Man tonight I am full of questions.... I just bought a rx7 that has a street port, 3mm apex seal motor with 1900 miles on it. It smokes for a few seconds on start up, I think its blueish black. Should I be concerned or is this kinda normal on start up? Doesnt do it any other time.

 

*whew...* had me kinda sweating it for a while. I remember my last rx7 popped a engine after seeing smoke on start up.. but itwas white.