Aluminum automobile engine rear shell positioning tool

The invention discloses an aluminum automobile engine rear shell positioning tool. A supporting column penetrates through a special pressing plate and is connected with a connecting support through alocking screw, the connecting support is connected with a positioning pin through four connecting screws and cushion blocks, and a guide rod is connected with a clamp body (33) through the connectingsupport (29); a buoyancy supporting cylinder is provided with a supporting rod, and an end surface positioning seat is connected with the clamp body (33) through two connecting screws; the supportingseat is connected with the clamp body (33) through four connecting screws and cushion blocks; and the buoyancy supporting cylinder is connected with the end face positioning seat through a lever pressing device. By adopting the structure, the auxiliary parts are all standard parts, the interchangeability of the parts is greatly improved, the equipment capacity is improved, and the practicability is extremely high. 一种铝质汽车发动机