ok i have searched and all i can find is the bleeder screw for the single cam i was juss wondering if the d16a1 is in the same spot??? i have heat when i am driving but when i sit at a stop light the air gets cool, so i was thinking that i have air in the line bc no coolant leaks that i can see and i changed the oil last week before it got super cold and there was no milky substance in the oil so i dont think it is a headgasket juss wonderin lmk

 

Take cap off radiator, start enginr and let run for 10 minutes, put rag over radiator ( where the cap would be )

Air will always rise to the highest point. Turn on heat full blast as well