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Re: Help! Dealer woes . . .

Dan Bocek sez:
> Here's another interesting tidbit: of course I'm replacing all of the
> valve springs, but how do I know one won't break on me again in the
> future?  John at Sport Wheels suggested that we have the springs
> 'magnafluxed' to check for any initial stress in the metal.  Anyone
> know anything about this?
>                                                     Dan Bocek
>                                                     dan@di.com

Magnafluxing new valve springs seems like a bit of overkill to me --
its expensive, and for a complicated shape like a spring, very
difficult to do right (i.e.: difficult to get meaningful info from).
There are lots of magnaflux processes, some using visible light, most
using UV light, but all rely on the magnetic properties of the
material under test.  Magnaflux is commonly used on cranks (especially
after mods or racing use), rods, bearing caps, half shafts, etc.

If you are going to proceed with magnaflux examination, be sure to
hire someone who knows their stuff -- kits are available for
small-timers, but they are practically useless.  Places that do
airplane repairs (even small planes) are a good place to get
recomendations from; the FAA requires magnaflux examination on lots of
airplane parts.  If you can, watch -- its an interesting process, and
talking to the people that do it can be very enlightening.

fhd@panix.com  | I believe there are 15 747 724 136 275 002 577 605 653 961 181
1 212 559 5534 | 555 468 044 717 914 527 116 709 366 231 425 076 185 631 031
1 917 992 2248 | 296 protons in the universe, and the same number of
1 718 746 7061 | electrons.    -- A Eddington, _Philosophy of Physical Science_