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WD40 Anti-Rust on BB threads

Old 03-08-22, 09:42 AM
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Anfieldtramp
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WD40 Anti-Rust on BB threads

Hi all,

While rust-proofing a new steel frame recently with WD40 Corrosion Inhibitor (basically a fancier type of WD40 that is supposed to help with preventing rust), I accidentally got some on the BB threads. I didn't notice this till it already dried. It is not a lot, but enough to be noticeable. Is this a bad thing? I saw a YouTube video where the mechanic cautioned against getting framesaver on the BB threads. And if it is a bad thing, how do I remove it? Do I try using regular WD40 and wiping with a cloth?
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Old 03-08-22, 10:14 AM
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There's quite a bit of discussion about this cheap penetrant, this one may be related to your concerns:

Might WD-40 hurt tires?

I would wash the whole bike with your fave bike soap, and then avoid using WD40 at all.

All rust inhibitors don't work if dirt is left there to keep things moist and mushy.

Regularly washing a bike and having it lazily drip-dry will be more effective.

Despite how crappy WD40 is, it will penetrate when left over long periods of time, and you don't want any of it to mix with any lube, especially in the BB.
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Old 03-08-22, 10:16 AM
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You could always ask a local shop to chase the BB threads. It only takes a few minutes and should be cheap.
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Old 03-08-22, 10:22 AM
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Originally Posted by Anfieldtramp View Post
Hi all,

While rust-proofing a new steel frame recently with WD40 Corrosion Inhibitor (basically a fancier type of WD40 that is supposed to help with preventing rust), I accidentally got some on the BB threads. I didn't notice this till it already dried. It is not a lot, but enough to be noticeable. Is this a bad thing? I saw a YouTube video where the mechanic cautioned against getting framesaver on the BB threads. And if it is a bad thing, how do I remove it? Do I try using regular WD40 and wiping with a cloth?
An old tooth brush and a little WD40 or mineral spirits will do what you want but I wouldn't even worry about it. It's probably just a little waxy oily residue.
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Old 03-08-22, 10:43 AM
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Originally Posted by soyabean View Post
There's quite a bit of discussion about this cheap penetrant, this one may be related to your concerns:

Might WD-40 hurt tires?

I would wash the whole bike with your fave bike soap, and then avoid using WD40 at all.

All rust inhibitors don't work if dirt is left there to keep things moist and mushy.

Regularly washing a bike and having it lazily drip-dry will be more effective.

Despite how crappy WD40 is, it will penetrate when left over long periods of time, and you don't want any of it to mix with any lube, especially in the BB.
I believe the OP is talking about internally rustproofing a steel frame and some ended up in the BB threads.

Wire or tooth brush and some mineral spirits rags and clean it out.
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Old 03-08-22, 11:10 AM
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Originally Posted by dedhed View Post
I believe the OP is talking about internally rustproofing a steel frame and some ended up in the BB threads.
Need the OP to provide more info, but that also sounds peculiar.
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Old 03-08-22, 11:17 AM
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Originally Posted by soyabean View Post
Need the OP to provide more info, but that also sounds peculiar.
Common really to rustproof a steel frame internally, in fact they make products specifically for that.
Once sprayed in you flip the frame around so it coats all surfaces and some runs out the main tubes into the BB shell.

https://problemsolversbike.com/files...er_INST_VF.pdf
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Old 03-08-22, 11:41 AM
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Originally Posted by Anfieldtramp View Post
Hi all,

While rust-proofing a new steel frame recently with WD40 Corrosion Inhibitor (basically a fancier type of WD40 that is supposed to help with preventing rust), I accidentally got some on the BB threads. I didn't notice this till it already dried. It is not a lot, but enough to be noticeable. Is this a bad thing? I saw a YouTube video where the mechanic cautioned against getting framesaver on the BB threads. And if it is a bad thing, how do I remove it? Do I try using regular WD40 and wiping with a cloth?
...I have treated many frames internally with Rustoleum corrosion inhibitor, which leaves an oily deposit on the interior surfaces. It usually gets on the threading of the BB shell. I have honestly never thought about it as problematic. The only conceivable thing it might do in that spot that would present a problem might be if it somehow interfered with the threading enough to inhibit cup and spindle installation. Which it never has, IME.

If the frame is Italian or French threaded, I usually install the fixed cup using Loctite, if it's an old school cup and cone loose bearing BB. For that to work, you need a cleans threaded surface. So for those, I clean it with acetone oor mineral spirits before installation. Unless it's something like that, I wouldn't worry much about it.
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Old 03-08-22, 01:55 PM
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Originally Posted by soyabean View Post
Need the OP to provide more info, but that also sounds peculiar.
not at all, very common to treat steel frames with rustproofer like J.P Wiegle ....
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Old 03-08-22, 08:43 PM
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Originally Posted by dedhed View Post
Common really to rustproof a steel frame internally, in fact they make products specifically for that.
Once sprayed in you flip the frame around so it coats all surfaces and some runs out the main tubes into the BB shell.

https://problemsolversbike.com/files...er_INST_VF.pdf
Yeap this was exactly what I was doing. FYI the frame is brand new, so no issue with dirt or anything. And itís bare as well, i.e no components installed.
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Old 03-08-22, 08:43 PM
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Originally Posted by FBOATSB View Post
An old tooth brush and a little WD40 or mineral spirits will do what you want but I wouldn't even worry about it. It's probably just a little waxy oily residue.
thanks for this! Will try this over the weekend
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Old 03-08-22, 11:42 PM
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Originally Posted by soyabean View Post
There's quite a bit of discussion about this cheap penetrant, this one may be related to your concerns:

Might WD-40 hurt tires?

