Turbo exhaust leak

[Magard]

I have a 500 series turbo that is leaking exhaust between the hot housing and the cartridge the seal where the big v clamp is Looked on quick serve but I can’t find a gasket there. I found that clamp was a little loose. I have tightened it but still leaking. I have a little soot on the side of the actuator because that’s where the clamp comes together. I can’t hear anything but I can smell it. Should I just loose it and reset it or is there a gasket there that needs replaced.