Cylinder Head Bolt Reusability

Cylinder Head Bolts Diameter





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