How to fix a cracked block, easy also

[HALIFAXHOPS]

Man I wish I knew about stich weld I threw a bunch of big $$$ motors out, easy also just takes a few hours.
Drill the ends of the cracks first, drill and taper for the tap, special. put them the first set in and grind flush then drill in between and insert new plugs. Put the next set in so they meet the first plugs. Wow works great

 

[Lefty71]

I'm all for saving something that should be saved. Also, i've not had to try any of this, so knock on wood!! But, I have trouble believing that anything that adds stress like a pipe taper plug can be a permanent cure for something that cracked under stress. Granted the previous stress is gone, assuming these are ice cracked blocks you are working on. But would'nt the block still need baked to stress relieve and then re-machine literally everything to be usable again?? I see the hyperlink to FABO.... I'll head over for more reading on this subject. TIA, Lefty71

 

[HALIFAXHOPS]

Look u lock and stitch. way better explanation. The plugs are special kind of like a upward thread and it pulls it together. I know hard to explain.

 

[69Bee]

Look u lock and stitch. way better explanation. The plugs are special kind of like a upward thread and it pulls it together. I know hard to explain.

This is the method I use to repair cracks. The longest crack so far is a 17" one in a '54 GM 235 block.

 

[Cranky]

Where do you get the plugs?

 

[vance.dykes]

i had a 440 block crack due to freeze . had the block pined. look like small nails made of soft mettle and an epoxy never leaked. ran for 5-7 years sold the engine and the new owner never had a problem.

 

[69Bee]

Where do you get the plugs?

Me? I get my "Lock-n-Stitch" supplies from the same name.

http://www.locknstitch.com/index.html

 

[Fran Blacker]

Would it work on this?

 

[68Moparmaniac]

Would it work on this? View attachment 895274

 

[threewood]

I've watched videos on lock n stitch crack repair and it has to be some sort of black magic wizardry.

 

[Cranky]

Would it work on this? View attachment 895274

Dang....overdrive the blower too much?

 

[Johnpat]

Lock&stitch works,I've used it

 

[Fran Blacker]

Dang....overdrive the blower too much?

Careless second owner! Had some parts stolen so took to a garage he was friends with. They pulled the engine put it and the car outside in back. He threw plastic sheet over it. After a couple of years plastic gone two cylinders full of water froze. When went to buy the car agreed to pay him $800 for the car and engine but had to check out the engine. Knocked price down to $500 and a friend offered a complete Hemi for $1,000. This was in 1978.