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Post by avenger619 on Mar 26, 2014 0:55:54 GMT -5
Hey guys,
I was swapping out my variator today and I think I may have stripped the spline, but I think I may be able to fix it any suggestions will help.
So while removing my nut with the impact gun I notice smoke coming out and the nut came off, well it seems like the aluminum of the nut melted between the spline threads. Am thinking maybe with a torch I could melt the aluminum between the threads off, would this be wise? or I have order a new nut and it should be here in a couple of days should I try to force it and re thread back in?
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Post by ramblinman on Mar 26, 2014 5:21:24 GMT -5
is it the first time you took that nut off? i wonder if someone used red thread locker. i don't know how else that nut could have left it's threads behind.  my only thought is to try picking it out (very carefully) but if red thread locker was used then i doubt that will work. i'd get some more advice before you do anything. |
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Post by tvnacman on Mar 26, 2014 6:15:06 GMT -5
Can we have a look at it ?
Removing the nut should not have an effect on the splines . If the threads on the nut or crankshaft are damaged thats different .
John
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Post by avenger619 on Mar 26, 2014 12:15:58 GMT -5
Well this was not the first time I had took the variator out, previously I had changed out the rollers. This time around looking at the nut I had a gut feeling that it was time to change it out because it just looked very warn out from the inside, I should have waited for the new nut to come in. Here are the pictures, hope it can help with suggestions, not to clear but you can see the inside of the old nut melted to the threads. The nut it self is wiped clean from the inside just smooth all around.   |
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Post by tvnacman on Mar 26, 2014 12:44:42 GMT -5
Thats not the splines its thr crankshaft threads .
You need to chase the threads . What size engine ?
john
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Post by JerryScript on Mar 26, 2014 12:53:48 GMT -5
Sometimes penetrating oil allowed to soak in, and a good steel nut will push the threads out, but you have to be very careful when starting it or you will strip the end of the threads off. Otherwise, you'll need a die of the appropriate size and follow the existing threads.
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Post by avenger619 on Mar 26, 2014 12:54:06 GMT -5
This is a 150cc, you mention "chase the threads", sorry a bit noob could you elaborate on this?
Revisiting: Ok so I was able to find this youtube video on chasing threads:
I guess I need a die tool, I believe the nut is a M12 so does this mean I need a die tool M12? confused.
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Post by tvnacman on Mar 26, 2014 19:25:27 GMT -5
I don't remember Off the top of my head . I need to measure and check pitch .
John
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Post by JerryScript on Mar 26, 2014 23:23:49 GMT -5
Before spending money on a die, try the penetrating oil and a steel nut. Takes five minutes, and could save you $20-$30.
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Post by avenger619 on Mar 26, 2014 23:33:49 GMT -5
Jerry I will give it a try, waiting on my new nut to come in from scrappydog , I will post my results when it comes in.
Thanks
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Post by tvnacman on Mar 27, 2014 14:10:17 GMT -5
You can ask around the auto shops if any of the guys have a metric tap and die set . I was able to get a guy to loan me a tap , it was summer . He held onto my $50 dollar bill , when I brought back the tap I asked if he had a fridge he said yes I gave him a case of water . I have since bought a set , he let me use his timing light and I bought one of thoes too .
John
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Post by avenger619 on Mar 27, 2014 15:04:15 GMT -5
I will try forcing the nut first like you suggested Jerry. but I checked with my local Autozone parts, and it looks like they have this set as a loner tool deposit about $  bucks which I would get back, sweet!! but my question now is does anyone know the die measurement I should use? or is there a way to figure it out with tool set in hand? I think I read some were that it was M12 1.25, can anyone confirm this? |
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Post by JerryScript on Mar 27, 2014 23:24:46 GMT -5
I believe it's M6 with a 1 thread pitch, but I'm not certain. If the loaner set you get has taps, you can use one of them inside the nut to determine the right die to use.
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Post by geh3333 on Mar 28, 2014 1:52:15 GMT -5
I'm gonna guess and say u probably stripped the threads the last time u put the nut on with the impact.
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Post by avenger619 on Mar 28, 2014 13:59:04 GMT -5
I just received my screw nuts today, yaaay. Jerry, good call on testing out the taps on the nut to determine measurement!  Team work makes the dream work.  Going to try this out will post results soon. Thanks everyone for feedback. |
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bucks which I would get back, sweet!!