I'm not sure, but I think a seal on my turbo is going bad. It's a turbonetics t3/t4. Everynow and again, when I stop at a light, or get off the highway, I'll get a cloud of smoke out the exhaust, then it goes away. At first I thought it may also be valve seals, but I just swapped out the motor and it's still doing it. Is this common with seals on the turbo going bad?

 

bump

 

What color smoke