Inspection
Check intake manifold surface for warpage. Replace intake manifold if warpage exceeds .008" (.20 mm).
Check exhaust manifold for cracks and warpage. Replace exhaust manifold if warpage exceeds .011" (.28 mm).
Inspect cylinder head surface and manifold sealing areas (if manifolds are removed) for cracks and warpage. Replace cylinder head if warpage exceeds specification. Inspect cylinder block deck warpage. Replace cylinder block if warpage exceeds specification. See CYLINDER HEAD and CYLINDER BLOCK tables under ENGINE SPECIFICATIONS.