Date registered: May 2014
Vehicle: 1998 E320 4matic Wagon, 1981 Yamaha Maxim XJ650
Location: Akron, OH
Mentioned: 0 Post(s)
Quoted: 18 Post(s)
Youtube is a good resource, there are good videos to show how a bad pulley will look and sound.
I'm the kind to replace parts while I'm in there, rather than when they fail. My winter beater is a Honda Civic, and I had to do a timing belt this summer. So while I was in there doing the timing belt it got every gasket and seal I knew it needed/would need soon, it beats tearing everything apart again when something else fails. It'd be an awful shame to break/shred this new belt if a pulley locks up later on down the road. But, a good inspection of all of your pulleys should be enough to determine if this is an imminent threat.