Cylinder Head Flatness Measurement Procedure

1. Clean any remaining head gasket material from the cylinder head face using the J28410.
2. Place a straight-edge diagonally across the cylinder head face surface.
3. Measure the clearance between the straight-edge and the cylinder head using a feeler gage at four points along the straight-edge.
^ If warpage is less than 0.05 mm (0.002 in.), the cylinder head surface does not require resurfacing.
^ If the warpage is between 0.05 mm and 0.2 mm (0.002 in. and 0.008 in.), you must resurface the head.





4. If resurfacing is required, the dimension between the combustion chamber gauge pad and the deck surface (1) must be at least 10.5 mm (0.413 in.).