[Vwdiesel] Broken Exhaust Studs

[Erik Lane]

my dad has an 83 diesel vanagon, and i've pulled the
motor a few times and whenever i do much work on the
bottom side of the engine i find it SO much easier to
have the exhaust and heat shields out of the way. so
i've taken it off and put it on somewhere from 15-20
times or so. his bolts are also a little rusty, but
nothing really out of the ordinary. i've never had any
problems with them. could be just luck, but i don't
think i have THAT much! :)

this vanagon has something like 160k on it now, and
still all original exhaust parts, including the studs
and nuts. so i don't think that vibration or heat
expansion is really that much of a factor. course, i
could be wrong, but so far it's worked for me.

good luck!
erik


--- Mary Beth and Chris Geiser <geiser at execpc.com>
wrote:

> The Vanagon diesel uses studs/nuts from the exhaust
> manifold to the
> first exhaust pipe instead of those spring clip
> things they use on the
> cars.  3 of the four of mine are broke.  Took the
> manifold off yesterday
> and the three broken ones still have enough nubby's
> on them to get a
> vice grip on, so they're busy soaking in Liquid
> Wrench for the next few
> days... the fourth came right out with the stud
> attached - woo hoo!!
> 
> A few questions as I'm reassembling:  The First
> exhaust pipe is bolted
> to the manifold, then it makes a few turns and is
> attached to the
> muffler which runs longitudinally along the back of
> the van on it's
> hangers.  The whole system is bolted together and
> must vibrate / flex as
> a unit - is there some type of flex pipe that I
> should have welded in
> there to save stress on these exhaust studs?  I
> assume mine broke
> because they were 23 yrs old and corroded to crap,
> but may have lasted
> longer without the whole deal vibrating as one unit?
> 
> Secondly - This is really the first exhaust work
> I've done - is there a
> special kind of material that the nut on the exhaust
> stud should be made
> of to prevent some of this corrosion?  Should I use
> stainless steel nuts
> or is there something better?
> 
> Thanks,
> 
> Chris
> 
> 
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