On 10/9/04 8:23 PM, "Jim Felder" <felder@KNOLOGY.NET> wrote:

> I agree the he da man. I bookmark a lot of his stuff for the occasion
> in the future when I will have to rebuild my engine, certainly he is a
> greater authority than I am. I'm not suggesting otherwise.  I haven't
> gone to look up his opinions on this issue specifically so I don't know
> specifically about what you're quoting, but my machinist's training
> tells me that ovalizing is ovalizing through distortion, and bolt
> stretching--if it is indeed happening--is a whole other thing. Either
> the part is deforming or the bolts are stretching. If the part is
> ovalized or distorted out of shape, then different bolts won't help. It
> needs to be thrown away. If the part isn't oval but the bolts are
> stretched, then it isn't "ovalized," it's simply loose.
> 
> 
> Jim
> 
> On Oct 9, 2004, at 8:45 PM, John Rodgers wrote:
> 
I don�t have boston bobs experience with vw wb engines but I have worked
quite a few engines with stretch rod bolts, several japanese engines use
them.  I have never seen a failure that I would have blamed on the bolts.
Have seen engines with mishappen crank bearing surfaces but the bolts were
still connected correctly. What could be happening though is that with the
bearing going out of spec forces could start working on the bolt and
overstress it.  Then all kinds of not good stuff could happen.  I would
wonder what the rating was on the vw bolts in the 2.1 in the first place.

Remember that in the 80s nobody was building engines that they expected to
run 150k miles.  Nobody kept vehicles that long.

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jimt
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