<VV> Broken Crank!

[jvhroberts at aol.com]

 Given that the balancing holes aren't in the most stressed part of the crank, I'd say they are the victim, not the culprit, as you pointed out. Still noodling over this fatigue issue and harmonic balancers. I wonder if a dual mass flywheel, like some modern cars have (such as my Subaru) would act as a damper for the power end as well? 

 

John Roberts
 

 

-----Original Message-----
From: Marty Scarr <martyscarr at gmail.com>
To: virtualvairs at corvair.org
Sent: Mon, May 3, 2010 5:24 pm
Subject: Re: <VV> Broken Crank!


 It *does* look like the balancing hole might be the culprit, but I think
after the rods are removed and the crank is out, it will show a fracture
originating at the rod journal.

Pictures of another broken crank saga are here:
http://home.hiwaay.net/~langford/corvair/flexplate/problem.html

<http://home.hiwaay.net/~langford/corvair/flexplate/problem.html>Marty Scarr



On Mon, May 3, 2010 at 2:12 PM, Kinzelman, Andy <
akinzelm at greatnortherncorp.com> wrote:

> Guys,
> In my opinion - the balancing drill was too close to the edge of the throw
> - and made a weak point Look at it again).  Although it lasted a long time -
> it is still a weak point.
> Andy K.
> Wisconsin
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