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Sheared cylinder nut and broken cylinder


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Posted (edited)

I’m in a world of hurt right now. 
Torquing down the cylinder on a ‘79 dt175 last night and I sheared off the top of a cylinder nut in the process. I thought I’d just leave it as I was just about at the 27# as per clymer recommendation until this morning when I noticed a piece of the cylinder base on the garage floor. I’ve been working out but I mean come on, I’m not that strong lol. A now I can’t get the damn cylinder off (bolt or nut extractor??) and I’ve got to buy a beer cylinder as I’m going to guess they’re not going to reimburse me for this one. Yes I did crisscross my torquing every few pulls on the wrench. 
 

Has anyone ever done this?! Any recommendations on getting that nut out?!

https://drive.google.com/file/d/1USmBA3Y4QZoy6tfL1bbOGzSjmXQEvQIU/view?usp=drivesdk
 

https://drive.google.com/file/d/1USmBA3Y4QZoy6tfL1bbOGzSjmXQEvQIU/view?usp=drivesdk

Edited by Vinz
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Bugger! Can you heat it and move it with some water pump pliers. I really can't understand how the cylinder base broke like that unless there's a fragment of old gasket involved. If the cylinder is no use any longer and it looks that way, you may have to cut the fins away for better access?

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Wow"  its acted like a wedge ,  pushed thru the  cylinder base, 

 

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3 hours ago, Airhead said:

Bugger! Can you heat it and move it with some water pump pliers. I really can't understand how the cylinder base broke like that unless there's a fragment of old gasket involved. If the cylinder is no use any longer and it looks that way, you may have to cut the fins away for better access?

Thanks. I still can’t get that nut off so I’ll give that a try.

Unfortunately it seems that my torque wrench was lying to me. 
I tried getting the rest of the nuts on thinking maybe since I’d smashed the one on so tight that it would be sealed fine and ended up snapping one of the cylinder studs as well. All around nightmare over here haha. I’ll be happy if I can just get the cylinder off and start over. 

I spent a good amount of time cleaning off the old gasket so that wasn’t a problem

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Cylinder is off. Turns out I had torqued it down so much I squeezed the cylinder down into the threads of the bolts. 💪🏼😅🤦‍♂️
Needless to say this cylinder is shot. I had to rip some fins off to get to the nut so I could get it off. The fins came off surprisingly easy which I thought was weird. 
anyways, time for a new torque wrench. 

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15 hours ago, Airhead said:

My concern is, have you pulled the stud from out of the engine case?

Yeah I got it out no problem yesterday. New one is in the mail 🤙

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On 6/1/2021 at 10:03 AM, Vinz said:

Yeah I got it out no problem yesterday. New one is in the mail 🤙

Maybe I am confused? If you’re talking of the broken stud, yeah that’s out. There was enough of the top threads to get a nut on and locked to take it out. 

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I think he means have you stripped the threads out the hole your stud was screwed into

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