If your engine block develops a crack, it is possible to weld it. However, experts recommend that if you have a crack in your engine block, you should choose a different method of repair, such as metal stitching, because deep cracks can buckle quickly and the welding repair is only a temporary fix. However, if you have no other option, then you can easily weld a crack as a short-term repair.
- Skill level:
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Things you need
- Welding torch
- Welder's apron
- Welder's gloves
- Welding mask
- Breeze blocks
- Clamps or vices
Evaluate the crack. If it's a complete crack, then you're much better off not welding it and using another method to repair the engine block or even just getting an entirely new engine block. If the engine block has a relatively shallow crack or if it has a hole or a divot, then welding would be a more appropriate solution.
Prepare the block for welding. Make sure that all components that could be damaged by the heat from the torch are out of the way and that the engine block is supported properly with breeze blocks. Use clamps or vices to force the two pieces together so that there is a definite seam for you to weld. Make sure that the damaged parts are squeezed together as much as possible before you begin.
Put on a welder's apron, welder's gloves and a welding mask. Turn on the torch. Move from one side of the damaged engine block to the other and make a careful seam that seals the crack or divot. Make sure that the parts being welded are flat and that gravity won't make the molten metal drip before it hardens again.
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