Moin Together, I took over an old Italjet Velocifero 50. I already had to deal with various problems like cable breaks, leaky tank, petrol tap etc. Unfortunately the scooter also did not run reasonably, which is why I suspected side air. I have now completely disassembled the engine on the table and new seals are ordered. When removing from the engine block I noticed a spot on the engine block which worries me. At the crankcase in the aluminium casting is a crack or material error The crankshaft sealing rings also looked old, so I can’t say whether air can come through the crack. Has someone had something like that? That looks like a production error, I would say. I would like to “flick” that somehow for safety. What is best for your experience? I have such “liquid weld” at home from such a granule and glue. Or motor sealant? Or there are also so 2K metal adhesives. r. A new engine block is not so easy to find on the one hand and on the other hand also somehow too expensive for the purpose. Other question: I saw in a video that the engine halves were sealed with sealant. Original was now a paper seal. Should I stay with the original or is the sealant the better modern solution? Or both together? Thank you in advance. LG Julian