bought a used motor from the junkyard drop it in started it up no problems drove it around until warm problem looked in the back window white maybe blue smoke i cant really tell all i see is alot of smoke. drove it back home waited till the next day drove it again same problem. there is only smoke when the car is fully warmed so what could be the problem?

 

Are you losing coolant or oil? Check those first and then get back to us.