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Old 12-06-2019, 10:37 AM   #41
katy
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Default Re: Cracked Block

Thanks for the pictures, looks good. Hope it works out for you.
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Old 12-06-2019, 12:07 PM   #42
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Default Re: Cracked Block

Quote:
Originally Posted by Werner View Post
Hallo und guten Tag,

just made some pictures to shows the external work. The pinkish-white discoloration are residues from the final crack-tightness test.

I am currently a little ill, therefore I'l show the next step, when the seam is cleaned.
Very interesting appearance. Looks pretty good! We are all hoping for the best. Get well.
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Old 12-06-2019, 12:58 PM   #43
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Default Re: Cracked Block

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Originally Posted by Werner View Post
Hallo und guten Tag,

just made some pictures to shows the external work. The pinkish-white discoloration are residues from the final crack-tightness test.

I am currently a little ill, therefore I'l show the next step, when the seam is cleaned.
Make sure you knock the weld spalls off the springs and clean everything really well.

Only real problem I ever had with cast was cooking the oils and contaminates out of the metal before striking an arc. Preheat it until a pine stick smokes on contact, Mig it hot and low feed and keep it hot with a torch or salamander while it cools.
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Old 12-06-2019, 01:27 PM   #44
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Default Re: Cracked Block

The welding of cast iron is not really any black art, welds pretty much like any steel. The secret is in the pre heat AND very slow post heat, or controlling the cool down of the area that was hot enough to weld together. Cools too fast it will crack next to the new weld every time.
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Old 12-07-2019, 04:23 AM   #45
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Default Re: Cracked Block

The beginning and end of the fracture was stop-drilled with 1/12" diameter of an inch deep into the water channel. The course of the fracture line was milled 1/4" deep and 1/3" wide a V-seam.

Then were 3 lines overlapping TIG seams welded filled. Every 1" of the length, the tensing forces were extracted with a compressed air needle gun.

It had welded in a special welding company. I do not know the working time, the bill was about $ 340,-.
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Old 12-07-2019, 09:32 PM   #46
tj donahoe
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Default Re: Cracked Block

I have had good luck with a good block sealer.about $35 lasts 3 years...
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Old 12-08-2019, 09:24 AM   #47
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Default Re: Cracked Block

Werner. First of all I would confirm this is where youíre leak is actually coming from . Best accomplished with a pressure test which means disassembly. Are you sure the leak isnít a head gasket failure? Which is showing up in the oil and valve chamber ?

The cost and time to fix that block probably isnít worth it in my opinion.
I would entertain a rebuilt short block which is least expensive route.
Guys have spent a lot of money fixing cracks and stitching and then still have a block that may be leaking or having issues and is always a problem can be.

Just my advise... I know your across the pond so not sure your availability there .
All the best
Larry shepard
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Old 12-08-2019, 05:58 PM   #48
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Default Re: Cracked Block

the bill was about $ 340.
Seems very reasonable and looks like a nice job. Will be interesting to hear after you've ran it for a while.
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Old 12-10-2019, 02:47 PM   #49
Werner
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Default Re: Cracked Block

Attached is a photo of the cleaned weld. It is easy to see that only short distances were welded.

Unfortunately, welding beads have jumped to the rioght valve spring. They can be abraded, but the risk of this spring breaking is now high.
Attached Images
File Type: jpg P1100485.jpg (84.4 KB, 43 views)
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