I would wash the whole bike with your fave bike soap, and then avoid using WD40 at all.

Despite how crappy WD40 is, it will penetrate when left over long periods of time, and you don't want any of it to mix with any lube, especially in the BB.
There is a whole family of products under the WD-40 name; I think youíre confusing the rust inhibitor with th classic WD-40 product.
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Old 03-08-22, 11:47 PM
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I recently treated a frame with the WD-40 corrosion inhibitor, as I couldn’t get FrameSaver anywhere. The product seems similar to FrameSaver, if a bit thinner and much less noxious. It seemed to dry more quickly, as well.

After it set, I did clean out the BB/headset/seat tube before greasing and assembling, but I can’t imagine that product causing issues with the threads (particularly if you grease them).
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Old 03-09-22, 05:16 AM
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I build bicycle frames and they all get protected inside with Amsoil Heavy Duty Metal Protector, which is very similar to Frame Saver. The frames sit in the stand overnight to dry and he excess coating drips down and puddles in the bottom bracket. I just wipe the excess away with a rag and have never concerned myself with having it in the bottom bracket threads. Its just a wax coating and won't hurt anything. I can't even imagine what kind of harm someone could think it would do.
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Old 03-09-22, 09:03 AM
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Originally Posted by dsaul View Post
I build bicycle frames and they all get protected inside with Amsoil Heavy Duty Metal Protector, which is very similar to Frame Saver. The frames sit in the stand overnight to dry and he excess coating drips down and puddles in the bottom bracket. I just wipe the excess away with a rag and have never concerned myself with having it in the bottom bracket threads. Its just a wax coating and won't hurt anything. I can't even imagine what kind of harm someone could think it would do.
Can't imagine? Can't even imagine?? Well, it could --

It could...

It could keep the bottom bracket from corroding into the frame, so the next time you need to replace the bottom bracket, with that waxy stuff in the interface, it could take an hour or two instead of giving you six weeks without a usable bike. That would deprive you of a chance to go buy another bike!

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Old 03-09-22, 09:15 AM
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Originally Posted by pdlamb View Post
Can't imagine? Can't even imagine?? Well, it could --

It could...

It could keep the bottom bracket from corroding into the frame, so the next time you need to replace the bottom bracket, with that waxy stuff in the interface, it could take an hour or two instead of giving you six weeks without a usable bike. That would deprive you of a chance to go buy another bike!

So now you have no reason to give the missus for the N+1 bike 😢
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Old 03-09-22, 09:34 AM
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Originally Posted by Anfieldtramp View Post
So now you have no reason to give the missus for the N+1 bike 😢
Just curious.
I have never even held in my hands a brand new bare frame. Having the BB threads and shell faces chased with a proper BB alignment tool is an acceptable practice and just as important as dropout alignments. Has this been done on your frame?
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Old 03-09-22, 11:24 AM
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Originally Posted by Anfieldtramp View Post
thanks for this! Will try this over the weekend
Before I did the toothbrush treatment, I would just grease the threads and see if the BB cups go in easily. They probably will but if you encounter too much resistance, back them out and clean the threads. SImple.
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Old 03-09-22, 11:33 AM
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My less than scientific approach: I'd simply grease the threads with a generous amount of marine grease (the stuff from auto parts stores for boat trailer hubs), screw in the BB and forget about it. Can't imagine that unscrewing it is going to require much more force than going on even if it's 10 years or more.

Yes, if I had to fight to screw the cups in, I'd back them pout and re-think this but till then ...
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Old 03-09-22, 11:51 AM
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Originally Posted by 3alarmer View Post
...I have treated many frames internally with Rustoleum corrosion inhibitor, which leaves an oily deposit on the interior surfaces. It usually gets on the threading of the BB shell. I have honestly never thought about it as problematic. The only conceivable thing it might do in that spot that would present a problem might be if it somehow interfered with the threading enough to inhibit cup and spindle installation. Which it never has, IME.

If the frame is Italian or French threaded, I usually install the fixed cup using Loctite, if it's an old school cup and cone loose bearing BB. For that to work, you need a cleans threaded surface. So for those, I clean it with acetone oor mineral spirits before installation. Unless it's something like that, I wouldn't worry much about it.
For French threads, I used to grip the right cup in a bench vise and spin the frame. They make great, huge and powerful! wrenches. Does require good, square edges on the vise jaws. Mine now are way too beat up but I'ce stuck to English the past 40 years.
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Old 03-09-22, 09:33 PM
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Originally Posted by FBOATSB View Post
Just curious.
I have never even held in my hands a brand new bare frame. Having the BB threads and shell faces chased with a proper BB alignment tool is an acceptable practice and just as important as dropout alignments. Has this been done on your frame?
i intend to let my LBS do just that!
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Old 03-09-22, 10:41 PM
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Just wipe the threads with a rag before you grease them to install the bottom bracket.

You cannot possibly have hurt the bottom bracket threads, jeez. I hope all the ridiculous nonsense responses were jokes.
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