Fugou Longli Cylinder Cover Co., LTD. is an important part for sealing the engine block. Its role is to seal the upper part of the engine cylinder. Under certain conditions, the cylinder head, together with the top of the engine piston and the engine cylinder wall, forms the combustion chamber of the engine. Due to maintenance or other factors, the cylinder head of the engine may warp, deform, or burst during operation, forcing the engine to malfunction. The article explores the disassembly technology of engine cylinder heads, the maintenance technology of cylinder head flatness, the repair technology of cylinder head cracks, and the welding repair technology after explosion. Disassembly and assembly technology of cylinder head of Fugou Longli Cylinder Cover Co., LTD. When the engine cylinder and head are deformed, cracked and other faults occur, the cylinder head needs to be removed for maintenance, and installed on the engine after repair. Therefore, the disassembly and assembly technology of the cylinder head is an important component of the engine cylinder head maintenance technology. When disassembling the cylinder head, it is necessary to first remove the relevant accessories on the engine cylinder head, such as the intake and exhaust manifold, spark plugs, etc. After removing the relevant accessories on the engine cylinder head, the cylinder head can be removed. However, without reliable lifting equipment, special care should be taken when removing the intake and exhaust pipes and cylinder heads together to prevent excessive force from damaging the engine cylinder head gasket. When disassembling the engine cylinder head in winter, special attention should be paid to gently unscrew the bolts of the cylinder head to prevent it from bursting. When installing the cylinder head, special attention should be paid to the fact that there is a locating pin hole below the first and third spark plug holes of each cylinder head in the engine. During installation, the locating pin hole on the cylinder head should be aligned with the locating pin on the cylinder block, otherwise it will affect the operation of the engine. When installing the cylinder head, it is also necessary to pay attention to installing small round shoulder bolts near the sealing gasket at the edge of the valve cover. If large non round shoulder bolts are used, they will crush the sealing gasket and cause engine oil leakage. During installation, attention should also be paid to cleaning the oil stains and iron filings near the bolt holes in the cylinder block. Attention should be paid to tightening the cylinder head bolts. When replacing the cylinder head bolts, high-quality bolts must be selected, otherwise it may cause engine oil leakage failure.Fugou Longli Cylinder Cover Co., LTD.  Longli Cylinder