Is there a trick to V-Band Clamps?

TYTILIDIE

METH HEAD
I don't know what the deal here is but I can not get my v-band to stop leaking. It is on the back of the turbo. The downpipe is just flared out for it but no matter how tight it is it just wont stop!! I even tried a gasket, no dice!
 

skipztt

boost
Re: Is there a trick to V-Band Clamps?

is it the style that, slips into the turbo housing?? or is it just the flat style??
 

gstjohn

Sycloned S-10
Re: Is there a trick to V-Band Clamps?

If it is a true v band clamp you have to tap around the clamp as your tightening it. We have these on the exhaust on the helicopters I work on and you tighen the clamp then tap it with a deadblow hammer. You have to seat the clamp if you tap it a few times around you can usually tighten it more, until you tap and it won't tighten anymore.

Hope that helps.
 

TYTILIDIE

METH HEAD
Re: Is there a trick to V-Band Clamps?

What do you mean? Im not sure how else it would be done. On my TY, I bought vbands with flanges for both surfaces, they were flat and face inwards to each other. That was for some exhaust piping I did. This is a little different, the mating surface on the turbo is rounded off. It is supposed to be that way. So unless there is a matching flange, which I have never seen, a flared piece of exhaust pipe would the only way I could see it work.
 

vortecfiero

New member
Re: Is there a trick to V-Band Clamps?

the down pipe should have a v band ring welded on to it to ensure flat mating surfaces
and a solid edge for the band to pull against. the rings are not expensive. the best ones
have a male and female ridge on the rings ring to ensure alignment. ive even machined
the female ridge into the turbine side to use the male side one the down pipe.
 

TYTILIDIE

METH HEAD
Re: Is there a trick to V-Band Clamps?

Where would I find this ring? I looked on ebay and didn't see anything.
 

JSM

Active member
Re: Is there a trick to V-Band Clamps?

V-Bands were originally built for aircraft tubing and duct work. Being I was in that industry I had to write cnc programs for them, had the specs at one time.

You can't make a true v-band flange by flaring a tube, impossible hence why its not sealing. There is an angle that must be present for clamp to work, as well as a width to the flange itself.

With that said not all flanges on car market now follow that spec, some manufactures probably have no idea where the design started or was used first.
 

MRKING

New Parts for Old Trucks
Re: Is there a trick to V-Band Clamps?

Mike , I have an extra v band flange from when i built my crossover you can have . Its a 2.5 so im not sure if it will work . LMK
 
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