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Old 01-26-2020, 07:26 PM   #1
David R.
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Default Engine disassembly; Uh Oh.

Beginning engine assessment this afternoon. Valve stems show no appreciable wear, .311 so far. Found one valve scored in seat area. Checked crank end play. Measured almost .015, about twice maximum tolerance.
Rod babbit looked fair but journals on crank had some pitting. Pistons .060 with #2 and #3 sleeved. Some scoring in cylinders. And......
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Old 01-26-2020, 07:34 PM   #2
Gary WA
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Default Re: Engine disassembly; Uh Oh.

oh my! may have to go for a rebuild!
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Old 01-26-2020, 08:56 PM   #3
larrys40
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Default Re: Engine disassembly; Uh Oh.

Look for a replacement block. That is a frost crack That Will probably come back to haunt you and in my opinion with as many blocks there are out there I would choose another and restamp to match your frame and title .
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Old 01-26-2020, 09:31 PM   #4
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Default Re: Engine disassembly; Uh Oh.

Where I am, a frozen block is unheard of but intuition tells me to vee out the crack and fill it with either a good silicone or an epoxy putty. Make sure the surfaces are clean.
The Model A cooling system is not pressurised so there is no pressure in the repair. I'd use silicone because it stays flexible and won't be bothered by any movement in the block caused by heating and cooling, minute as they would be.
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Old 01-26-2020, 09:53 PM   #5
SteveB31
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Default Re: Engine disassembly; Uh Oh.

The only permanent fix is to solder it.
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Old 01-26-2020, 10:52 PM   #6
john charlton
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Default Re: Engine disassembly; Uh Oh.

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This is a typical freeze crack it is unlikely to spread probably been like that for years . The crack most likely has self sealed by rust . I would not try to seal it with JB weld etc etc . V ing the crack out could cause more problems especially if the block is thin in that area . I have run cracks like this for years BARRS STOP LEAK is the way to go IMHO .As the block has been dry a while it might weep a bit to start with . "Nothing ventured nothing gained"

John in Newhall California a siopover en route to Chandler AZ from the Turlock swapmeet .
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Old 01-26-2020, 10:53 PM   #7
CWPASADENA
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Default Re: Engine disassembly; Uh Oh.

I have had good experience pinning a crack of this type.


I am not sure you can get things clean enough to solder it.


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Old 01-27-2020, 07:41 AM   #8
David R.
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Default Re: Engine disassembly; Uh Oh.

If it were a running engine in a vehicle I would venture going with it, but since It is disassembled and needing machine work I might try to find a better block before spending a lot of $$$ on this one. I wan't a dependable driver. It is an AA and I plan to work it some.
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Old 01-27-2020, 07:46 AM   #9
David R.
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Default Re: Engine disassembly; Uh Oh.

[QUOTE=john charlton;1845667]This is a typical freeze crack it is unlikely to spread probably been like that for years . The crack most likely has self sealed by rust .

I did find it odd that there was no sign of weeping or stains around the crack over the old silver paint on the block.
We used to use black pepper as stop leak, worked better than the commercial preparations, learned it from loggers in the mountains.
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Old 01-27-2020, 08:00 AM   #10
Jeff P. / MN
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Default Re: Engine disassembly; Uh Oh.

[QUOTE=David R. We used to use black pepper as stop leak, worked better than the commercial preparations, learned it from loggers in the mountains.[/QUOTE]

I have used black pepper in a Model T and it lasted several years and I sold it with full disclosure no problem.
I have also used soapstone to solve a slight freeze crack.
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