[Vwdiesel] Broken Exhaust Studs

Val Christian val at swamps.roc.ny.us
Mon Aug 9 09:29:29 EDT 2004


The story I hear is to use brass nuts.  In fact the last set of exhaust 
retainer bolts, springs and nuts I got had steel and brass nuts in the 
kit.

For high temp, you need the right SS.  I can't tell you what grade.  
More common SS (304 or 305??) gets to soft and gummy.

Good luck.

Val


> 
> 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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