how can I stop smoke on 1990 Acura Integra

I went with a machanic to stop the smoke I change the motor but this still with the same white smoke.

Asked by for the 1990 Acura Integra
If you had a blown headgasket it will blow white smoke. After replacing the engine you may have residual water/coolant in the exhaust system that can take a couple days to burn out. If it continues, check the engine oil cooler (if applicable) and have the head gasket checked again.