We are trying to diagnose a problem on a 1987 Buick T-type with this turbo. The car is burning oil and we are not exactly sure where it is coming from. We currently have the turbo off the car and have noticed that there is some side to side play in the turbine side of the turbo. Does anyone know what is an acceptable amount of play? It is not enough for the wheel to hit the sides but it is enough that we are concerned. There is also some oil that has passed through the gasket connecting the center section to the exhaust side of the turbo. We think this is probably where the oil is coming from. Does anyone have any suggestions on what should be the next step in diagnosing our problem?