I just bought a Massey 255. It runs great and very strong, but there is white smoke coming from the breather tube after it runs for about 30 seconds. There is no smoke coming from the exhaust pipe at all. There is also what looks like an oil leak from the valve cover gasket. The top of the right side of the head has lots of residual oil on it. I just changed the oil which was very black and put on a new filter. From what I was told, the tractor hadn’t been run in months. Any suggestions on process of elimination? I haven’t taken the loader off yet to get a better look under the hood, but I’ll try that daunting task today.