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 (2.2 ton-force) pressure] or hammer and suitable tool.
   Fig 2: Driving Out Valve Guide With Press

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

   Intake and exhaust valve guide hole diameter (Standard) : 9.975 - 9.996 mm (0.3927 - 0.3935 in) 

4. Heat cylinder head to 110° to 130°C (230° to 266°F) by soaking in heated oil.
   Fig 3: Reaming Valve Guide

   Courtesy of NISSAN MOTOR CO., U.S.A.
5. Press valve guide from camshaft side to dimensions as shown in the figure.
   Fig 4: Measuring Proper Valve Guide Installation Height

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

   Intake and exhaust : 6.000 - 6.018 mm (0.2362 - 0.2369 in) 

   Fig 5: Applying Finish To Valve Guide Using Suitable Reamer

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