Valve Guide Replacement

WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

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 deg. C (230 - 266 deg. F) by soaking in heated oil.

Courtesy of NISSAN NORTH AMERICA, INC.

WARNING: Cylinder head contains heat. When working, wear protective equipment to avoid getting burned.
Drive out the valve guide with a press [under a 20 kN (2.2 US ton) pressure] or hammer and suitable tool.

Courtesy of NISSAN NORTH AMERICA, INC.

Ream cylinder head valve guide hole.

Courtesy of NISSAN NORTH AMERICA, INC.

Valve guide hole diameter (for service parts), intake and exhaust

: 10.175 - 10.196 mm (0.4006 - 0.4014 in)

Heat cylinder head to 110 - 130 deg. C (230 - 266 deg. F) by soaking in heated oil and press new valve guide from camshaft side into the cylinder head to the dimensions as shown, below.

Courtesy of NISSAN NORTH AMERICA, INC.

Projection (L)

: 12.6 - 12.8 mm (0.496 - 0.504 in)

WARNING: Cylinder head contains heat. When working, wear protective equipment to avoid getting burned.

Using a valve guide reamer, apply a reamer finish to the valve guide.

Courtesy of NISSAN NORTH AMERICA, INC.

Intake and exhaust finished size

(0.2362 - 0.2369 in)