Hey guys and gals Im new here and looking for some assistance or reason being why I have this issue. Nine months ago I had a seized crank bearing replaced and the machine was well. A few months later the seal around crank behind the sprocket and chain started leaking so the mechanic tapped it back in and put some grey sealant stuff and it's worked fine till recently. The seal started leaking again so I had the mechanic replace the seal and it still leaks,why is this happening???