5.9 mag tear down with pics...no tensioner?

They were for the 3.9L originally but you may find them on any Magnum that had a timing chain done. I use tensioners on all the small block I build. Never had an issue with them coming apart, but admittedly most of the engines I've built have not reached 30-40K miles since the rebuild. I do have some over 20K but no reports of issues.