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Fairly big problem

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ffolkes

09-04-2004 15:22:40




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Hello-

Everything was going good on my BN restoration until I retorqued the head. That went ok, but when I tightened the rocker arm bolt, the stud snapped. From what I"ve read, this is the stud responsible for supplying oil to the rocker arm assembly.

I was able to nicely braze the two snapped pieces together, but I don"t know if that"s good enough. Will silver solder work alright? Or am I asking for more trouble by not getting a new stud, provided they are even available.

Thanks.

ffolkes

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Johan

09-04-2004 22:52:52




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 Re: Fairly big problem in reply to ffolkes, 09-04-2004 15:22:40  
You can easily make a new stud by sawing of a threaded piece of a bolt and drill it from the end and side so they meet.



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Jim Becker

09-04-2004 20:17:43




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 Re: Fairly big problem in reply to ffolkes, 09-04-2004 15:22:40  
I have a little problem imagining that stud repaired and still having an opening for the oil.

Remember, it has to be installed with the OPEN END into the head and the opening in the side has to be below the washer and nut.

Since it is hollow, it will not stand the same torque as a standard bolt of the same size. Go easy on it.



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JonB

09-04-2004 19:40:40




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 Re: Fairly big problem in reply to ffolkes, 09-04-2004 15:22:40  
I broke the same stud (with oil hole) when restoring my A. I was able to get one from Carter & Gruenewald



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ffolkes

09-04-2004 16:07:32




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 Re: Fairly big problem in reply to ffolkes, 09-04-2004 15:22:40  
I'll call the local IH/Case dealer Tuesday.

I put the stud back in, and it isn't going down into the head as far as it used to, therefore the broken portion is sticking out above the nut, so there really isn't even any pressure on the silver solder. I torqued it to 40 ft/lbs...50 is what snapped it originally.

Like I said, I'll gladly replace it if they still make that part, but if not, is there any danger in using this one? I think I can answer my own question...if the nut/stud tip snapped again, it could fall into one of the pushrod holes and damage the cam.

ffolkes

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ffolkes

09-04-2004 23:07:28




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 Re: Fairly big problem in reply to ffolkes, 09-04-2004 16:07:32  
It was my fault in that I misplaced my 5/8" open end wrench, so I just put a socket on what was in my hand...a 1/2" drive torque wrench.

Sadly, I didn't get that info anywhere. It just so happened that I had the torque wrench at 50 ft/lbs, and without thinking I pushed, racheted, and snapped it off. That's what I get for getting too caught up in the radio, and not paying enough attention to what I was doing.

I guess I was so used to applying a lot of pressure with an 8" 5/8 open end wrench, that without thinking I applied the same pressure to an 18" socket wrench.

It shouldn't be much of a problem to make a new one though. I don't know if it'd be better to wait until Tuesday and see if Case has it, or make it myself.

ffolkes

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lee

09-05-2004 08:42:24




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 Re: Fairly big problem in reply to ffolkes, 09-04-2004 23:07:28  
Don't shoemaker the job. Get the right part.



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K-Mo

09-04-2004 17:08:09




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 Fairly big problem in reply to ffolkes, 09-04-2004 16:07:32  
You may want to recheck your torque. Off the top of my head, I believe that's a 3/8" bolt and standard torque would be more like 35 ft/lbs.
If you get your torque values from the front of an IH manual make sure you use the ft/lb chart and not the newton/meter. The Newton/Meter is 45-50 for a 3/8" Grade 5. The ft/lb is 33-37.

K-Mo



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MagMan

09-04-2004 16:49:21




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 Re: Fairly big problem in reply to ffolkes, 09-04-2004 16:07:32  
Where in the world did you get info to torque the rocker to 50 Ft pounds. Wow you are asking for trouble I know on a SM and H its only like 30 or something. I can see why it broke I dont know what size bolt it is but I would just snug them if it was me. JON



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lee

09-04-2004 16:36:42




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 Re: Fairly big problem in reply to ffolkes, 09-04-2004 16:07:32  
why is it not in the head as before. make sure you get enough threads into the head, you'll be stripping the head and re-tapping that if not careful.



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Ron/PA

09-04-2004 15:44:10




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 Re: Fairly big problem in reply to ffolkes, 09-04-2004 15:22:40  
I seriously doubt that braize or silver solder would hold anything near the torque needed on that stud. I'd get a new one.
Ron



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lee

09-04-2004 15:40:47




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 Re: Fairly big problem in reply to ffolkes, 09-04-2004 15:22:40  
I would think you need another bolt, new or used. nnew or used



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