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 In Oil

   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

   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 In Oil

   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: Checking Valve Guide Installed Height

   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: Reaming Cylinder Head Valve Guide

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