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Tractor Talk Discussion Forum

Block Repair

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Eric Hosette

04-13-2007 10:22:23




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What's the best way to fix a cracked block? It looks like someone tried to fix it once but it leaks still. It's a pretty long crack.




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BLW

04-16-2007 08:03:46




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 Re: Block Repair in reply to Eric Hosette, 04-13-2007 10:22:23  
I don't know what you have but if it is a farmall A for instance-- the crack on the out side of the block can be fixed with JB weld grind it down shiny (don't grind through the block) and put JB weld on it, it will last it seems forever since there is no preasure anyway-- I have had one lasted for 15 years and if necessary you can do it over later if it starts leaking



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gene bender

04-14-2007 04:28:31




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 Re: Block Repair in reply to Eric Hosette, 04-13-2007 10:22:23  
The famous crack on the A-B blocks behind the carb. I have two that i fixed with rubber cement that they use when replacing windshields. I has held for several years as there is no pressure. Depends on where the crack is located have seen even a fiberglass treatment work.



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HENRY E NC

04-13-2007 20:59:35




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 Re: Block Repair in reply to Eric Hosette, 04-13-2007 10:22:23  
Take it to a welder that does nickel welding. Be like new again



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Eric Hosette

04-14-2007 04:07:34




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 Re: Block Repair in reply to HENRY E NC, 04-13-2007 20:59:35  
Thanks everyone for your help. It"s a 1930 22-36 McCormick that i"m working on. Just pulled the engine yesterday. I"ll see what I can come up with for a fix.



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Jbruce

04-13-2007 18:51:40




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 Re: Block Repair in reply to Eric Hosette, 04-13-2007 10:22:23  
pins work well. if it is on a reasonably smooth section have fixed several with a strip of sheet metal and a cork gasket. bore holes around edge of sheet metal and bore and tap threads in block. cheapest fix where it can be used.



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TomTX

04-13-2007 17:36:34




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 Re: Block Repair in reply to Eric Hosette, 04-13-2007 10:22:23  
Don't use "waterglass" on it. I ruined an engine with it. It will sometimes block passages and cause overheating, and eventual engine failure. "Snake oil" fixes wind up being more expensive than fixing things right.
Tom



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rrlund

04-13-2007 16:13:25




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 Re: Block Repair in reply to Eric Hosette, 04-13-2007 10:22:23  
Are you trying to fix it structurally or just stop the leak? If you're happy with the fix that it has,plug the leak with waterglass.



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Mike M

04-13-2007 11:09:46




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 Re: Block Repair in reply to Eric Hosette, 04-13-2007 10:22:23  
You asked for the "best way" and that is to find another good block. A good welder may or may not be able to fix it depending on where all the cracks go and if it has to hold back antifreeze or oil or keep the two from mixing which can be very tough.



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big red fred

04-13-2007 10:51:58




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 Re: Block Repair in reply to Eric Hosette, 04-13-2007 10:22:23  
My old farmall M has a horizontal crack about 4 inches long on the outside of the block at the bottom of the water jacket . ground it clean drilled a small hole at each end of crack heated with aheat lamp for 6 hours then heated with torch to a straw color then torch brazed it with agood flux coated brazing rod put heat lamp back on it slowly cooling it that was in1993 and it still is not leaking maybe I was just luckey

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Princeton Bill

04-13-2007 10:50:21




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 Re: Block Repair in reply to Eric Hosette, 04-13-2007 10:22:23  
Lock N Stitch. Go to www.locknstitch.com. you drill holes, tap them and plug them. You drill out part of the previous plug down the length of the crack.

It works great. We did it to a block that had a crack that had been ground out and welded on . It is fairly easy to do and you can do it with the engine in the tractor (provided you have access to the crack.

I know there are other methods that work, but our attempt at welding wsa a disaster and JB WELD did not hold.

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old

04-13-2007 10:49:05




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 Re: Block Repair in reply to Eric Hosette, 04-13-2007 10:22:23  
The other 2 guys are right. But any case it does help if you tell us what your working on since some can be fixed easier then others and some are prone to crack and others aren't as prone to cracking and that can make a differance as to how to go about fixing them



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glennster

04-13-2007 10:35:30




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 Re: Block Repair in reply to Eric Hosette, 04-13-2007 10:22:23  
best bet is to take the block to a machine shop-engine builder and let em look at it. if its not in a critical area, they can weld it. we have a welding service in our area that does automotive engine and trans case repairs in the vehicle. they repair cracks and broken mounts from collision repairs. they are mobile and come right to you. cost usually runs 200-300 dollars for the repair.



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Gary from Muleshoe

04-13-2007 10:35:27




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 Re: Block Repair in reply to Eric Hosette, 04-13-2007 10:22:23  
Find you a good Welding Shop that is good at welding cast iron or find you another block. Nothing else will hold on a block because of heat and pressure build up. Lots of blocks have been welded that are still holding after years of use.



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