Surface Variation

Cylinder Head Bore 31.000 - 31.025 mm (1.2205 - 1.2214 inch)
Cylinder Head Gasket Surface Distortion (Max) 0.05 mm (0.002 inch)
Cylinder Head to Manifold Seating Distortion (Max) 0.010 mm (0.004 inch)
Cylinder Bore Diameter Limit 74.15 mm (2.9193 inch)
Taper and Out-of-Round Limit 0.10 mm (0.004 inch)