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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 1040 (Engine Mechanical - QG18DE) >> Cylinder Head >> Inspection after Disassembly >> Valve Guide Replacement

Valve Guide Replacement

WARNING: This page is about a different car, the 2004 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.
  1. To remove valve guide, heat cylinder head to 110° to 130°C (230° to 266°F).
    Fig 1: Heating Cylinder Head
    G00774056Courtesy of NISSAN MOTOR CO., U.S.A.
  2. Drive out valve guide with a press [under a 20 kN (2 ton, 2.2 US ton, 2.0 lmp ton) pressure] or hammer and suitable tool.
    Fig 2: Removing Valve Guide
    G00774057Courtesy of NISSAN MOTOR CO., U.S.A.
  3. Ream cylinder head valve guide hole.
    1. Valve guide hole diameter (for service parts) 
      1. Intake & Exhaust : 9.685 - 9.696 mm (0.3813 - 0.3817 in) 
    Fig 3: Reaming Cylinder Head Valve Guide Hole
    G00774058Courtesy of NISSAN MOTOR CO., U.S.A.
  4. Heat cylinder head to 110° to 130°C (230° to 266°F) and press service valve guide into cylinder head at specified height.
    1. Projection "L" : 11.5 - 11.7 mm (0.453 - 0.461 in) 
    Fig 4: Valve Guide Projection
    G00774059Courtesy of NISSAN MOTOR CO., U.S.A.
  5. Ream the new valve guide to the specified inner diameter.
    1. Inner diameter finished size 
    2. Intake & Exhaust : 5.500 - 5.515 mm (0.2165 - 0.2171 in) 
    Fig 5: Reaming New Valve Guide
    G00774060Courtesy of NISSAN MOTOR CO., U.S.A.
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