Patent ID: 8819909

Claim:
A tool for fitting valve keys to a valve of an engine, the engine having a valve stem with an upper end and at least one annular groove for fixing the valve keys, the tool comprising: an elongate holder with a longitudinal axis, an inner cavity and an end opening through which the upper end of the valve stem can be introduced into a hollow cavity in a holder; an elongate core arranged in the hollow cavity in the holder coaxially with the longitudinal axis and having an end region accessible through the end opening; and at least one transport passage extending in a direction of the longitudinal axis externally on the core and to before the end region of the core for feeding valve keys to a valve, wherein the at least one transport passage is laterally delimited at least partially by a guide jaw arranged moveably relative to the holder and at least partially by the elongate core which is fixed immovably in the hollow space in the holder, and wherein an elongate recess is provided in the end region of the core coaxially with the longitudinal axis for receiving a substantial upper portion of the valve stem, wherein the recess of the core opens into the end opening and is of a depth greater than or at least equal to an axial spacing between the end and the annular groove of the valve stem so that the end region, upon reception of the upper portion of a valve stem, at least partially covers over the at least one annular groove so that the valve keys can be fed beneath the at least one annular groove to a peripheral surface of a valve stem.