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Home >> Nissan-Datsun >> 2011 >> Sentra SE-R >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Mechanical >> Engine Mechanical (Qr25DE) >> Service Information >> Cylinder Head >> Inspection After Disassembly >> Cylinder Head Distortion

Cylinder Head Distortion

  1. Wipe off oil and remove water scale deposits, old gasket, old sealer, and carbon with a scraper.
    CAUTION: Use care not to allow gasket debris to enter passages for oil or water.
  2. At each of several locations on bottom surface of cylinder head, measure distortion in six directions. Replace the cylinder head if the disaortion exceeds the limit specification.

    Limit : 0.1 mm (0.004 in) or less 

    Fig 1: Measuring Cylinder Head Distortion
    G07137543Courtesy of NISSAN MOTOR CO., U.S.A.
    • If it exceeds the limit, replace cylinder head.
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