Valve Guide Replacement

When the valve guide is removed, replace it with an oversized (0.2 mm, 0.008 in) valve guide.

1. To remove the valve guide, heat the cylinder head to 110° to 130°C (230° to 266°F) by soaking it in heated oil.
   Fig 1: Heating Cylinder Head By Soaking It In Heated Oil

   Courtesy of NISSAN MOTOR CO., U.S.A.
2. Remove the valve guide using suitable tool.
   CAUTION: Cylinder head contains heat. When working, wear protective equipment to avoid getting burned.
   Fig 2: Removing Valve Guide Using Suitable Tool

   Courtesy of NISSAN MOTOR CO., U.S.A.
3. Ream the cylinder head valve guide hole using suitable tool.
   1. Valve guide hole diameter: 
   2. Standard 
      1. Intake and exhaust: 9.975 - 9.996 mm (0.3927 - 0.3935 in) 
   3. Oversize (service) 
      1. Intake and exhaust: 10.175 - 10.196 mm (0.4006 - 0.4014 in) 
   Fig 3: Reaming Cylinder Head Valve Guide Hole Using Suitable Tool

   Courtesy of NISSAN MOTOR CO., U.S.A.
4. Heat the cylinder head to 110° to 130°C (230° to 266°F) by soaking it in heated oil.
   Fig 4: Heating Cylinder Head By Soaking It In Hot Oil

   Courtesy of NISSAN MOTOR CO., U.S.A.
5. Press the valve guide from the camshaft side to the dimensions as shown.
   CAUTION: Cylinder head contains heat. When working, wear protective equipment to avoid getting burned.
   Fig 5: Pressing Valve Guide From Camshaft Side To Specified Dimensions

   Courtesy of NISSAN MOTOR CO., U.S.A.
6. Ream the cylinder head valve guide hole using suitable tool.
   1. Valve guide hole diameter: 
      1. Intake and exhaust: 6.000 - 6.018 mm (0.2362 - 0.2369 in) 
   Fig 6: Reaming Cylinder Head Valve Guide Hole Using Suitable Tool

   Courtesy of NISSAN MOTOR CO., U.S.A.