Metal stitching is a proven cold repair technique used worldwide for cast iron engine block repair, effectively fixing cracks without welding. This process involves inserting metal alloy "locks" or "keys" across the fracture, restoring strength without introducing thermal stress. Metal stitching is especially beneficial for engine block repair, allowing in-situ restoration, minimizing... https://turbineshaft.in/blog/2019/10/08/metal-lock-metal-stitching-metal-stitching-cast-iron-crack-repair/