Cylinder Head: Inspection: Notes

1. Check the cylinder head for cracks, damage and coolant leakage. If cracked, replace the cylinder head.
2. Remove scale, sealing compound and carbon deposits completely. After cleaning the oil passages, apply compressed air to verify that the passages are not clogged.
   Fig 1: Cleaning Cylinder Head Surface

   Courtesy of HYUNDAI MOTOR CO.
3. Check the cylinder head surface for flatness in the direction as shown in the illustration. If flatness exceeds service limit in any direction, either replace the cylinder head or machine the cylinder head matching surface lightly.

Flatness of cylinder head gasket surface 

Standard : Less than 0.03 mm (0.0012 in.)

Limit : 0.2 mm (0.008 in.)