Tech2803

About a couple month ago I had the head gaskets repaired on my 93 ES300. Since then my car runs fine but this morning I had light white smoke coming from both tail pipes and the heated oxygen sensor compartment I believe. Its a cover in the front center of the engine. Its grey and sits right above the oil filter. The smoke seems like steam. It is not distinct like when I bleew my heads. I had been smelling and seeing light smoke after my gasket repair but I was told that's normal after such a repair. It almost smells like a burnt smell. Any help will be really appreciated. This is my work vehicle..Thanx