CATERPILLAR-3011C-3013C-CYLINDER-HEAD-BOLT

153-5578 is a cylinder head bolt for Caterpillar's 3011C and 3013C engines. Like most modern diesel head bolts, these are torque-to-yield fasteners, meaning they're designed to stretch slightly as they're tightened to final spec and shouldn't be reused once removed — reusing a stretched bolt risks incorrect clamping force on the head gasket, which is exactly the failure a new gasket is meant to prevent. Orange.net.za ships this part fast, South Africa-wide.