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View Poll Results: Cam cover bolt sheared should I... | |||
Drop engine | 0 | 0% | |
Buy more tools! | 1 | 50.00% | |
Torch it! | 1 | 50.00% | |
New idea I haven’t thought of | 0 | 0% | |
Multiple Choice Poll. Voters: 2. You may not vote on this poll |
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April 30th, 2019, 09:28 AM | #1 |
ninjette.org member
Name: Joe
Location: Lancaster CA
Join Date: Dec 2013 Motorcycle(s): 2007 Ninja 250 "sold" 2014 ninja 300 "Gold" 2000 DRZ400S (Sold the POS) K7 GSXR600 (Also POS...see a pattern? Posts: 207
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Cam shaft bolt sheared
Ok, so doing a valve adjustment an intake can bolt sheared while putting everything back together(I swear I was torquing to spec with a torque wrench!) I don’t have anything currently that’ll let me drilll it out while still in the frame, or drill won’t fit between the frame rails, any ideas or recommendations before I drop the engine?
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April 30th, 2019, 11:53 AM | #2 |
ninjette.org member
Name: Joe
Location: Lancaster CA
Join Date: Dec 2013 Motorcycle(s): 2007 Ninja 250 "sold" 2014 ninja 300 "Gold" 2000 DRZ400S (Sold the POS) K7 GSXR600 (Also POS...see a pattern? Posts: 207
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Looking at extension chucks now think I might try that route first for $10
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April 30th, 2019, 12:49 PM | #3 |
CCS Amateur #501
Name: Dave
Location: Iowa
Join Date: Jun 2015 Motorcycle(s): '09 250 SE 'Booger' Posts: 406
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My experience with screw extractors is nil, but id guess it would be easier to just remove the cyl head instead of the whole engine.
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April 30th, 2019, 01:34 PM | #4 |
Rev Limiter
Name: Jay
Location: WI
Join Date: Jul 2013 Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes Posts: A lot.
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If you can get a straight shot at it i would get a long drill extension, fresh bit, and easy-out, and give it a try before pulling the engine or head.
Even if there isn't a straight shot, you may be able to drill the proper hole with a flex extension on a drill. I would exhaust all possibilities, without damaging the head, before disassembly. |
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April 30th, 2019, 01:46 PM | #5 |
ninjette.org member
Name: Keith
Location: Gardner KS
Join Date: Oct 2014 Motorcycle(s): 2014 Ninja 300 Posts: 52
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If you can get a hold of a left handed drill bit and there aren’t any access issues I’d start there.
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April 30th, 2019, 01:52 PM | #6 |
ninjette.org member
Name: Keith
Location: Gardner KS
Join Date: Oct 2014 Motorcycle(s): 2014 Ninja 300 Posts: 52
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One more thing, stick a small screw driver or pick I the hole with the broken bolt and try to wiggle it. If the piece of bolt wiggle at all you can put the top/head piece of the bolt back in place and put a impact on it. If you push down pretty hard and run the impact in reverse it can drive the broke piece back out. I’ve had decent luck with this in the past.
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1 out of 1 members found this post helpful. |
April 30th, 2019, 11:00 PM | #7 |
ninjette.org member
Name: Joe
Location: Lancaster CA
Join Date: Dec 2013 Motorcycle(s): 2007 Ninja 250 "sold" 2014 ninja 300 "Gold" 2000 DRZ400S (Sold the POS) K7 GSXR600 (Also POS...see a pattern? Posts: 207
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Awesome ideas guys! This is why I came here first! Tomorrow morning I’ll try the bolt head and impact idea, if it doesn’t work I found some chuck extensions at. For reasonably cheap (it is a straight shot and I do have a left hand bit and extractor) and thanks a ton for the recommendation about only pulling the head, I hadn’t even thought of that, definitely saves some work if things go south
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May 1st, 2019, 10:09 AM | #8 |
ninjette.org member
Name: Joe
Location: Lancaster CA
Join Date: Dec 2013 Motorcycle(s): 2007 Ninja 250 "sold" 2014 ninja 300 "Gold" 2000 DRZ400S (Sold the POS) K7 GSXR600 (Also POS...see a pattern? Posts: 207
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It’s out! Life is all good again lol drilled it out just a hair and then was able to use the sheared top half of the boltto get the rest back out Thanks a ton for the help guys!
