Abstract: A structural unit for a gas exchange valve train of an internal combustion engine is provided. The structural unit includes a support element (8) having a joint head (7) and a valve lever (1) having a joint socket (6) which, together with the joint head, forms a joint for a pivotal mounting of the valve lever on the support element. The structural unit further includes an anti-loss device arranged on the joint, with the anti-loss device having one or more projections (11) extending from the opening of the joint socket while being directed toward the center of the joint socket, which projections retain the valve lever secure against loss on the support element through a positive-engagement behind a recess situated axially adjacent to the joint head. The invention further provides that the projections are configured in one piece with the joint socket.

Abstract: The camshaft phaser is affixed to one end of a concentric camshaft. The phaser is a vane-type camshaft phaser where the stator and the sprocket are fixed to the outer camshaft and the trigger wheel and rotor are fixed to the inner camshaft. The torsion spring is mounted on an outer wall of the stator, between the stator and the trigger wheel. The phaser is a compact unit with a high degree of reliability.