hey everyone first post on this forum so I apologize if its not in the correct area. Too the point, I have a 99 4runner 3.4, I just recently put a remanded engine in it and have less than 5k miles on it. Not long after putting it in, after my first initial break in, I noticed after long drives I shut it off and when restarted, it smokes sometimes alot and sometimes just a little out of the exhaust. Its almost a mix of blue and white? Or maybe grey. It doesn't smoke at all while driving and goes away after startup in about a couple seconds. Now I have to assume its not rings, or headgaskets since its brand new essentially. What other possibilities could there be? It runs just fine, only check engine light is for catalytic converter, basically everything on the engine is new. Only possible thing i could think of is an injector leaking into the cylinder while shut off? I'm running into a wall here. As far as i can tell in the short period I've driven it, no oil or coolant have used