Method for assembling a module for a motor vehicle engine, which module comprises at least one cylinder head cover with bearing seats, and a camshaft which is mounted in the bearing seats, the camshaft being constructed during the assembly of the module from a support shaft and components to be connected to the support shaft, and the components having through openings for receiving the support shaft, characterized by the following method steps: a) a support shaft is provided which has local portions of widened diameter in the regions in which the components are to be fastened, and bearing sections in the regions in which the completed camshaft is to be mounted in the bearing seats, b) the components to be fastened on the support shaft are positioned in a predefined sequence in such a way that their through openings are arranged so as to be flush with the bearing seats of the cylinder head cover and are positioned at axial positions which do not correspond to the axial positions which the said components assume on the completed camshaft; c) the support shaft is cooled and/or the components are heated, with the result that the support shaft can be pushed with its portions of widened diameter and bearing sections through the bearing seats of the cylinder head cover and the through openings of the components; d) the support shaft is pushed through the bearing seats and the through openings, with the result that a bearing section of the support shaft is arranged in each bearing seat and a portion of widened diameter is arranged adjacently with respect to each component; e) the support shaft is heated and/or the components are cooled, with the result that the portions of widened diameter of the support shaft and the through openings of the components which are assigned to the portions of widened diameter have a predefined overlap; f) the components are pressed one after another onto the portions of widened diameter which are assigned to them or the portions of widened diameter are pressed one after another into the through openings of the components which are assigned to them, in each case the required angular position of each component relative to the support shaft being set before the pressing-on or pressing-in operation. a) a support shaft is provided which has local portions of widened diameter in the regions in which the components are to be fastened, and bearing sections in the regions in which the completed camshaft is to be mounted in the bearing seats, b) the components to be fastened on the support shaft are positioned in a predefined sequence in such a way that their through openings are arranged so as to be flush with the bearing seats of the cylinder head cover and are positioned at axial positions which do not correspond to the axial positions which the said components assume on the completed camshaft; c) the support shaft is cooled and/or the components are heated, with the result that the support shaft can be pushed with its portions of widened diameter and bearing sections through the bearing seats of the cylinder head cover and the through openings of the components; d) the support shaft is pushed through the bearing seats and the through openings, with the result that a bearing section of the support shaft is arranged in each bearing seat and a portion of widened diameter is arranged adjacently with respect to each component; e) the support shaft is heated and/or the components are cooled, with the result that the portions of widened diameter of the support shaft and the through openings of the components which are assigned to the portions of widened diameter have a predefined overlap; f) the components are pressed one after another onto the portions of widened diameter which are assigned to them or the portions of widened diameter are pressed one after another into the through openings of the components which are assigned to them, in each case the required angular position of each component relative to the support shaft being set before the pressing-on or pressing-in operation.