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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Stuck subframe bolt.
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[QUOTE="MarkSims, post: 764132, member: 51091"] One of the 4 bolts connecting the subframe to the frame won't budge. The head takes an allen wrench and it's stripped out now. The bolt goes through a nut that is welded to the frame. I've drilled a hole through the bolt and tried an extractor bit but my 4 amp, 3/8" drill won't turn once the extractor bites and starts burning up. I tried a 9 amp, 1/2" drill but the chuck slips around the bit once it bites - no matter how tight I try to get the chuck. I've searched the posts and have a plan - but I'm not optimistic. Let me know if you have any suggestions! 1. The gas tank is removed. Drain the gear oil and lay the bike on its side - with the end of the bolt sticking through the nut pointing up. 2. Apply penetrating oil to the exposed threads of the bolt and to the lip of the nut. Apply heat to the head of the bolt to draw the oil between the nut and bolt. (Does that really work?) 3. Repeat step 2 several times over a couple of days. 4. Try the extractor again. There was also a lot of talk about using heat - but I wasn't clear on that. Should heat be used on the nut just prior to trying the extractor? Or is the idea to use heat and cooling cycles on the nut and bolt to get them to break their bond? Thanks! Mark [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Stuck subframe bolt.
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