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cracked block


 
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handcrank
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Joined: 26 Mar 2013
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PostPosted: Sat Feb 01, 2014 7:43 pm    Post subject: cracked block Reply to specific post Reply with quote

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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old
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Joined: 12 Mar 2000
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Location: Lake of the Ozarks area of MO

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PostPosted: Sat Feb 01, 2014 7:57 pm    Post subject: Re: cracked block Reply to specific post Reply with quote

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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showcrop
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PostPosted: Sun Feb 02, 2014 5:33 am    Post subject: Re: cracked block Reply to specific post Reply with quote


Google Lock'n Stitch it's the only way.
 
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jon f mn
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Location: Pine City Mn

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PostPosted: Sun Feb 02, 2014 5:41 am    Post subject: Re: cracked block Reply to specific post Reply with quote

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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Dick L
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PostPosted: Sun Feb 02, 2014 5:53 am    Post subject: Re: cracked block Reply to specific post Reply with quote

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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Randy Shoe
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PostPosted: Sun Feb 02, 2014 6:41 am    Post subject: Re: cracked block Reply to specific post Reply with quote

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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Ken-Pa
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PostPosted: Sun Feb 02, 2014 9:03 am    Post subject: Re: cracked block Reply to specific post Reply with quote

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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Chuck (CA)
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PostPosted: Sun Feb 02, 2014 9:30 am    Post subject: Re: cracked block Reply to specific post Reply with quote

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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Mike M
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PostPosted: Sun Feb 02, 2014 10:07 am    Post subject: Re: cracked block Reply to specific post Reply with quote

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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George Marsh
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PostPosted: Sun Feb 02, 2014 10:54 am    Post subject: Re: cracked block Reply to specific post Reply with quote

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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Stick welding
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PostPosted: Sun Feb 02, 2014 11:08 am    Post subject: Re: cracked block Reply to specific post Reply with quote

The best? A new block.
 
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mmfan55
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PostPosted: Sun Feb 02, 2014 1:27 pm    Post subject: Re: cracked block Reply to specific post Reply with quote

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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RodinNS
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PostPosted: Sun Feb 02, 2014 2:31 pm    Post subject: Re: cracked block Reply to specific post Reply with quote

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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algar
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PostPosted: Sun Feb 02, 2014 2:49 pm    Post subject: Re: cracked block Reply to specific post Reply with quote

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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Welding man
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PostPosted: Sun Feb 02, 2014 2:54 pm    Post subject: Re: cracked block Reply to specific post Reply with quote

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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