Abstract: A tensioner that includes a mount, a pair of tensioner arms, and a spring. The mount defines a movement axis. Each tensioner arm assembly has a first tensioner arm, which is coupled to the mount for sliding movement about the movement axis, a tensioner pulley and a spring guide. The tensioner pulley and the spring guide are coupled to an associated tensioner arm for movement therewith. The spring is mounted on the spring guides and biases the tensioner arm assemblies about the movement axis in respective directions that urge the tensioner pulleys toward one another.

Abstract: A guide device for a chain of an internal combustion engine includes a support structure and a body. The support structure is mounted to the engine and has at least one protruding body at one end of the structure on a first side. The body has a chain sliding surface that slidably receives the chain. Opposite the chain sliding face is a seat for receiving the protruding body of the support structure. The seat is symmetrically shaped and receives the protruding body in a first position and a second position. The first position is specular to the second position.