My left side header is smoking bad when I turn the car for a while even if I drive it for like 20 minutes it still smokes I don't know what is wrong with my car can someone give me advice on how to fix it or to look for what's causing it to smoke please and thank you

 

Have you done any work where oil dripped on the headers? Mine did that for a while when I adjusted the valves on mine until the oil burnt off. If not, check to see if the valve covers are leaking oil onto the headers if so maybe replace the gaskets.

 

Well my engine is new its a swap so yes I'm sure I grabbed the headers with my hands filthy with oil and my gasket was leaking a bit because the rubber gasket it had melted so I just replaced it with a new cork gasket and ran the car for 30 mins and it stopped smoking