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How do you fix this problem? Frame related(11 posts)

How do you fix this problem? Frame relatedtronracer
Apr 23, 2003 10:56 AM
The female nut that is inserted in the frame...the one that accepts the allen bolt for the water cages... spins inside the frame. So it is not the threads that are stripped. Can this be fixed or am I screwed? Seems like it can be removed and glued back in place...or not?
re: How do you fix this problem? Frame relatedRickC5
Apr 23, 2003 11:08 AM
I would try one of the thicker types of Super-Glues. I believe some are called "gap-filling".
Three OptionsGregory Taylor
Apr 23, 2003 11:13 AM
It sounds like the "rivnut" has come loose in the frame. A couple of options:

- Drill out the old rivnut, put in a new one. This is easy, but you have to have a pop-rivet tool, a drill, and a steady hand. If you don't know what a "rivnut" is, you probably shouldn't attempt this (it's a threaded collar that is attached to sheet metal or tubing with a pop rivet gun. Similar to a molly bolt.)

- Put a drop or two of superglue behind the "collar" on the rivnut and hope that it holds the rivnut in place.

- When you are tightening or loosening the water bottle cage, press the cage against the rivnut to trap the rivnut in place against the frame while you screw away. If you are installing cage bolts, don't tighten them down too hard. That's what probably caused the problem in the first place...
JB Weld. It will last longer than your frameDave Hickey
Apr 23, 2003 11:48 AM
You can buy it at any autoparts store. It's a two part epoxy.
JB Weld-- thread driftsoup
Apr 24, 2003 5:56 AM
Last summer I stripped two of the mounting nuts in one of my beloved Carnac Legends. Like tron's riv-nut, they would just spin and not allow the mounting screws to tighten down.

Realizing that only heroic (drastic) measures were going to save my shoes, I dremeled out the nuts, created fairly clean craters in the shoe bottom, and used JB Weld to remount the nuts. The only tricks were keeping the JB Weld off the threads and making sure everything lined up.

The stuff is awesome-- the Legends are still going strong. Btw, you can also find the stuff at your local home improvement store.

soup
I have a similar problem...PdxMark
Apr 23, 2003 12:45 PM
The rivnut doesn't spin, but it's loose. The water bottle cage wobbles. (It holds a Niterider battery.) So it sounds like I can use the same solutions to tighten-up the nut... including JB weld. It's a Cannondale frame, if that matters.
Mine does it too...Gregory Taylor
Apr 23, 2003 1:53 PM
I have a Cannondale, and the dang pop-riveted threads on the bottle cage are pain. They loosen up over time.

The JB Weld stuff is great. If you replace the rivnut, I would coat the replacement with the epoxy and then rivet it into the frame.
Mine does it too...curlybike
Apr 23, 2003 4:48 PM
I can replace those for you or tighten the ones that are there.
YO, go to the bike shopMr Good
Apr 24, 2003 4:22 AM
I had the same problem, went into a shop which sells Cannondales (not my regular shop) and said "Yo, you got one of them rivet guns for my bolt?" And the mechanic is like "Yo, no problem!" and yo, he fixed me up on the spot in 20 seconds for no charge. So guess where I'm going shopping next time I want to buy some bike stuff, yo.
YO, Nashbar? (nm)Crankist
Apr 24, 2003 6:33 AM
re: How do you fix this problem? Frame relatedMr Wolfe
Apr 24, 2003 8:42 AM
First, stop spinning the bolt! Your only going to make the problem worse. Sencond, I got to agree with Mr. Good. Go to the LBS and see what tools they have to offer. Save the JB Weld as your last option (and only as your last option). There is no recovery from the JB Weld and the potential for really screwing things up is high (I hope you have steady hands).

I just went through the same thing here in Atlanta for my carbon frame. I literally had to visit/call five shops before I found someone who knew what was going on (thanks Eric).

Whatever solution you go with be sure to grease your cage bolts every time you remove/install them. And be very careful not to over tighten them.

Best of luck.

Mr Wolfe