CYLINDER HEAD INSPECTION

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1. Inspect the cylinder head surface for cracks and other damage using a red dye penetrant.

• If there is a malfunction, replace the cylinder head.

2. Measure the combustion chamber side of the cylinder head for distortion in six directions as shown in the figure using a straight edge and feeler gauge.

• If the distortion exceeds the maximum specification, replace the cylinder head. Do not attempt to repair the cylinder head by milling or grinding.

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Maximum distortion, head gasket side of the cylinder head

0.05 mm {0.002 in}

3. Inspect the contact surface of the exhaust manifold and the intake manifold for distortion by measuring as shown in the figure using a straight edge and feeler gauge.

• If the distortion on intake manifold side exceeds the maximum specification, replace the cylinder head.

• If the distortion on exhaust manifold side exceeds the maximum specification, grind the surface or replace the cylinder head.

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Maximum distortion, manifold side

IN: 0.10 mm {0.0039 in}

EX: 0.05 mm {0.002 in}

Maximum cutting length, manifold side

IN: Cutting not authorized

EX: 0.20 mm {0.0079 in}