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stripped crank bolt
- jonarmstrong
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24 May 2015 08:40 #673478
by jonarmstrong
82 Kz1000 gpz1100 cams dyna ignition kerker k&n
stripped crank bolt was created by jonarmstrong
I've got an extra set of cases that have been under my work bench for a while. I was thinking about using them for a build. the other day I was looking at them and found a crank bolt hole stripped. its the outter rear hole on the right side. it's so stripped I can almost turn it through w my fingers. seems like a terrible place for a thread repair unless I just go with an oversized bolt. I could just get a another set of cases. anyone faced a stripped crank bolt before?
82 Kz1000 gpz1100 cams dyna ignition kerker k&n
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- SWest
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- 10 22 2014
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24 May 2015 08:46 #673480
by SWest
Replied by SWest on topic stripped crank bolt
Got a pic? could have it filled and rethreaded.
Steve
Steve
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- jonarmstrong
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24 May 2015 08:59 #673482
by jonarmstrong
82 Kz1000 gpz1100 cams dyna ignition kerker k&n
Replied by jonarmstrong on topic stripped crank bolt
no pics right now. we are at the beach this weekend. can post some tomorrow when I get home. fill with what? I had a cam cap bolt stripped before and I went with a 1/4 sae because it was the smallest oversize drilling I could do. it left me with the option of timesert or helical if 1/4 didn't work
82 Kz1000 gpz1100 cams dyna ignition kerker k&n
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- SWest
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24 May 2015 09:21 #673485
by SWest
Replied by SWest on topic stripped crank bolt
There's not much meat there and you're talking about some heavy strain. I would take it to some who can fill it by welding. Drill and tap it.
Steve
Steve
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- Tyrell Corp
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24 May 2015 09:59 #673491
by Tyrell Corp
1980 Gpz550 D1, 1981 GPz550 D1. 1982 GPz750R1. 1983 z1000R R2. all four aces
Replied by Tyrell Corp on topic stripped crank bolt
Doh! what an awful place to find a stripped thread. Timesert or helicoils have worked for me in the past but this is a very highly stressed area -although timeserts are stronger than the original IIRC. The other thing being there isn't a lot of 'meat' around the crank bolt area so drilling out for a timesert has disadvantages. Weld and retap sounds good but I'd be concerned about possible heat distortion so get a pro on it.
1980 Gpz550 D1, 1981 GPz550 D1. 1982 GPz750R1. 1983 z1000R R2. all four aces
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- SWest
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24 May 2015 10:07 #673495
by SWest
Replied by SWest on topic stripped crank bolt
Yup and the weld will be more dense than the surrounding material. Drilling and tapping should be done by a pro.
Steve
Steve
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