[TR] question on magnesium wheels

[McGaheyRx at aol.com]

Andrew's question specifically names some Magnesium wheels - when you've  
had sets of both AL and Mg, its pretty easy to tell the difference. I have an 
 American Racing Mg with a hairline crack in one of the spokes and would 
love to  get it repaired - but, so far, everybody I talk to about welding Mg 
looks at me  like I just said "here, hold this stick of dynamite while i 
light it"
 
Damaged Aluminum wheels, on the other hand, absolutely can be straightened  
if bent and welded if cracked.  Please specify how you can say "with some  
authority" that companies doing this should not be guaranteeing their  work.
 
Can you direct us to any race sanctioning body regulation that prohibits  
use of repaired wheels? I'm not aware of any and don't see how this could be  
enforced without x-raying every wheel.  
 
 
Cheers,
Jack Mc
 
 
 
 
 
 
In a message dated 7/7/2011 7:37:51 P.M. Eastern Daylight Time,  
jdinnis at gmail.com writes:

First  off most "mag" wheels are aluminum not magnesium.  Second, no  they
cannot be safely repaired regardless of which material they are made  from.
There are many companies that do repair these wheels, but I can say  with
some authority that they will not be as strong as they were  originally.  
For
normal street use, you might be ok, but you are  taking a great risk in 
using
repaired alloy wheels.  Most racing  organizations specifically ban repairs
to alloy wheels.   About  all they are really good for is the set of wheels
that you put on after you  get your car to the show field and take off 
before
you leave the show  field.

On Thu, Jul 7, 2011 at 5:06 PM, Andrew  Uprichard
<auprichard at uprichard.net>wrote:

> Oh all-knowing  ones:
>
> Can magnesium wheels (torq thrust, American racing  Silverstone, came on
> triumphs) be repaired?  My recollection of  chemistry would suggest that 
Mg
> +
> heat = nasty explosion, but  what if you have a wheel with a cracked rim?
>
> Andrew  Uprichard
>
>
> triumphs at autox.team.net
>
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