Head Bolt Reuse/Replace

Outer Diameter of Cylinder Head Bolts





^ Cylinder head bolts are tightened by plastic zone tightening method. Whenever the size difference between d1 and d2 exceeds the limit, replace them with new one.
Limit (d1 - d2) More than 0.18 mm (0.0071 inch)
^ If reduction of outer diameter appears in a position other than d2, use it as d2 point.