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Cracked block-9N

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Roy,Chaddsford

07-21-2000 18:10:03




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Seeking advice,Ihave a cracked block it is in a form of an (H) approximent 10 inches long, 2 horozonal lengths with a verticle aprox.3inches. It is pushed out a little in the center of the (H)Open for suggestions on how to Fix. I'm trying to save the block. The serial no. is 25---.Will grinding a "V" in the cracks and use JB Weld work? Or should I look for a welding specialist?Thank you in advance.Roy

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Salmoneye

07-22-2000 04:43:50




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 Re: Cracked block-9N in reply to Roy,Chaddsford , 07-21-2000 18:10:03  
Hi Roy!

Sorry to hear about your problem!
For large cast cracks, I have heard great things about the method described at the site below.
I have no personal knowledge or experience in this, but thought you might want to look at it anyway. It is called 'Stitching'. Hope this helps!

Paul II, In Vermont

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ZANE

07-21-2000 19:03:51




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 Re: Cracked block-9N in reply to Roy,Chaddsford , 07-21-2000 18:10:03  
I would vote against welding the block. It just don't weld good I don't care who or what you weld it with you are going to end up having to glue it to keep it from leaking so you may as well just glue it to begine with. If you have everything off the side you should use a good course grinder to remove all the paint and grease oil etc from the area of the cracks and maybe V it out a little right in the crack and then go get a few packs of JB weld or it's equivelent in some other brand such as 3M etc. and start glueing. If you can't find any prepairing chemical to preclean the area with you should buy a can of spray brake cleaner or electrical cleaner and waste it all on the job befor you apply the glue. (Epoxy).

ZANE

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dave#1

07-22-2000 07:24:41




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 Re: Re: Cracked block-9N in reply to ZANE, 07-21-2000 19:03:51  
It could be welded by someone who knows what there doing, I've welded cast iron engine blocks,heads,ect. for the last 17 years at the late model salvage yard where I work. Welding cast iron is tricky, if not done right, you'll end up with a worst mess than you started with ! I once gave advise and even the welding rod to a dear friend of mine, they welded a crack just like yours and the block cracked all to hell, they ended up scrapping the block, I can't say they did anything wrong, just that "Welding cast iron is tricky!"
To make a long story short, I agree with Zane, use JB weld !

later,dave

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9n'er

07-22-2000 02:39:45




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 Re: Re: Cracked block-9N in reply to ZANE, 07-21-2000 19:03:51  
Zane: question: Is JB weld that strong? (or the similar brands?) And, does gluing a longer crack with JB Weld hold better or about the same as a weld? I haven't used it before, so I am curious about it's potential and applications. ANother question: for cracks as large as Roy's here, is that what tells you to use the JB weld, and for smaller and minor cracks is a weld the best approach? I'm sorry to drag this post out with these questions but, would like to know what to do best when the problems surface. thanks Zane. 9N'er

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9n'er

07-21-2000 18:55:15




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 Re: Cracked block-9N in reply to Roy,Chaddsford , 07-21-2000 18:10:03  
Steve from U.S. Alloys is pretty knowledgeable about these kinds of repairs (check "tool talk" forum and post your need there). I recommend you do a search there and here...for Steve U.S. Alloys. I posted a similar question not long ago for a cracked block. 10" is fairly significant....mine was about 2.5" Anyways, welding cast iron requires skill. And if I may provide advice, I would seriously consider a professional welding job. It should come in at around 100.00 for it, but the cracks should be terminated by 1/4" holes drilled through on each end, v-grooved out, and then welded tight; peening the weld as you go, letting it cool to enable the weld to align with the colder cast iron surrounding it. If you have oil coming up through the crack, or oil staining (as I did) check into specific welding rod for oil contaminated cracks. Ask about it anyways. good luck.

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JimTN

07-24-2000 03:28:00




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 Re: Re: Cracked block-9N in reply to 9n'er, 07-21-2000 18:55:15  
I agree with the welding. I have fixed a many cracked blocks and even cast iron stoves with good cast iron elec welding rods, the machinable type. You have to have clean metal, go slow, and clean up as you go. You will find a good welder can do wonders.



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