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68mustang 
Bronze Level
Joined: 17 Jan 2020
Location: CT
Points: 96
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 Topic: Cracked engine block
Posted: 17 Jan 2020 at 11:15am |
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Allis chalmers 1939 wc bought tractor with engine block is welded , it runs perfect, it seaps coolant one area where it was welded, should I grind it down and try to re-weld, the weld looks very ugly.
Should I just look for another block assembly with crank ?
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LouSWPA
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Joined: 11 Sep 2009
Location: Clinton, Pa
Points: 24681
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Posted: 17 Jan 2020 at 11:36am |
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nothing ventured, nothing gained. the trick to welding cast is to use torches and preheat and then after welding slowly cool it down with torches, and/or wrap in old heavy blankets so it cools slowly
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I am still confident of this;
I will see the goodness of the Lord in the land of the living.
Wait for the Lord;
be strong and take heart and wait for the Lord. Ps 27
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Clay
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Joined: 11 Sep 2009
Location: Udall, Kansas
Points: 9678
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Posted: 17 Jan 2020 at 12:05pm |
If the block is now solid, clean and seal the weld with Belzona 1111 Super Metal. 1. Remove all traces of oil and antifreeze. 2. De-grease the surface with acetone or MEK. 3. Sweat the area with a torch. This will help bring the oils out of the pores of the metal. 4. Degrease. 5. V out the crack and roughen the surface. 6. Degrease. 7. Apply Belzona 1111 Super Metal to the area. 8. After the Belzona has cured, sand and paint.
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ac fleet
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Joined: 12 Jan 2014
Location: Arrowsmith, ILL
Points: 2324
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Posted: 17 Jan 2020 at 1:17pm |
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I put Aluma seal in one. Never leaked since. Had one with JB plastered on it, that didn't hole for long. Good cleaning before application is the key to anything holding.
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http://machinebuildersnetwork.com/
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Lonn
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Joined: 16 Sep 2009
Location: Назарово,Russia
Points: 29792
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Posted: 17 Jan 2020 at 1:24pm |
This guy doesn't know much about a WD but he seems to know his welding. Welding cast iron without preheating and no cracks.
[TUBE]Yopcz-IYDyQ[/TUBE]
Edited by Lonn - 17 Jan 2020 at 1:24pm
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-- --- .... .- -- -- .- -.. / .-- .- ... / .- / -- ..- .-. -.. . .-. .. -. --. / -.-. .... .. .-.. -.. / .-. .- .--. .. ... -
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I am a Russian Bot
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johnkc
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Joined: 22 Sep 2009
Location: KCMO
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Posted: 17 Jan 2020 at 3:03pm |
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yep! what Clay say's. there are many boat engines out there " fixed"{LOL] that way.
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I support the development of hybrid automobiles and alternative fuels as I need DIESEL fuel for my ALLIS CHALMERS!
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PDehring
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Joined: 06 Jun 2018
Location: Central MI
Points: 96
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Posted: 17 Jan 2020 at 6:03pm |
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X2 on Belzona, I fixed my M block with it and worked great. Not cheap though.
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1937 M Crawler, 1963 D21, 1964 D21, 1965 D12 SIII, 1970 220, 1976 185
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DiyDave
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Joined: 11 Sep 2009
Location: Gambrills, MD
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Posted: 17 Jan 2020 at 6:08pm |
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Where's the leak/welded area?
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Source: Babylon Bee. Sponsored by BRAWNDO, its got what you need!
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68mustang
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Location: CT
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Posted: 17 Jan 2020 at 8:05pm |
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the repair is right along the carb. and intake rubber hose , don’t know how to post pictures in this forum.
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DrAllis
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Posted: 17 Jan 2020 at 8:15pm |
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There have been many of those blocks successfully repaired by drilling 1/4" holes in the block on both sides of the crack and threading the 1/4" holes and mounting a 3/16" flat plate to the side of the block with a gasket and plenty of RTV or Permatex glue in-between. It adds strength to the cracked area and works better than welding. Looks bad ?? Well, how good does a bunch of weld look that seeps coolant all the time ??
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dawntreader74
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Joined: 28 Oct 2013
Location: Manteno
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Posted: 17 Jan 2020 at 9:42pm |
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DR; your wright on the patch' works very well' fixed one the same way' i put some JB; with a gasket' still never leaked been 10 years on WC.
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Dave(inMA)
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Joined: 12 Sep 2009
Location: Grafton, MA
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Posted: 17 Jan 2020 at 10:15pm |
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My C was declared dead by a PO after it threw a connecting rod through the carb side of the crankcase. Another fellow who happened to be a terrific farm mechanic made a patch using a piece of soft metal which he formed to the shape of the crankcase. He then drilled and tapped holes in the crankcase about every inch and bolted the patch & a gasket onto the side of the block. He ran that engine for years until I bought it from him. No welding required!
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WC, CA, D14, WD45
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GARY(OH/IN)
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Joined: 19 May 2010
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Posted: 18 Jan 2020 at 12:07am |
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I patched an Oliver 88 with JB and it never leaked again for the several years I owned it.
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cottonpatch
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Joined: 17 Nov 2010
Location: VIRGINIA
Points: 285
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Posted: 18 Jan 2020 at 12:56am |
 Clay wrote:
If the block is now solid, clean and seal the weld with Belzona 1111 Super Metal.1. Remove all traces of oil and antifreeze. 2. De-grease the surface with acetone or MEK. 3. Sweat the area with a torch. This will help bring the oils out of the pores of the metal. 4. Degrease. 5. V out the crack and roughen the surface. 6. Degrease. 7. Apply Belzona 1111 Super Metal to the area. 8. After the Belzona has cured, sand and paint. |
Belzona 1212 is a better fit as it’s oil tolerant so you don’t have to sweat it. Also available in smaller kits, and it’s one to one base to solidifier versus 3:1 for super metal. Both good products.
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'52 CA, '61 D10 II, ‘61 D15, '66 D15II, '63 D17D III, ‘69 170, '73 185 Crop Hustler, '79 185, '79 7000, '77 7040
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DiyDave
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Joined: 11 Sep 2009
Location: Gambrills, MD
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Posted: 18 Jan 2020 at 5:24am |
The metal patch idea works pretty good, for large holes, drilling, and tapping, too. I hadda jeep that I fixed with jb weld, crack was along the bottom of the water jacket, perilously close to the oil gallery. Its always a good idea to borrow or rent a magnaflux unit, to see how far the crack(s) go. Drill a hole, at the ends, tap and thread in a bolt, at all ends, to keep the crack from growing, taking care not to drill too deep, and into a moving part. 
Then there's this:
[TUBE]Pq0wfU4ZaKk[/TUBE]
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Source: Babylon Bee. Sponsored by BRAWNDO, its got what you need!
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Gerald J.
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Joined: 12 Sep 2009
Location: Hamilton Co, IA
Points: 5636
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Posted: 18 Jan 2020 at 9:33am |
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Nevada Cylinder Head shop on the west side of Nevada, Iowa welds blocks often. They also can straighten crank shaft bores.
Gerald J.
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