Member l1tech writes in previous post:
"The tensioners are known to fail and that is an easy fix but the real problems start when a guide breaks. Don't stress over it, nothing you can do is going to make a difference of wether it happens or not. Easy enough job to replace everything especially if you are a mechanic but the engine does have to come out and you do need the timing tools....NO WAY AROUND IT. I used to do one of these every few months it seemed like but the last one was probably about a year ago on a ST that had blown head gaskets that I picked up for a good price and flipped for a nice profit."
If engine has to come out that's way more than I'd want to tackle.