We have a 2002 331 has 3000 hours on it starts right up, runs great but after about 15 to 20 min. It's starts smoking white oil smoke not billowing but you can smell it and see it at idle. Any ideas what it may be. Thanks Don
Do a leak down test, cylinder(s) might be washed out
You said you can smell it.. Fuel or coolant?? If coolant, take cap off radiator and look for bubbles while running.. shut off, let cool and look for oil ontop of coolant. Gonna have to know what fuel system, inorder to help w/ fuel smell..