification color of the valve spring.

      Intake spring identification color : Pink 

      Exhaust spring identification color : Blue 

      Fig 2: Identifying Identification Color Of Valve Spring
      G04924868Courtesy of NISSAN MOTOR CO., U.S.A.
  6. Install valve spring retainer.
  7. Install valve collet using Tool.

    Tool numbers : KV10116200 (J-26336-B) 

    : KV10115900 (J-26336-20) 

    • Install valve collet with a magnet hand.
      CAUTION: When working, be careful not to damage valve lifter holes.
    • Tap valve stem edge lightly with a plastic hammer after installation to check its installed condition.
      Fig 3: Compressing Valve Spring Using Tool Attachment
      G04899762Courtesy of NISSAN MOTOR CO., U.S.A.
  8. Install valve lifter.
  9. Install the spark plug tube, if removed. Press-fit the spark plug tube into the cylinder head using the following procedure:
    1. Remove old sealant from cylinder head side installation hole.
    2. Apply sealant all round on spark plug tube within approximately 12 mm (0.47 in) width from edge of spark plug tube on the press-fit side.

      Use Genuine High Strength Locking Sealant or equivalent.  Refer to "RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS "

    3. Press-fit the spark plug tube to specified height "H" as shown, using suitable tool.

      Standard press-fit height "H" : 41.2 - 42.2 mm (1.622 - 1.661 in) 

      Fig 4: Identifying High Strength Locking Sealant Application Area
      G04885810Courtesy of NISSAN MOTOR CO., U.S.A.
      CAUTION:
      • When press-fitting, be careful not to deform spark plug tube.
      • After press-fitting, wipe off any protruding sealant on top surface of cylinder head.
  10. Install spark plug. Refer to "SPARK PLUG ".
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