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My block cracked

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Old Dec 9, 2005 | 06:08 PM
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Default My block cracked

Can a block be repaired if it has a crack. It got cold here and I only had water in it. There is about a 3 inch crack in the block under the head on one side- the side I didn't let the water out of.
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Old Dec 9, 2005 | 06:09 PM
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Short answer: yes.
Long answer: unless it's something rare, don't bother. Get a new block...and run a 50/50 distilled water/antifreeze mix year round.
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Old Dec 9, 2005 | 06:13 PM
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Originally Posted by I'm Batman
Short answer: yes.
Long answer: unless it's something rare, don't bother. Get a new block...and run a 50/50 distilled water/antifreeze mix year round.
and it will probably have another crack somewhere you can't see....
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Old Dec 9, 2005 | 06:45 PM
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you need to pull the intake manifold and see how many cracks are in the oil valley.....On my cracked block there were three times as many cracks there as what was visible on the outside.
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Old Dec 9, 2005 | 07:02 PM
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it's junk..even if you inspect it you won't be able to see most of the cracking.
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Old Dec 9, 2005 | 07:06 PM
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Originally Posted by Twin_Turbo
it's junk..even if you inspect it you won't be able to see most of the cracking.
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Old Dec 9, 2005 | 07:10 PM
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Originally Posted by 79vetter
Can a block be repaired if it has a crack. It got cold here and I only had water in it. There is about a 3 inch crack in the block under the head on one side- the side I didn't let the water out of.
damn, it got that cold in Texas?
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Old Dec 9, 2005 | 07:15 PM
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I'm surprised it didn't pop one of the frost plugs first.
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Old Dec 9, 2005 | 07:30 PM
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Originally Posted by Maymyvetteliveforevr
I'm surprised it didn't pop one of the frost plugs first.
yeah really, isn't that what they're for?
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Old Dec 9, 2005 | 07:34 PM
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Originally Posted by chris75stingray
yeah really, isn't that what they're for?
NO. They are not actually frost plugs. The holes are required during the casting process in order to keep the sand cores for the water jacket located correctly. The plugs are merely there to keep water in the water jacket not pop when the block freezes.

Sorry about your luck but if its cracked in one place there will be more, find a new block. Remember to run antifreeze or store in a climate controlled garage.
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Old Dec 9, 2005 | 08:29 PM
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From: belle plaine ks
Default never water

Anti freeze should always be run in a 50/50 mix for keeping you from overheating as well in the summertime. The boiling point of water mixed with anti freeze is higher. Look at your antifreeze charts for the facts.
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Old Dec 9, 2005 | 10:46 PM
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How come the blocks always crack but the thin copper radiators don't?
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Old Dec 10, 2005 | 01:22 AM
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There is room in the top of a radiator for expansion. if you have air pockets in a block, you're asking for trouble - and I have seen frozen/broken radiators.
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Old Dec 10, 2005 | 02:12 AM
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Originally Posted by evalu8r
How come the blocks always crack but the thin copper radiators don't?
The copper will bend to expand, the cast iron just busts...
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Old Dec 10, 2005 | 02:37 AM
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freeze plugs...the word is misleading, a better name is core plug.

Last edited by Twin_Turbo; Dec 10, 2005 at 03:26 AM.
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Old Dec 10, 2005 | 07:56 AM
  #16  
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Originally Posted by Maymyvetteliveforevr
I'm surprised it didn't pop one of the frost plugs first.
That was my first thought...I'd junk it and get a new crate-er..you'll never find all the cracks if it's that bad..in New York we use "anti-freeze"...I know, quite the concept...UH?
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Old Dec 10, 2005 | 09:09 AM
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Originally Posted by I'm Batman
Short answer: yes.
Long answer: unless it's something rare, don't bother. Get a new block...and run a 50/50 distilled water/antifreeze mix year round.
you need to drive it now ????
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Old Dec 10, 2005 | 10:23 AM
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Just wondering how they ever got to be known as "freeze plugs", maybe bubba got lucky one winter and one pushed out when his block froze and he then named 'em freeze plugs,,, any thoughts? Peace,,,Moosie
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Old Dec 10, 2005 | 10:27 AM
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From: eville in
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Originally Posted by moosie982
Just wondering how they ever got to be known as "freeze plugs", maybe bubba got lucky one winter and one pushed out when his block froze and he then named 'em freeze plugs,,, any thoughts? Peace,,,Moosie
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Old Dec 10, 2005 | 03:30 PM
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From: WAY DEEP INSIDE AMERICO,YES YOU LIVE HERE TO!! TX
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WOW, thats gotta suck. I would just get another block.
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