Cylinder Head Distortion
CYLINDER HEAD DISTORTIONRemove any oil, scale, gasket, sealant and carbon deposits from the cylinder head surface.
CAUTION: Do not allow any debris to enter the oil or coolant passages.
Measure the bottom surface of the cylinder head for distortion in six directions as shown, using suitable tools.
Standard 0.03 mm (0.0012 inch)
Limit 0.1 mm (0.004 inch)
^ If measurement exceeds the limit, replace the cylinder head.