[V8] Not just headache, butbone numbing cold too!

[Dave Saad]

Stainless is fairly soft - I doubt it has the strength these bolts  
need.  I would not try to re-engineer this - just get the hardware  
called for, install it to spec, and you will be fine.

I am guilty of re-using hardware here, but I am careful about torque  
specs, and I use loctite. So far so good...
And, on torque specs,  it seems lots of people have problems with sub- 
frame bolts.  Since I reuse these bolts, and since they are already  
"stretched", I torque to spec + just a little more. I do not go the  
full extra 1/4 turn.  Probably should locktite them too. I can't  
remember if I did that step, but I have had the subframe off many  
times over the years, and no stripped or loose hardware problems.



On Feb 6, 2010, at 11:14 AM, NIck Miller wrote:

> I had thought of Scott's site after the fact, but yes, invaluable  
> info.  I'm
> thinking while I do this I'm going to take all the Tech drawings in  
> ETKA and
> color all the bolts and make a table with torque specs by color for  
> the
> archive, perhaps.  Might be usefull.
>
> On "Torque to Yield" bolts, or stretch type bolts as I think some  
> call them,
>
> Where can I get these?  I suppose dealer only?  It would be a good  
> idea to
> use these types when rebuilding the suspension I didn't think about  
> it.  I
> was going to get all stainless hardware w/nylocs, but the  
> stretchable bolts
> are superior at what they do, technically.  Obviously you can't re- 
> use them
> though..
>
> we learned a bit about this type of bolt in mechanics of materials.   
> Its a
> very similar bolt to those which you use on the big end or a piston  
> rod.
> You want a necked down bolt and then it actually gains most of its  
> holding
> power from the stretching when you torque it to spec.
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