Engine Mechanical problem
2002 Lexus ES 300 6 cyl All Wheel Drive Automatic 80000 miles
My Lexus engine smokes when you start it. I have had the valve stem gaskets replaced as suggested by the dealership but it still smokes and uses oil. There are no leaks that can be found as it has been searched by two different dealerships. No leaks on the ground or anywhere else. Please Help.