[skiwithcharlie]

So I just bought some blue loctite 242 to put on my Ellsworth Specialist rear dropouts bolts that keep on freaking loosening every ride. How much should I put on the rear dropout bolts, just a little bit or lot? Is it ok to let it dry only 2 hour or should I let it cure for the full recommended 24h before screwing them in. Also, where else should I use some? Ive got an intense M3, should I put a bit on the end of the shock mounting bolts or on the M3 rear dropouts bolts (they havent loosened yet but who know?). Is there a place where its better to put some on inside the bike threads rather than on the actual bolt threads. Where else do ya guys use loctite on a bike???

 

[Iridemtb]

Do not use locktite if you do not have to. I have truvativ cranks without a pinch bolt, and they kept comming loose. I put a little locktite (fairly light coating, but still visible) on the threads and into where the screw was going in.

Let it dry for the 24h if your using a lot. I let mine dry for 30 minutes, and then went trail riding, but just let it dry 24 hours so you don't have problems....

Make sure you only use blue locktite. Red locktite is EXTREMELY hard to get off. I think there is green and purple, and I'm pretty sure they are more weak.

Also make sure you do not put it on any parts that are supposed to move... Do not put it on if the part is not comming loose chronicly, it will just be more of a paint o take off it hink, and you will be wasting it. So only use it on what you need to. I carry it around in my tool bag when I go somewhere farther to ride.

So use it in moderation, use the correct kind, use only when needed, and use on the right spots. I am unsure of myself, but you might not want to use it on suspesnion pivot screws (I don't know if it will have a negative effect).

Best of luck, sorry to write a book, and sorry if I seemed like the back of a medicine bottle with the "do not's and everything else."

 

[freakrock]

when i need it to dry fast, i use a blowtorch. Do it carefully, because it burns out easily.

 

[skiwithcharlie]

when i need it to dry fast, i use a blowtorch. Do it carefully, because it burns out easily.

hey dude, your from Chile right? I was just there on a ski trip, Valle Nevado and Portillo. Great stuff. Any good lift assited mountain biking in Chile or you have to pedal up for all the good stuff? Where do ya ride at?

 

[freakrock]

valle nevado is the only place where you can SOMETIMES do lift assisted runs. the place isn't usually open for mountainbikers to go rip the tracks. it's a shame, but that's all we've got.
down here, courses are usually built on hills with antenas on top, so we can easily get to the top with our shuttle rigs.
The santiago area has lots of great courses on it's surroundings and it doesn't take more than 45min to get to most of them.
Since we are such a tiny country and have part of los andes, you can find courses all along the country, and almost every city has it's own (or many of them)

 

[RedOne]

How much should I put on the rear dropout bolts, just a little bit or lot? Is it ok to let it dry only 2 hour or should I let it cure for the full recommended 24h before screwing them in.

Just use a little bit. Degrease the threads.
After applying Loctite, screw the bolt in immediately, then wait minimum 1 hour, better the recommended 24 hours. (Exposed to air it won't dry.)
For blind holes, apply it to the internal threads instead of the screws'.

Loctite 242 Techdoc
http://65.213.72.112/tds5/docs/242-EN.PDF

 

[TheMontashu]

Make sure you only use blue locktite. Red locktite is EXTREMELY hard to get off. I think there is green and purple, and I'm pretty sure they are more weak.

green is the gnarlyest, it has to do witht the number NOT the color. I think the green is basicly a sleave retainer

 

[buildyourown]

There is a lot of misinformation in this thread.

First, loctite it only generally classified by color. Read the label before you use it. There are hundreds of loctite products for many different applications.

IN GENERAL:
purple: small fasteners (2-3mm)
blue: medium (5-6-8mm)
red: permanent - if you put this on a clean 4mm bolt, you will need to bake it out of the bolt will likely break.
green: strong and it fills gaps, use this for setting bearings and other things that should be a press fit but for some reason aren't


Don't use a blowtorch to speed up curing. The heat will destroy the locking capability.

Clean clean clean: If you put loctite on a greasy bolt in greasy hole it won't work at all. Clean all parts with loctite primer, acetone or rubbing alcohol. Apply loctite, assemble wet. You really only need to wait a few hours before riding.

 

[Kornphlake]

BYO is my Ridemonkey hero, do what he says.

 

[DirtyMike]

Actually you want the Purple, put it on AFTER you tighten the bolt, it penetrates down into the threads form there, and comes off when you want it to, the green IS a sleeve retainer, and will not work properly for threads, Blue is going to be a little too much hold for what your using it on, but if you use blue, one drop only on the threads, no more no less

 

[skiwithcharlie]

Actually you want the Purple, put it on AFTER you tighten the bolt, it penetrates down into the threads form there, and comes off when you want it to Blue is going to be a little too much hold for what your using it on, but if you use blue, one drop only on the threads, no more no less

I emailed Ellsworth about my rear dropout problem and they said it was ok to use the loctite 242(its the blue one) on the rear dropout bolts so they dont get loose anymore. Last time, they came loose in the middle of a gnarly trail and I could have seriously hurt myself for no good reason. I put the rear dropout bolts under so much stress/vibrations I think the blue medium strength loctite will do the job just fine or at least I hope so cause thats the one i bought..

Anybody ever used blue loctite 242 on a bike part and had a real hard time unscrewing it? So should I use purple or blue loctite on my rear dropout bolts? I never want to have to touch them ever again!

 

[peachy]

on your M3... use the blue on all the pivot bolts. 4 on the main upper link and 2 on the lower link. they are the ones that usually work themselves out. for the lower link, apply the loctite to the threads on the link and not on the long bolt. make sure to clean the threads w/ alcohol first. blue is all i use and they all come off w/o a problem.

 

[skiwithcharlie]

cool, blue it is then....

 

[buildyourown]

Actually you want the Purple, put it on AFTER you tighten the bolt, it penetrates down into the threads form there, and comes off when you want it to, the green IS a sleeve retainer, and will not work properly for threads, Blue is going to be a little too much hold for what your using it on, but if you use blue, one drop only on the threads, no more no less

Wow. Where did you come up with this?
You couldn't be more wrong.

 

[DirtyMike]

Wow. Where did you come up with this?
You couldn't be more wrong.

1st, i actually read. Thats how i have two Mechanical degree's

http://www.loctite.com/int_henkel/loctite_us/index.cfm?&pageid=19&layout=3

Linked it for ya, this is a greta product, its what alot of people use for wheels, seeing how it penetrates after you have set up and installed your parts, I recomended this one because he can install everything Dry, get an exact torque when installing, By the way bolts that are wet IE one with "Blue" loctite will not torque properly, would be why specs are given as "DRY TORQUE", then after installing you can add a drop and keep it from coming apart, while still being able to service his bike. By the way i have at least 30 different versions of Loctite in my tool box, if you would like to come over and learn how to use them all, come on over. I have the book to go with them all with exact instructions and applications.