On the 617, I was trying to do it right, got a new tensioner and spring, but I can't for the life of me get the old bolt off that holds the spring and plunger in. Is it possible to reuse the housing and just replace the spring and plunger? Couldn't find much info about it.

Or, is it possible to buy a new bolt?

Annoyingly, it looks like other retailers are selling the same tensioner I bought on here but WITH the bolt...

-Rog