Checking the cylinder head of the gas distribution mechanism (Mazda CX-5KE)

1. Check the cylinder head surfaces for cracks and other defects using a fluorescent liquid and an ultraviolet lamp. If defects are found, replace the cylinder head with a new one.

2. Check the deformation of the contact surface on the combustion chamber side in six directions as shown in the figure using a measuring ruler and a set of flat feeler gauges. If the deformation exceeds 0.05 mm, replace the cylinder head with a new one. Do not attempt to repair the cylinder head by milling or grinding.



3. Check the contact surfaces of the exhaust and intake manifolds for deformation using a straightedge and a set of flat feeler gauges, as shown in the figure.



If the deformation on the intake manifold side exceeds the maximum permissible value, replace the cylinder head with a new one.


If the deformation on the exhaust manifold side exceeds the maximum permissible value, mill the surface or replace the cylinder head.

Note:

Maximum permissible deformation of the contact surface:

• Intake manifold: 0.10 mm.
• Exhaust manifold: 0.05 mm.

Permissible value of deformation of the contact surface for processing (exhaust manifold): 0.20 mm.