Cylinder Head Assembly: Testing and Inspection

1. Inspect cylinder head for flatness. Using a precision straight edge SA9177NE (or equivalent) and feeler gauge SA 91101NE (or equivalent), measure the surfaces contacting the cylinder block and manifolds for warpage. If warpage is greater than maximum, replace the cylinder head.
2. Inspect cylinder head for cracks. Using a dye penetrant, check the combustion chamber intake and exhaust ports, head surface, and the top of the head for cracks. If cracked, replace the cylinder head.