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May 1st, 2019, 12:22 PM | #9 |
Rev Limiter
Name: Jay
Location: WI
Join Date: Jul 2013 Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes Posts: A lot.
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Good tip by Kowalski!
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May 3rd, 2019, 07:33 PM | #10 |
Down Under
Name: Linkin
Location: Sydney, Australia
Join Date: Jun 2014 Motorcycle(s): Kawasaki ZXR250C Ninja Posts: 296
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Left hand drill bit half the diameter of the bolt usually works.
As an aside, when working on old bikes, sometimes a torque wrench isn't the best tool to use. Ironically, just using a ring spanner and finger tight FEEL of the bolt can tell you if the threads are going to pull out or if there is resistance when tightening. Had to helicoil far too many camshaft cap bolts because they'd been overtightened and pulled the alloy threads out of the head. Not fun. If I owned this bike, I would replace all the camshaft cap bolts as a precaution. |
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May 4th, 2019, 02:18 AM | #11 |
ninjette.org member
Name: Garry
Location: Bungendore Australia
Join Date: Jan 2019 Motorcycle(s): GPX250 1989 model and 1990 model Posts: 98
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The impact idea is a good one to try. If the broken off portion can’t be persuaded to come out it may be possible to get it to go further in. If you can get it to go in a few more threads you can then screw in a stud with some loctite to secure it as a replacement for the bolt. I have done this on a GPX250 and it worked fine. The bolts seem to be very soft on these bikes and you can almost feel them stretch as you torque then down. And as Linkin says above replace all the bolts and snug them down by hand rather than torque them.
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May 4th, 2019, 04:15 PM | #12 |
ninjette.org certified postwhore
Name: AKA JacRyann
Location: Mesa, AZ
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I can pull engine in less time than it takes for head removal. You also won't need to replace headgasket.
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May 4th, 2019, 05:19 PM | #13 | |
ninjette.org member
Name: Garry
Location: Bungendore Australia
Join Date: Jan 2019 Motorcycle(s): GPX250 1989 model and 1990 model Posts: 98
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Quote:
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Perpetua Culpa Alterna Vagus |
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May 4th, 2019, 10:13 PM | #14 | |
ninjette.org member
Name: Joe
Location: Lancaster CA
Join Date: Dec 2013 Motorcycle(s): 2007 Ninja 250 "sold" 2014 ninja 300 "Gold" 2000 DRZ400S (Sold the POS) K7 GSXR600 (Also POS...see a pattern? Posts: 207
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Quote:
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May 4th, 2019, 10:16 PM | #15 |
ninjette.org member
Name: Joe
Location: Lancaster CA
Join Date: Dec 2013 Motorcycle(s): 2007 Ninja 250 "sold" 2014 ninja 300 "Gold" 2000 DRZ400S (Sold the POS) K7 GSXR600 (Also POS...see a pattern? Posts: 207
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Hat other bolt did come close, that’s what tipped me off to the first bolt shearing, it had felt like it stretched so I moved to the next wine, felt that shear, then immediately backed out the first stretched one.
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May 4th, 2019, 10:17 PM | #16 |
ninjette.org member
Name: Joe
Location: Lancaster CA
Join Date: Dec 2013 Motorcycle(s): 2007 Ninja 250 "sold" 2014 ninja 300 "Gold" 2000 DRZ400S (Sold the POS) K7 GSXR600 (Also POS...see a pattern? Posts: 207
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Haven’t had to pulll an engine yet thankfully, was mostly just using that as a last resort if needed, this forum always had a few great ideas that work 😉
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1 out of 1 members found this post helpful. |
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