How many kilograms should the cylinder head screws be tightened to?
2 Answers
Cylinder screws should be tightened to 8-9 kilograms. Below is relevant information about cylinders: 1. Single-acting cylinder: It has a piston rod on only one end. Compressed air is supplied to one side of the piston to generate pressure, which pushes the piston to extend and produce thrust. It returns via spring force or its own weight. 2. Double-acting cylinder: Compressed air is alternately supplied to both sides of the piston, generating output force in one or two directions. 3. Diaphragm cylinder: Uses a diaphragm instead of a piston, producing output force in only one direction and resetting via spring. It has good sealing performance but a short stroke. 4. Impact cylinder: This is a new type of component. It converts the pressure energy of compressed gas into the kinetic energy of high-speed piston movement (10-20 meters/second) to perform work. The impact cylinder features a middle cover with a nozzle and a drain port.
With years of experience in car repair, I remember that tightening cylinder head bolts is a meticulous job. Each car is different, especially across brands and engine types. For instance, regular family cars might require around 20 Newton meters, while turbocharged engines could go up to 35 Newton meters. I've tried it on my own car—you must strictly follow the manual: first lightly tighten all bolts, then gradually increase torque in sequence from the center outward. Over-tightening can stretch the bolts, causing cylinder head deformation and oil leaks; under-tightening leads to poor engine sealing and oil burning. I strongly recommend checking the owner’s manual or using a torque wrench for precision—never rely on guesswork to avoid costly repairs later. Safety first—this wisdom comes from hard-earned lessons.
