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Cracked block

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ron

09-21-1999 20:58:45




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i have a 17" L shaped crack in my 9n block.It only leaks a little.Will it hurt to run it and what are the chances of it cracking more?ANY IDEAS ON HOW TO REPAIR IT?




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Bruce

09-23-1999 13:29:25




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 Re: cracked block in reply to ron, 09-21-1999 20:58:45  

Like some of the other comments I also agree to use an epoxy sealant of some type. I had the same problem on a NAA and used JB Weld. The whole trick to it is clean, clean and reclean! If the surface has even a little oil or grease it wont work. One other thing I done to mine was after applying the epoxy, when it was starting to set up, I got some very light sand and blew onto the epoxy with a air hose, you may not care what it looks like but by doing this it matches the cast of the block and virtually undetectable.

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Glen

09-22-1999 08:24:48




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 Re: cracked block in reply to ron, 09-21-1999 20:58:45  
I had a little crack and let a so called welder do his thing, BIG MISTAKE!! and then I had spyder crackes on the side of the block. I used DEVCON PLASTIC STEEL PUTTY, WWW.DEVCON.COM AND K&W BLOCK SEALER WWW.KANDW.COM. still have a small leak but I`ll live with it for now.



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stuart

09-22-1999 11:53:14




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 Re: Re: cracked block in reply to Glen, 09-22-1999 08:24:48  
Don't laugh but I've used JB Weld available for less than four bucks at your local WalMart.



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bills(nh)

09-22-1999 05:04:31




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 Re: cracked block in reply to ron, 09-21-1999 20:58:45  
MY 8n block had a 24-36" crack that was soldered by someone. I added some powdered coolant sealant and it didn't leak. The block may continue to crack, but if it runs and dosen't overheat, don't play with it. Start lining up a clean block for the next rebuild.



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JerryU

09-22-1999 04:55:47




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 Re: cracked block in reply to ron, 09-21-1999 20:58:45  
My guess is the crack is on the left side by the freeze plug and drain cock. If it does not leak to the inside anywhere, my recommendation would be to use a combination of high temp silicone and JB Weld or Devcon after veeing out the crack with a grinder.

Blocks can and are welded, however, I had the same condition, and after spending an awful lot of time and expensive rod, we found out the whole side spidercracked, so it really leaked where once I only had a little drip. Block was scrap.

Unless you are absolutely sure of the welder and his/her skill, I would try to fix with epoxies and put up with a little drip if that is the only problem. If it has an internal crack, that is a different story.

My opinion.

JerryU

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