Engine Cylinder Head Bolts Compatible with Hyundai Kia D4CB 2.5L 22321-4A000

For the modern D4CB diesel engine (2.5L CRDi), the cylinder head bolts are of torque yield type (TTY) design and need to be replaced. The tightening procedure consists of four steps: first tighten to 25 Nm, then tighten to 49 Nm, then rotate 120°, and finally rotate 90°. Always use new bolts to ensure the correct clamping force.