Cylinder Head Distortion
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.
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, below.
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Head surface distortion |
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Limit |
: 0.1 mm (0.004 in) |
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Standard |
: Less than 0.03 mm (0.0012 in) |
If it exceeds the limit, replace the cylinder head.
The limit for cylinder head resurfacing is determined by the cylinder block resurfacing.
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Resurfacing Limit |
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Amount of cylinder head resurfacing is (A). |
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Amount of cylinder block resurfacing is (B). |
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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.
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Nominal cylinder head height |
: 126.3 - 126.5 mm (4.972 - 4.980 in) |