For a long time I used long bolts with rather stiff springs from a hardware
store or home center.  I generally use stainless steel fasteners for
exhaust ( 5/16" when I could not get 8 mm). The problem was that I could
never find SS springs and the ordinary ones would rust away eventually.
Recently I switched to SS flat washers and lock washers, alternating, three
or four of each in a sandwich on each bolt.  Seems to work so far.

Larry A.

On Mon, Aug 10, 2015 at 2:00 PM, John Rodgers <jrodgers113@gmail.com> wrote:

> I have run into a problem. The J-pipe has broken right at the 2 into 1 cast
> iron collector. I have a replacement.
>
> Upon close examination, it is clear that break is an expansion stress
> break. Also, it's clear that connection is supposed to be an expansion
> join. But like the 'lil boy  sez "It ain't happening!" Therefore I have a
> broken J-pipe.
>
> Bentley ( page 26.9) shows that joint assembled with 5 DIAPHRAGM SPRINGS on
> each of 3 bolts. Mine has none. So far, list vendors I have contacted don't
> use or sell these, so they say, and haven't seen them. I have a problem
> with that, because I KNOW that is an expansion joint and has to have a way
> to relieve the stress of expansion due to heating and cooling.
>
> Can someone enlighten me about this? Tell me where to get Diaphragm Springs
> - by that or another name?  I don't want to put this back together unless
> it is right and can give under heat in that joint.
>
> Thanks
>
> John
>