turbo noise or exhaust leak?

[JimT]

so I've been reading up on other's posts regarding broken bolts. I now understand Rawze's comment about the level of rust on the bolts. It also seems like a possible cause for #1 and #6 bolt failures could be a failure of the expansion joint(s) on the manifold. I wasn't even aware they were separate pieces when I did my inframe. Should I consider replacing them or just attempt to take them apart and clean up the connections? I don't want to needlessly replace parts, but I also don't want to just throw new bolts on if there's an underlying cause that could lead to repeated failure. Local Cummins isn't open until monday and I'd like to have my shopping list figured out since it's over an hour trip each way.