Thread: Sheared crankcase bolt
08-21-2010, 10:52 AM #1
Sheared crankcase bolt
Getting ready to put my Waverunner engine together this morning and was torque-ing up the crankcase bolts and sheared the 16th one. It's one of the closest ones to the flywheel.
It sheared with about 90% of the threaded portion still inside. So, my guess is that if I cracked the case again, there wouldn't be any of the bolt shaft sticking up from the hole that I could use to back the bolt out.
Can I move forward with this one bolt missing/sheared?
I'm guessing not because of the possibility of a leak, but since it is literally next to another bolt, maybe I'd be ok.
What are my options if I do need to get this removed from upper half of the crankcase?
08-21-2010, 02:39 PM #2
I decided to go ahead and crack the case again and get the bolt extracted. First attempt with a bolt extractor didn't go so well with the drill bit breaking off. Going to take it to a local dealer who said they can remove it.
08-21-2010, 08:15 PM #3
- Join Date
- Jul 2010
- St. Louis, MO
That's some bad luck man. I had a helluva time removing a sheared bolt from an old ski I had. I also broke an eazy-out off in the bolt. Not fun. Hope they can get it out for you.
08-21-2010, 09:26 PM #4
In general, if it has to do with the engine fix it with pride. It's not like it was one screw of two holding a bracket for a harness in place or similar.
08-26-2010, 03:37 PM #5
Well, received the upper section of the crankcase back yesterday. 3 hours of labor - they apparently broke a few drill bits as well. In the end they had to drill out the bolt and essentially added in a threaded sleeve. For the cost, I probably could have purchased a used crankcase. Next time I'll seek out a good local machine shop; I'm sure they could have done it for much less.
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