Strange smoke...

[CEF33Y]

Hey ppl, i've got a rb20det 5 speed cefiro.

I have a strange smoke coming from the back of the motor, it is quite faint, and only happens sometimes, only at idle. It doesnt smell like oil, nor coolant.

Motor has no apparent leaks.

AND i can't hear any sort of exhaust leak.

any ideas??

[Rolls]

Hey ppl, i've got a rb20det 5 speed cefiro.  

I have a strange smoke coming from the back of the motor, it is quite faint, and only happens sometimes, only at idle. It doesnt smell like oil, nor coolant.  

Motor has no apparent leaks.

AND i can't hear any sort of exhaust leak.

any ideas??

steam?

[strutto]

Cheech and / or Chong