Crack on the back of the block

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Jun 18, 2015 | 09:29 PM

96Formula6spd

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From: Greenville,SC

Crack on the back of the block

So piecing together my junkyard 383. Anyways I found two micro cracks on the back of the block. Here are some pictures.

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Anyways, any ideas. Few welding shops are around have quoted around $100. However to do cast iron they need to heat it up. My engine is already together. Any ideas? Should I just bite the bullet and have it done. Jb Weld? Hopefully these can be fixed.

Jun 19, 2015 | 02:20 PM

superspirit

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If it were me I'd find another block and start over, cost a little more but worth it.

Jun 19, 2015 | 07:29 PM

Shownomercy

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Run it, worst case your trans falls out.

Could run a motor and mid plate.

Jun 19, 2015 | 08:04 PM

waltsfastz

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From: Rowletts,KY

Since it is not near any galleys i would drill a small hole at the end of the cracks. This should keep cast from cracking any further.

Jun 20, 2015 | 12:01 AM

94FBIRD

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From: Highlands Ranch, CO

Quote:

Originally Posted by waltsfastz

Since it is not near any galleys i would drill a small hole at the end of the cracks. This should keep cast from cracking any further.

Same here.

Jun 20, 2015 | 10:24 AM

ACE1252

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From: Kernersville, NC

Quote:

Originally Posted by waltsfastz

Since it is not near any galleys i would drill a small hole at the end of the cracks. This should keep cast from cracking any further.

Ditto this.

I don't think they need pinning, but it reminded me the first time I saw MachinistOne pin a crack. Was rather impressive to see how the crack was repaired. Here is one being repaired. I think the process can vary depending on where the crack is, but still impressive.

Last edited by ACE1252; Jun 20, 2015 at 10:48 AM.

Jun 20, 2015 | 02:06 PM

leadfoot4

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From: Webster, NY

Quote:

Originally Posted by Shownomercy

Run it, worst case your trans falls out.

Could run a motor and mid plate.

But isn't that in the area that the starter bolts up?? Could be a stressed area...

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Jun 21, 2015 | 07:24 AM

leadfoot4

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From: Webster, NY

Quote:

Originally Posted by 96Formula6spd

Ended up finding a cast iron welding shop. They were able to weld it up. Guy has done many engine blocks and cast iron transmission cases. No returns yet so hopefully $40 well spent.

Good Luck, hope it holds up for you!

Jun 21, 2015 | 11:47 AM

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superspirit

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Best of luck to you.

Jun 22, 2015 | 01:15 PM

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SoxXpupPeT

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From: Yonkers, NY

Quote:

Originally Posted by 96Formula6spd

Ended up finding a cast iron welding shop. They were able to weld it up. Guy has done many engine blocks and cast iron transmission cases. No returns yet so hopefully $40 well spent.

What process did he use? We spray weld cast iron at my shop. Aslong as he did all of the prereqs for it, it should hold up just fine. Goodluck either way OP.