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 To 110° To 130°C (230° To 266°F)

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2. Remove the valve guide using suitable tool.
   WARNING: Cylinder head contains heat. When working, wear protective equipment to avoid getting burned.
   Fig 2: Removing Valve Guide Using Tool

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3. Ream the cylinder head valve guide hole using suitable tool.

   Valve guide hole diameter: 

   Standard 

   Intake and exhaust: 9.975 - 9.996 mm (0.3927 - 0.3935 in) 

   Oversize (service) 

   Intake and exhaust: 10.175 - 10.196 mm (0.4006 - 0.4014 in) 

   Fig 3: Reaming Cylinder Head Valve Guide Hole Using Tool

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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 To 110° To 130°C (230° To 266°F)

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5. Press the valve guide from the camshaft side to the dimensions as shown below.
   WARNING: Cylinder head contains heat. When working, wear protective equipment to avoid getting burned.
   Fig 5: Identifying Valve Guide Dimensions From Camshaft Side

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6. Ream the cylinder head valve guide using suitable tool.

   Valve guide inside diameter: 

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

   Fig 6: Reaming Cylinder Head Valve Guide Hole Using Tool

   Courtesy of NISSAN NORTH AMERICA, INC.