Cylinder Head Assembly: Testing and Inspection

INSPECTION
Inspect cylinder head deck, common chamber and exhaust manifold mating surfaces for flatness. These surfaces may be reconditioned by milling. If the surfaces are "out of flat" by more than specification, the surface should be ground to within specifications. Replace the head if it requires machining beyond the repairable limit.

Head surface and manifold surface:
Standard: 0.05 mm (0.002 inch) or less
Warpage limit: 0.2 mm (0.0079 inch)
Maximum Repairable limit: 0.2 mm (0.0079 inch)
Head height:
Standard height: 133.2 mm (5.2441 inch)
Warpage limit: 0.2 mm (0.0079 inch)
Maximum Repairable limit: 133.0 mm (5.2362 inch)