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CYLINDER HEAD INSPECTION [WITHOUT DIESEL PARTICULATE FILTER]

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1. Carry out color contrast penetrate examination on the cylinder head surface. Replace the cylinder head if necessary.

2. Inspect for the following and repair or replace if necessary.

  (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.

Maximum distortion

  X distortion: 0.01 mm {0.0004 in}
  Y distortion: 0.04 mm {0.0016 in}

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

5. Measure the manifold contact surface distortion as shown.

Maximum distortion

  0.06 mm {0.0024 in}

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

Maximum grinding

  0.20 mm {0.008 in}