Engine Smoke

[DarkAngel]

Hello, it's me again

i have one question :
when i start my Z, the engine smoke for about 5mn to 10mn and then its ok
it happens often when the car stayed for a certain amount of time without moving
is it normal ?

here is a pic from where it comes (left part of the engine)


and a video
http://youtu.be/qG_aVo_l6C0

Thanks