he cylinder head and the piston rod assembly

Applied before assembly gasoline or cleaning the oil ( non- diesel and kerosene ) Clean all mounting hardware, and head outside the ring groove residue silk or cotton hairless clean , before loading seals, and should the sealing member and the contact surface of the guide sleeve coated with  Hydraulic ferrules  oil ( non- dry assembly ) . Best when loaded piston cylinder head tooling from the horizontal or vertical direction for assembly , to ensure the two concentric before lightly scored with a hard stick . When conditions also can be processed a guide sleeve , and then with the nut screwed into or hardwood , so that not only protects the seal surface , but also to ensure a smooth cylinder head into the cylinder bore .