Device for detecting sealing performance of exhaust manifold of automobile engine

The utility model discloses an automobile engine exhaust manifold sealing detection device, and relates to the technical field of exhaust manifolds. The exhaust manifold comprises an exhaust manifold body and a shell, the exhaust manifold body is arranged in the shell, a notch is formed in the top face of the shell, the exhaust manifold body is placed in the shell through the notch, and the bottom end of the exhaust manifold body is in threaded connection with the inner bottom face of the shell through a bolt. The top end of the exhaust manifold body penetrates through the shell through the notch and extends to the outside, and the top of the shell is provided with a sealing plate, a mounting piece, a first arc-shaped pipe and a second arc-shaped pipe which are matched with the notch. The exhaust manifold body is installed in the shell, the installation piece and the sealing plate are installed to enable the interior of the shell to be sealed, the air pump is driven to enable the interior of the shell to be k