This eng. has a chain, replace it when you HEAR it!!! It should go 150,000 or more.
If you hear a metallic rattle (especially on cold start up) or any time engine is running
then it is time to replace the timing componets! Leave the music off any time you start any engine
and listen, it can save some $ one day. But nobody does that right cause it takes all of about 10 seconds.