is there anything you can do with a rusty chain??

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49autocycledeluxe

I live for the CABE
May 29, 2017
1,303
59
fremont california
changed a bike from standard chain to skip tooth, I had a stiff skip tooth chain here and soaked it in WD40 and worked all the stiff links until it was like a good chain. put it on and it creaks and groans like it is ready to break. .... probably won't break but the noise is annoying and this will not do.

is there anything we can do with a crusty skip tooth that could save it? soak it in molasses or something to kill the rust? I have one more crusty chain to try before I spend more money on a better one.
 

rustjunkie

Moderator
Staff member
Jul 11, 2012
13,334
Monrovia, CA 91016
www.rustjunkies.com
pics of the cog?
also: count the links, pull the chain out flat and measure it, should be very close to the same.
sounds like either or both the chain and cog are worn and no longer matching in pitch.
noise from worn chain/cog is common, especially when introducing old drivetrain parts that didn’t grow old together.
 

GTs58

I'm the Wiz, and nobody beats me!
Sep 2, 2012
10,816
Central Arizona
I've heard Evaporust works good on chains.
 

spoker

Riding a '38 Autocycle Deluxe
Mar 3, 2011
5,200
Minneapolis, United States
put it in evapo-rust over nite if that doesnt fix it the pins are bent,prolly ezer to just get a new one
 

bikecrazy

I live for the CABE
Dec 8, 2011
1,067
Mentor, United States
I would just ride the hell out of it. Make sure to keep it oiled up good. Any rust build up should wear away in time. If that doesn’t work, substitute another chain that runs quiet. If that doesn’t work , you have worn gears.
 

TieDye

I live for the CABE
Aug 24, 2015
1,080
Henderson, MI, United States
Soak it in oxalic acid, vinegar, or Kroil. Sometimes it takes a soak for a day or so in each one, and then maybe go back to vinegar. Rinse well after oxalic acid bath and vinegar soaks. The Kroil gets in the nooks and crannies and is a good way to finish it off. Wipe the excess off and put the chain on. On stubborn ones I've had, it may take 2 weeks and patience. If after that if links don't move freely, it's junk.
 

gkeep

Wore out three sets of tires already!
Jun 11, 2014
634
Alameda, CA
I've had good luck soaking a crusty stiff chain in 90 wt. gear oil. There is a thread here somewhere describing this, it sure pulls off the grime and rust.
Good luck.

Like RustJunkie said. meadure it to make sure it's not too worn and 'stretched'. A stretched chain will wear out the teeth of the cog.
 

Duchess

Wore out three sets of tires already!
Feb 14, 2014
575
Beverly, MA
After getting the rust cleaned off, automatic transmission fluid penetrates and lubricates well and you might even have some lying around. WD40 can help remove rust, but is not a very good lubricant, so almost anything else would do a better job when it comes to that.
 
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Hammerhead

Wore out three sets of tires already!
Oct 5, 2018
562
Franklin,NH
I had good luck with soaking in krud kutter,then washing in Safety Kleen parts washer at work. Then soaked in Mobil one oil overnight. Like in earlier replies if the cog or chain are damaged it will always make noise. Gl Hammerhead
 

TieDye

I live for the CABE
Aug 24, 2015
1,080
Henderson, MI, United States
To clean a chain, I use kerosene and a toothbrush.
 

Mr. Monkeyarms

Wore out three sets of tires already!
Oct 30, 2018
901
Colorado
All of these are good for cleaning a crusty chain to make usable. Measure from the center of one pin to 12 inches. Should be center of another chain pin. If the center of the pin is much past the 12 inch mark, the stretched chain isn't meshing properly with your gears.
 

49autocycledeluxe

I live for the CABE
May 29, 2017
1,303
59
fremont california
thanks for the replies. I'll have to get the bike out and shoot some pictures of the gears.

do these bikes actually get ridden enough to wear out the teeth on those steel gears??
 

Mr. Monkeyarms

Wore out three sets of tires already!
Oct 30, 2018
901
Colorado
They absolutely do wear out. I've seen chainrings and hub sprockets that the teeth look like shark fins.
 
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bobcycles

Riding a '38 Autocycle Deluxe
Sep 30, 2006
4,236
13
so cal beaches
I used to date this girl once who like to be tied up with....

yeah rusty ones. had to be rusty.
 
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