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Tool Talk Discussion Forum

cracked block

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handcrank

02-01-2014 19:43:32
174.239.5.5



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What is the best thing on the market for fixing a cracked block?Have used JB weld with some succsess.Thank,s in advance, Don.




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algar

02-02-2014 14:49:19
74.47.87.75



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 Re: cracked block in reply to handcrank, 02-01-2014 19:43:32  
I agree with most of the others recommendations. But without more info? Resale value new used block.
low pressure side of block JB weld ,best locNstitch
tapping oins.



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RodInNS

02-02-2014 14:31:43
216.118.158.123



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 Re: cracked block in reply to handcrank, 02-01-2014 19:43:32  
It's like this.... if it's a common block, get another block. If you're trying to salvage some oddball relic and money is no object... there are places that specialise in repairing blocks, heads, etc.
In terms of DIY cold repair, Lock and Stitch is probably your best option.... but I wouldn't hold out any great degree of optimism that it will hold without leaking.
Fusion welding with cast filler is probably the best process to achieve a homogenous result... and that is a professional repair. For that you send it to an expert.

Rod

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welding man

02-02-2014 14:54:43
216.115.204.175



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 Re: cracked block in reply to RodInNS, 02-02-2014 14:31:43  
Rod I have repaired several blocks with Lock-N-Stitch and never had a leak or a come back., But it all depends where it is cracked and it's not cheap either.



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mmfan55

02-02-2014 13:27:56
98.93.244.154



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 Re: cracked block in reply to handcrank, 02-01-2014 19:43:32  
depending on where it is; what it is; etc..... It is possible in most cases to weld it. Have to have someone that knows the "tricks" to welding cast iron. I have had cast blocks; water manifolds, etc... welded with success. Even had a hole repaired in a chevy 292 from throwing a rod through it.



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Stick welding

02-02-2014 11:08:19
96.53.210.246



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 Re: cracked block in reply to handcrank, 02-01-2014 19:43:32  
The best? A new block.



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George Marsh

02-02-2014 10:54:59
50.121.7.90



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 Re: cracked block in reply to handcrank, 02-01-2014 19:43:32  
handcrank,
Every time I look at a tractor with a welded cracked block, I walk away.

Yes a block can be fixed. But it hurts the resale.

A totalled truck can be fixed. Then you get a salvage title. Try to trade the truck in and you find out the dealer doesn't want a salvage title.



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mike m

02-02-2014 10:07:50
184.20.169.244



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 Re: cracked block in reply to handcrank, 02-01-2014 19:43:32  
JB weld does not expand and contract like the block will and soon leaks after a good warm up. I always wondered about using a tube of the ureathane used to hold windshields in ?



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Ken-Pa

02-02-2014 09:03:07
75.179.43.159



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 Re: cracked block in reply to handcrank, 02-01-2014 19:43:32  
Check our a couple vidoes on YouTube as to how a machine does it by stitching . I found it very interesting. Type in "engine block repair" . God bless, Ken



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Randy Shoe

02-02-2014 06:41:02
70.208.19.212



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 Re: cracked block in reply to handcrank, 02-01-2014 19:43:32  
There is a product that I have been using for years similar to JB weld but is in a two part paste form not a liquid as is JB weld. It's called PC-7. I will adhere to anything as long as the surface is free of oil or corrosion, and after curing will not be affected by oil, gas, or pressure. My main use over the years has been to repair aluminum irrigation pipe that sometimes holds 90 lbs pressure. Most auto parts stores handle it or hardware stores. I would guarantee this will work for any external damage, and a cheap fix.

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Dick L

02-02-2014 05:53:21
50.51.156.222



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 Re: cracked block in reply to handcrank, 02-01-2014 19:43:32  
All depends on how you want it to look when your done. I bought a tractor with a steel plate screwed fast over a long crack that never leaked. I also bought a used car real cheap that had the crack plastered with bondo and it never leaked. Cold stitching is a good fix.



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showcrop

02-02-2014 05:33:50
75.67.231.80



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 Re: cracked block in reply to handcrank, 02-01-2014 19:43:32  
Google Lock'n Stitch it's the only way.



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Chuck (CA)

02-02-2014 09:30:43
70.211.69.14



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 Re: cracked block in reply to showcrop, 02-02-2014 05:33:50  
I highly agree.
They just got a huge contract with the government for repairing a dome on the nation's capital. I've used them with great success.



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old

02-01-2014 19:57:26
209.86.226.40



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 Re: cracked block in reply to handcrank, 02-01-2014 19:43:32  
Your question is way to open to be able to answer. Many things can into play on something like this. Where it is what engine it is etc etc etc



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jon f mn

02-02-2014 05:41:26
174.30.201.167



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 Re: cracked block in reply to old, 02-01-2014 19:57:26  
I agree with old, there are as many ways to fix one as there are ways to crack one. Pics and a good description of how it happened and what the block is from would be the only way to get good advice. Anything given with this much info is a guess at best. The lock/stitch deal looks good to me tho, but a lot of work.



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