Grinding fuchs ??

[jeos]

hi. I'm grinding my fuchs wheels 7x16 so they can be polished but there is some salt corrosion in aluminum, now my question is, how much can I grind (they now measures 4.5 mm in thickness on the horizontal location ??
(I'm afraid they might become too thin in goods)




regards.
John

[jeos]

[Flat Six]

1) Grind until corrosion disappears
2) Polish
3) Mount then drive
4) Crash due to catastrophic wheel failure
5) Kill self, passenger, pedestrians, other motorists
6) Have estate part out 911 in feeble attempt to compensate victims

or

Send to professional

or

Purchase replacements

If you're going to be foolish enough to do this yourself, please don't troll here for potential co-defendants. Take the risks on your own.

Maybe I'm getting grumpy in my old age, but IMHO this is ridiculous bordering on criminally negligent.

[jeos]

Originally Posted by Flat Six

1) Grind until corrosion disappears
2) Polish
3) Mount then drive
4) Crash due to catastrophic wheel failure
5) Kill self, passenger, pedestrians, other motorists
6) Have estate part out 911 in feeble attempt to compensate victims

or

Send to professional

or

Purchase replacements

If you're going to be foolish enough to do this yourself, please don't troll here for potential co-defendants. Take the risks on your own.

Maybe I'm getting grumpy in my old age, but IMHO this is ridiculous bordering on criminally negligent.

There are lots of porsche people who like to grind their rims to get scratches and anodization away, then everybody can be idiots who grinder without knowing what the minimum target should be ??

regards
John

[euro911sc]

I think the word 'grind' is not the word you are looking for. The word you might be wanting to use is sand. Grind implies the removal of a lot more material.

I would sand down the whole wheel and see where you have corrosion left. Then focus sand those spots and see if you can get it to where you are happy. There are several threads here on how to re-finish your wheel to professional quality so do a little searching and you will get lots of info.

As for thickness spec., I would say the wheel is useless if you have to grind it to get the corrosion away. If you have curb rash you can use a light file to repair or tone down the rash.

-Michael

[Flat Six]

Originally Posted by jeos

There are lots of porsche people who like to grind their rims to get scratches and anodization away, then everybody can be idiots who grinder without knowing what the minimum target should be ??

regards
John

Exactly the point, John. If someone's going to be an idiot with a grinder they should do it on their own based on their own judgement -- not anyone elses -- and accept the consequences.

Anyone who provides an answer to this question potentially invites implied liability for the outcome ("geez, Flat Six said it was safe to grind down to 3mm but now my wheel's ruined and my car's totaled -- I'm gonna sue . . ."), not to mention the potential liability of PParts corporately and personal liability of Wayne and individual forum moderators (who, plaintiffs will argue, knowingly promoted the sharing and archiving of dangerous and potentially deadly advice). Including 'YMMV' in a response ain't gonna hold up in court.

I understand others have done this and you're just looking for some advice. I'm not trying to be an a**hole, but sometimes the enthusiasm for our projects and this community's expertise and willingness to share it can take us down a path of unintended consequences and unforseen risk.

Perhaps you'd get better response (e.g., answers to your actual question) if you request responses via PM instead?

[bigel]

Flat Six - Certainly you're not implying that something stated on a self-help forum could be admissable in a court of law, are you? That would be right up there with the Ozzy Ozborn lawsuit vis-a-vis teen suicide...That's just crazy!

[CCM911]

Lighten up Francis.

[jeos]

When I do something I usually do it so it keeps tollerance, I just thought that perhaps there were some who havede target rim edges (+ / - tollerance), because when they were produced locally at the factory there was (+ / - tollerancer ) and I will be 100% sure that they keep the minimum goal. There is a book about this topic?

regards
John

[CCM911]

You will know when you've gone too far. Have you removed the clear coat already?

[jeos]

There must be some who have knowledge about these thicknesses?

[timchar]

Poor guys asking for advice on rims, not legal advice... Gimme a break! Grumpy guy, go take your Porsche for a spin, you'll feel better..

[CCM911]

+1 Probably one of those guys that never goes over seventy on public roads. We are on a 911 forum, correct?

Originally Posted by timchar

Poor guys asking for advice on rims, not legal advice... Gimme a break! Grumpy guy, go take your Porsche for a spin, you'll feel better..

[Kevin Stewart]

if its light corrosion just sand it out and polish it, i dought the corrosion is bad enough to destroy the wheels, Kevin

[DanielDudley]

Take as little as possible. Use the oven cleaner method to get the anodizing out. I have used flap wheels to strip outer rims, but obviously you need to stop as soon as possible, and use the least abrasive grit possible to do the job.

Consider that the corrosion has already taken some of the material, most likely not a lot.