Are cracks in a mag wheel...

[recycled sixtie]

obvious? I dropped a mag wheel on the concrete garage floor. I was planning on selling the four Lexus mags which I do not need anymore. Can you have a crack in it and not be obvious to the naked eye? Does a tire have to be put on it first to see if there is a slow leak in it? Or is there a special spray that I can use which would emphasize if there is a crack?

Thanks all,
Guy

[HobieMarty]

Mag wheel? Groovy man, far out, that's like a total gas!!! I like, totally dig a b*tchin mag wheel, mags are boss!!!

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[Scott Douglas]

I'd give it a 'ring' test like you do to a stone wheel before putting it on a bench grinder.
Does it 'ring' like the others?
I think a crack will cause it to have a different sound to it.
Mounting a tire and water testing would be the next move.

[fastfredracing]

I honestly think it would take a whole lot more than a waist level drop on a concrete floor to crack a factory aluminum wheel . Usually, when I find a crack, it is accompainied by a large dent, and some suspension repair.
You should be able to visibly see a crack, but I have had a few over the years, where I could see air leak out through the wheel, yet not really be able to see the " crack " per se .
A factory Lexus aluminum wheel, is a quality, thick aluminum wheel, If I were a betting man Id just send it

[javadog]

It's not "mag" it's aluminum.

And dropping one will bend it before it cracks it.

If you want to waste some money anyway, look around a large airport for a facility that does dye penetrate inspection.

[70SATMan]

Wake up, Maggie, I think I got somethin' to say to you
It's late September and I really should be back at school
I know I keep you amused, but I feel I'm being used
Oh, Maggie, I couldn't have tried any more

[908/930]

How far did it drop? Did it dent? Something like Ardrox P6R Dye and 9D1B developer would work well but it is about $50 for the two cans. You could try using a non permanent magic marker on that area and then wipe the surface clean to try and show any cracks, check that it does not stain your rim surface coating first.

[1990C4S]

Originally Posted by javadog

If you want to waste some money anyway, look around a large airport for a facility that does dye penetrate inspection.

Find a forklift inspector. They will do it cheaper. They do masts and forks.

[Bill Douglas]

Another idea is to take it to your tire centre/wheel balancing guy.

I had bought a set of Fuchs I was a bit suspicious about and took them to my wheel balancing guy. He noticed a repair that I hadn't seen, spun it up on the balancing machine, and said the wheel would never be right. Hence sent them back.

These guys are experts at spotting faults.

[javadog]

Originally Posted by 1990C4S

Find a forklift inspector. They will do it cheaper. They do masts and forks.

Not sure they'd be equipped to do aluminum, as I figure that they mostly check steel parts. Next time I need that service, I'll check it out.