Any tricks or sage wisdom to getting crappy turbo V-clamp flanges to seal?

Anybody have any tricks or tips to getting beat up V-band turbo flanges to seal?

I have a V-band flange on my compressor output, the aluminum face on the compressor is a bit dinged up from shipping and I have a section of my stock downpipe clamped onto it since I'm big on recycling.


I suspect it might be leaking a bit there. I have my real bad siren noises above 5 PSI reduced to just annoying whistles above 25 PSI now.


Is there some sort of gasket material I can clamp in there? Hell, is it supposed to have a gasket stock?

I mean, heck, where could a leak be anyways? :ugh:

An orbital to the face of the flange maybe? I went with Vibrant every time I had to purchase them. Sucks to pay for them, but they are solid.

Ive used valve lapping compound before. Applied the band clamp lightly and rotated the housing back and forth. It's painfully slow going however.

I've pinched the v band in the vise so it will clamp harder. And put some good rtv on the face of the outlet. Has held 70psi for awhile on mine