Cylinder Head Distortion

WARNING: This page is about a different car, the 2007 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

Clean the surface of the cylinder head. Use a reliable straightedge and feeler gauge to check the flatness of cylinder head surface.

Check along six positions as shown.

Head surface distortion

Limit: 0.1 mm (0.004 in)

Standard: Less than 0.03 mm (0.0012 in)

If beyond the specified limit, resurface or replace it.

The limit for cylinder head resurfacing is determined by the cylinder block resurfacing .

Resurfacing Limit

Amount of cylinder head resurfacing is "A ."

Amount of cylinder block resurfacing is "B ."

The maximum limit: A + B = 0.2 mm (0.008 in)

After resurfacing cylinder head, check that camshaft rotates freely by hand. If resistance is felt, cylinder head must be replaced.

Nominal cylinder head height: 126.3 - 126.5 mm (4.972 - 4.980 in)

Fig 1: Measuring Cylinder Head Distortion

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