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Who is John Galt?
 
Rondinone's Avatar
 
Join Date: Jun 2003
Location: Knoxville, TN
Posts: 638
scratched, but not rusty torsion bar

Can it be peened and painted? Front bar, no rust, typical collapsed bushing (apparently). The rub mark is about 4mm long, 2mm wide, clearly rubbing. Can feel a slight ridge with fingernail. I'm temped to peen it and repaint the area with a phosphate paint. Anyone else try this? Thanks,

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'79 911sc Targa
'02 slk230 kompressor
'84 Tamiya Falcon

A democracy cannot exist as a permanent form of government. It can only exist until the voters discover that they can vote themselves largesse from the public treasury. From that moment on, the majority always votes for the candidates promising the most benefits from the public treasury with the result that a democracy always collapses over loose fiscal policy, always followed by a dictatorship. The average age of the world's greatest civilizations has been 200 years.
Old 03-15-2007, 05:27 PM
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Quicksilver's Avatar
 
Join Date: Jul 2002
Location: SC - (Aiken in the 'other' SC)
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You have a classic stress riser and the only way to alleviate it would be to blend it in with the surrounding area. The next question is what type of heat treating does the bar have? You would want to duplicate it. Peening is a good step to compress the surface and relieve stress but bars aren't that expensive.

It just isn't worth the risk. Just replace it.
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Old 03-15-2007, 05:44 PM
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Cory M's Avatar
 
Join Date: Oct 2004
Location: San Diego
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If the scratch isn't deep you can blend it with emory cloth and continue using. You want to remove any sharp edges or steps and make smooth. I don't see a need to re-heat treat the part. This all depends on the size and location of the scratch - post a picture of the scratch so we can give you a better assesment.
Old 03-15-2007, 06:50 PM
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Join Date: Nov 2004
Location: Greater Metropolitan Nimrod, Oregun
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It just isn't worth the risk. Just replace it.


!! Bears repeating.
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Old 03-15-2007, 09:20 PM
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Quicksilver's Avatar
 
Join Date: Jul 2002
Location: SC - (Aiken in the 'other' SC)
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Lets put it another way. People post here that they have had their bars fail for no reason at all.

Now you know you have a reason that it could fail. You know it because you are asking about it. Now think of how much money you will save if you bounce one corner of the car off of the ground when the bar breaks...

People are regularly changing their bar sizes so it is pretty easy and rather cheap to just pick up another bar over in the classified forum. It is cheap insurance.
__________________
- "Speed kills! How fast do you want to go?" - anon.
- "If More is better then Too Much is just right!!!" - Mad Mac Durgeloh

--
Wayne - 87 Carrera coupe -> The pooch.
Old 03-16-2007, 12:45 AM
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Who is John Galt?
 
Rondinone's Avatar
 
Join Date: Jun 2003
Location: Knoxville, TN
Posts: 638
OK Thanks, I'll replace it. Actually, this bar is from an entire set that I just purchased from another forum member, to replace my previously rusted bars. Seems I can't win!
__________________
'79 911sc Targa
'02 slk230 kompressor
'84 Tamiya Falcon

A democracy cannot exist as a permanent form of government. It can only exist until the voters discover that they can vote themselves largesse from the public treasury. From that moment on, the majority always votes for the candidates promising the most benefits from the public treasury with the result that a democracy always collapses over loose fiscal policy, always followed by a dictatorship. The average age of the world's greatest civilizations has been 200 years.
Old 03-16-2007, 03:46 AM
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Irrationally exuberant
 
ChrisBennet's Avatar
 
Join Date: Aug 2001
Location: Nashua, NH USA
Posts: 8,164
Garage
The front bars rub when the end cap (the one with the adjuster) rubs it's way into the aluminum crossmember just below the cap. Reach up and feel for a groove worn where the cap rubs. The fix is to add a little weld material to the bottom of the cap (smooth it out with a file) to restore the fit of the cap and alignment of the torsion bar in the control arm.
-Chris
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Old 03-16-2007, 04:18 AM
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Cory M's Avatar
 
Join Date: Oct 2004
Location: San Diego
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Do whatever makes you feel comfortable. The scratch you described sounds pretty minor to me (would have to see pics to be sure). The method I described is used to repair parts that are much more highly stressed that torsion bars with much greater consequenses in the event of failure. That said, stock torsion bars are cheap and plentiful. We have a set of stock SC bars in the garage- PM me if you're interested in them.

Old 03-16-2007, 06:43 AM
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