It is certain that the leakage of the chilled water passage of the engine block can be welded. However, attention must be paid to the repair of cracks in cast iron waterways. Ordinary welding materials and welding methods cannot be used casually for the sake of cheapness. This waterway can be welded by cast iron welding rod of WEWELDING 777, which is suitable for cold welding process. If there is no problem with the basic skills of welders, refer to WEWELDING 777 cast iron welding rod's operating specifications, and the cracks in waterways can be welded very safely.