What is the torque specification for cylinder head bolts?

[DiGia]

Cylinder head bolts require 8-9 kg of torque. Below is relevant information about cylinders: 1. Single-acting cylinder: Only one end has a piston rod. Air pressure is supplied to one side of the piston to generate force, which pushes the piston to extend. It returns via spring or self-weight. 2. Double-acting cylinder: Alternating air supply to both sides of the piston provides output force in one or two directions. 3. Diaphragm-type cylinder: Uses a diaphragm instead of a piston, providing output force in only one direction with spring return. It has excellent sealing but short stroke. 4. Impact cylinder: A new component type that converts compressed gas pressure energy into high-speed piston kinetic energy (10-20 m/s) to perform work. Impact cylinders feature an intermediate cover with nozzle and drain ports.