How to fix a cracked block, easy also

Engine, Trans & Driveline

  1. Lefty71

    Lefty71 FBBO Gold Member FBBO Gold Member

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    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
     
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    • HALIFAXHOPS

      HALIFAXHOPS hops farmer and MOPAR only distributor rebuilder! FBBO Gold Member

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      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.
       
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      • 69Bee

        69Bee FBBO Gold Member FBBO Gold Member

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        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

        Cranky Banned Staff Member FBBO Gold Member

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        Where do you get the plugs?
         
      • vance.dykes

        vance.dykes Well-Known Member

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        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

        69Bee FBBO Gold Member FBBO Gold Member

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        • Fran Blacker

          Fran Blacker FBBO Gold Member FBBO Gold Member

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          Would it work on this?:rolleyes::rolleyes::rolleyes::rolleyes::rolleyes::eek::eek::eek::eek::eek: HEMI BLOCK.jpg
           
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          • 68Moparmaniac

            68Moparmaniac Well-Known Member

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          • threewood

            threewood FBBO Gold Member FBBO Gold Member

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

            Cranky Banned Staff Member FBBO Gold Member

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            Dang....overdrive the blower too much? :D
             
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            • Johnpat

              Johnpat Well-Known Member

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              Lock&stitch works,I've used it
               
            • Fran Blacker

              Fran Blacker FBBO Gold Member FBBO Gold Member

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              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.
               
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