The ACUME project aims at developing a non-invasive diagnostic tool for the engines of historical vehicles conserved in museums and collections. This tool will help conservator-restorers to make a decision and implement the reactivation of engines stopped for long time. The Acoustic Emission (AE) technique allows to detect malfunctions before they are audible by human ear. It is used in the field of automotive industry for the diagnostic of new engines and in different fields of cultural heritage for the evaluation of historical objects and artworks.