Valve Guide Replacement

WARNING: This page is about a different car, the 2006 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

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

To remove valve guide, heat cylinder head to 110° - 130°C (230° - 266°F) by soaking in heated oil.
WARNING: Cylinder head is hot. Wear protective equipment to prevent getting burned.

Fig 1: Heating Cylinder Head In Oil
Courtesy of NISSAN MOTOR CO., U.S.A.
Drive out the valve guide with a press [under a 20 kn (2.2 US ton) pressure] or hammer and suitable tool.

Fig 2: Identifying Drive Out Valve Guide With Tool
Courtesy of NISSAN MOTOR CO., U.S.A.
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.
Heat cylinder head to 110° - 130°C (230° - 266°F) by soaking in heated oil and press new valve guide from camshaft side into the cylinder head to the dimensions as shown.
WARNING: Cylinder head is hot. Wear protective equipment to prevent getting burned.

Projection "L" : 12.6 - 12.8 mm (0.496 - 0.504 in)

Fig 4: Checking Valve Guide Installed Height
Courtesy of NISSAN MOTOR CO., U.S.A.
Apply a reamer finish to the valve guide, using suitable reamer.
Intake and exhaust finished size : 6.000 - 6.018 mm (0.2362 - 0.2369 in)

Fig 5: Reaming Cylinder Head Valve Guide
Courtesy of NISSAN MOTOR CO., U.S.A.