CYLINDER HEAD INSPECTION/REPAIR [WL-C, WE-C]

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1. Inspect the cylinder head surface for cracks. Replace the cylinder head if necessary.

2. Inspect for the following and repair or replace.

(1) Sunken valve seats

(2) Excessive camshaft oil clearance and end play

3. Measure the cylinder head for distortion in the seven directions as shown in the figure.

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Maximum cylinder head distortion

X distortion: 0.02 mm {0.0008 in} max.

Y distortion: 0.05 mm {0.0020 in} max.

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

5. Measure the manifold contact surface distortion as shown in the figure.

Maximum manifold contact surface distortion

0.05 mm {0.002 in} max.

6. If the distortion exceeds the maximum, grind the surface or replace the cylinder head.

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Maximum manifold contact surface grinding

0.15 mm {0.0059 in} max.