Valve Guide Replacement

When valve guide is removed, replace with oversized [0.2 mm (0.008 in)] valve guide.

1. To remove valve guide, heat cylinder head to 110° to 130°C (230° to 266°F) by soaking in heated oil.
   Fig 1: Heating Cylinder Head

   Courtesy 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 Imp ton) pressure] or hammer and valve guide drift (commercial service tool).
   CAUTION: Cylinder head contains heat. When working, wear protective equipment to avoid getting burned.
   Fig 2: Driving Out Valve Guide

   Courtesy of NISSAN MOTOR CO., U.S.A.
3. Ream cylinder head valve guide hole; using suitable reamer.

   Valve guide hole diameter (for service parts): 

   Intake and exhaust 

   : 10.175 - 10.196 mm (0.4006 - 0.4014 in) 

   Fig 3: Reaming Cylinder Head Valve Guide Hole

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

   Courtesy of NISSAN MOTOR CO., U.S.A.
5. Press valve guide from camshaft side to the dimensions as shown below using suitable tool.

   Projection "L" 

   Intake and exhaust 

   : 12.6 - 12.8 mm (0.496 - 0.504 in) 

   CAUTION: Cylinder head contains heat. When working, wear protective equipment to avoid getting burned.
   Fig 5: Identifying Dimensions For Pressing Valve Guide From Camshaft Side

   Courtesy of NISSAN MOTOR CO., U.S.A.
6. Apply reamer finish to valve guide using suitable reamer.

   Standard: 

   Intake and exhaust 

   : 6.000 - 6.018 mm (0.2362 - 0.2369 in) 

   Fig 6: Applying Reamer Finish To Valve Guide

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