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Discussion Forum

Manifold Nuts and Studs

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John IL

03-09-2003 14:49:42

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Would anyone have any tricks they'd like to share about removal of old rusty ones? I will be working on a 1940 WC. Any help will be appreciated. Thank you John Kauzlaric

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03-09-2003 18:04:07

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 Re: Manifold Nuts and Studs in reply to John IL, 03-09-2003 14:49:42  
A very cool way if you have a milling machine is to drill a hole as close to the center of the stud as you can, run an endmill down that is smaller than the threaded hole, say 1/4" or so, and carefully enlarge the hole with it until you just see the thread all around. It will look like a rust color line spiraling down into the hole. Now with a pick get the top of the "thread" started and pull it out with vice grips. Did this with several of mine. Made stainless studs to replace all of them too, and stainless nuts.

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03-09-2003 16:57:17

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 Re: Manifold Nuts and Studs in reply to John IL, 03-09-2003 14:49:42  
Check archives. Some can be removed by welding a nut on the broken stud, but usually more is needed. Heat the casting, not the bolt, with an ox/acet torch. Get the cast red hot- you want to expand that, not the bolt. As it cools, melt candle wax on the bolt so the wax flows between the threads. Some believe this helps, some don't. Unscrew with a vise grip, or weld the nut on and unscrew.

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David Maddux

03-09-2003 18:48:17

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 Re: Re: Manifold Nuts and Studs in reply to JMS/MN, 03-09-2003 16:57:17  
Someone on this site tought me about the candle wax trick about a year ago and I want you to know that it always works. I have found broken bolts that others have given up on with easy outs and with the candle wax and welding a washer on it there has not been one that I can't get out.

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03-10-2003 21:53:47

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 Re: Re: Re: Manifold Nuts and Studs in reply to David Maddux, 03-09-2003 18:48:17  
David- if you're Catholic, use a Blessed candle. If not, any birthday candle works just as well. If you're Catholic, you can cuss while trying to remove the bolt, and come out even, so you still go to heaven!

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David Maddux

03-11-2003 03:06:17

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 Re: Re: Re: Re: Manifold Nuts and Studs in reply to JMS/MN, 03-10-2003 21:53:47  
Well, I am not Catholic but I am sure glad to see that I have some options on that subject.

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Jim E

03-09-2003 16:38:36

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 Re: Manifold Nuts and Studs in reply to John IL, 03-09-2003 14:49:42  
I just replaced a broken stud about a month ago. I tried WD-40, Vise grips and a torch. The torch softened the stud (after I let it cool) so it sheared flush with the head. I had to drill and tap it. CAUTION-there is a water jacket directly behind the studs so drain the radiator/coolant before drilling. If you need the stud size/length let me know as I overbought. Off the top of my head it's 3/8 X 4 or 5 inches.

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03-09-2003 16:22:21

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 Re: Manifold Nuts and Studs in reply to John IL, 03-09-2003 14:49:42  

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