Re: Cracked Block!
[Re: 6bblFLASH]
#1525075
10/29/13 03:48 AM
10/29/13 03:48 AM
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Joined: Apr 2013
Posts: 345 Nebraska
451Cuda
enthusiast
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enthusiast
Joined: Apr 2013
Posts: 345
Nebraska
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Quote:
Quote:
I've ran several different 440 wedges, 426 Hemi and 400 with Elephant ears on the front with no midplate and a stock type trans. mount,they never cracked anywhere I've never had, seen or heard of a stock block crack like yours that wasn't frozen first
I thought the same thing,that vertical crack in particular. I have only seen vertical cracks from frost. I suppose the filler has absorbed water and/or is porus enough the expand on its own when frozen
Possible the filler wasn't tamped during the pour, and had air voids?
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Re: Cracked Block!
[Re: 1967Valiant]
#1525077
10/29/13 05:31 AM
10/29/13 05:31 AM
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Joined: Dec 2006
Posts: 3,667 Arizona
Chris'sBarracuda
master
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master
Joined: Dec 2006
Posts: 3,667
Arizona
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I'm thinking it's a 47 year old block that has a history that you don't know a thing about. Then you pound on them with 600+ hp.. Just thinking out loud here.. Old Old blocks.. But, yes a 70's 400 block would be much better.. I've seen them take a beating and keep on ticking.. Chris..
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Re: Cracked Block!
[Re: viperblue72]
#1525079
10/29/13 07:22 AM
10/29/13 07:22 AM
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Joined: Mar 2006
Posts: 9,883 MI, usa
dvw
master
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master
Joined: Mar 2006
Posts: 9,883
MI, usa
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Quote:
I have seen a small block crack right there, and it was from a front impact with a ditch. Maybe this block was in a car that had been in a collision in the past, altough I would think a sonic check would have caught it.
I've seen the them,frozen,w/o block filler. Now I can say when we knocked the inside water jacket out of a Hemi from a broken rod. I covered it with bondo, filled with hardblock and Moroso Ceramic seal. Ran it for 2 years. 2nd Hemi block numerous cracks in the side, and Moroso Ceramic seal, never leaked. 440 block cracked between the freeze plugs, Moroso Ceramic seal, never leaked. Just my experience. Doug
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Re: Cracked Block!
[Re: jamesc]
#1525081
10/29/13 11:32 AM
10/29/13 11:32 AM
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Joined: Mar 2008
Posts: 5,746 Ontario, Canada
Dodgem
master
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master
Joined: Mar 2008
Posts: 5,746
Ontario, Canada
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Quote:
i'm guessing this it mounted with a motor plate so the crack near the mount can't be from stress.
is this engine left with water in it in freezing weather? just because it's filled doesn't mean water can't get around the fill and cause problems especially if the fill wasn't done carefully. those cracks look like they're from ice not HP.
even though i carefully filled mine and drilled drain holes at the level of the fill i still put antifreeze in it during the winter and circulate it for a while.
i just don't see those cracks coming from HP unless something weird is going on.
I've seen that crack down the frost plug lines before. It's more common than one would think stating with older b and RB engines. One of the reasons they put a stiffening rib down the sides of the blocks in late 1968 and 1969 and up models.
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Re: Cracked Block!
[Re: 6bblFLASH]
#1525083
10/29/13 08:05 PM
10/29/13 08:05 PM
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Joined: Apr 2007
Posts: 1,165 Central Ohio, USA
Bigbeep
OP
super stock
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OP
super stock
Joined: Apr 2007
Posts: 1,165
Central Ohio, USA
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Quote:
Quote:
I've ran several different 440 wedges, 426 Hemi and 400 with Elephant ears on the front with no midplate and a stock type trans. mount,they never cracked anywhere I've never had, seen or heard of a stock block crack like yours that wasn't frozen first
I thought the same thing,that vertical crack in particular. I have only seen vertical cracks from frost. I suppose the filler has absorbed water and/or is porus enough the expand on its own when frozen
It hasn't froze since I assembled it in 2011. Beep
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Re: Cracked Block!
[Re: Bigbeep]
#1525084
10/29/13 08:14 PM
10/29/13 08:14 PM
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Joined: Feb 2005
Posts: 20,203 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,203
PA.
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That is an easy fix with today's nickle rod.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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