 hub corrosion, fixable? |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
| mskala |
 Aug 27 2013, 08:31 PM
Post
#1
|
|
R  Group: Members Posts: 1,935 Joined: 2-January 03 From: Massachusetts Member No.: 79 Region Association: None 
 |
914-6 front hubs. When removing all the brake dust, found
several spots where whatever coating has been compromised and the aluminum started getting eaten. Can this be welded up? These don't look anodized, what did they do to the surface to protect?  |
   |
 
|
  |
Replies(1 - 8)
| Woody |
Aug 27 2013, 08:40 PM
Post
#2
|
|
Sandbox Rabblerouser and head toilet scrubber Group: Members Posts: 3,858 Joined: 28-December 10 From: San Antonio Texas Member No.: 12,530 Region Association: Southwest Region |
I believe they're magnesium.
|
|
|
|
| Eric_Shea |
Aug 27 2013, 09:42 PM
Post
#3
|
|
PMB Performance Group: Admin Posts: 19,304 Joined: 3-September 03 From: Salt Lake City, UT Member No.: 1,110 Region Association: Rocky Mountains  |
They're aluminum and they're anodized.
We've done a pair for a customer. Not worth worrying about IMO but, the process would be: 1. De-Anodize 2. Remove blemish with media of your choice. I'd use glass or walnut. 3. Re-anodize. 4. Write a check. (IMG:style_emoticons/default/wink.gif) |
|
|
|
| pcar916 |
Aug 28 2013, 07:15 AM
Post
#4
|
|
Is that a Lola? Group: Members Posts: 1,523 Joined: 2-June 05 From: Little Rock, AR Member No.: 4,188 Region Association: None
|
Mine have been welded in a couple of spots, and epoxied in another, by the PO. I assume corrosion was his problem as well.
I prefer Eric's solution rather than the heat of a welding, especially since that piece is one huge sink, but there have been no problems and they run true. |
|
|
|
| mskala |
Aug 28 2013, 07:52 AM
Post
#5
|
|
R Group: Members Posts: 1,935 Joined: 2-January 03 From: Massachusetts Member No.: 79 Region Association: None
|
Well it sounds like I'm just going to be keeping these in the basement for
backups, then. I like the idea of epoxy to keep any more of this from happening while stored. |
|
|
|
| pcar916 |
Aug 28 2013, 09:29 AM
Post
#6
|
|
Is that a Lola? Group: Members Posts: 1,523 Joined: 2-June 05 From: Little Rock, AR Member No.: 4,188 Region Association: None
|
QUOTE(mskala @ Aug 28 2013, 08:52 AM)  I like the idea of epoxy to keep any more of this from happening while stored. For those folks new to metals and don't know, regardless of the fix, proper surface-prep is always the key to happiness. True for all materials actually... and humans as well. The oxidized aluminum has to be completely gone for the repair to be "permanent", and Eric's solution is the best one in the "permanent" category. Mine has been fine for the 17 years I've owned the car. The PO had installed those '79 Bilstein struts ~ 5 years earlier than that if I remember clearly. So epoxy seems to work fine. Frankly I'm a little surprised at it's durability in such a high heat and vibration environment. If it were my epoxy solution I'd mix in some aluminum powder into the epoxy to try and match the expansion / contraction rates with the hub. Good luck (IMG:style_emoticons/default/beerchug.gif) |
|
|
|
| Mark Henry |
Aug 28 2013, 09:35 AM
Post
#7
|
|
that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
I blasted and JB weld in the small pits on mine.
QUOTE(pcar916 @ Aug 28 2013, 11:29 AM) If it were my epoxy solution I'd mix in some aluminum powder into the epoxy to try and match the expansion / contraction rates with the hub. Good luck (IMG:style_emoticons/default/beerchug.gif) BTW JB weld must have metal in it, it's magnetic when you first mix it up try putting a magnet near it. (IMG:style_emoticons/default/smile.gif) |
|
|
|
| pcar916 |
Aug 28 2013, 10:05 AM
Post
#8
|
|
Is that a Lola? Group: Members Posts: 1,523 Joined: 2-June 05 From: Little Rock, AR Member No.: 4,188 Region Association: None
|
QUOTE(Mark Henry @ Aug 28 2013, 10:35 AM) BTW JB weld must have metal in it, it's magnetic when you first mix it up try putting a magnet near it. (IMG:style_emoticons/default/smile.gif) I agree completely. But any time I epoxy a thing I try to make sure it's mixed with a finely ground powder of the same material. It may not matter in this case, and I wouldn't worry about bi-metallic corrosion embedded in the epoxy. But the expansion rate will be closer if it's aluminum... Hmmm. Does JBWeld have an aluminum version? I don't use it that often. |
|
|
|
| r_towle |
Aug 28 2013, 10:45 AM
Post
#9
|
|
Custom Member Group: Members Posts: 24,705 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
|
Mark,
I have a mill, and a sandblasting cabinet you are welcome to use if you get inspired to DIY this. Rich |
|
|
|
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 6th July 2025 - 02:00 PM |
Invision Power Board
v9.1.4 © 2025 IPS, Inc.