Well! I found out,their was half a thermostat in the intake. The top was ripped off,!and the bottom was missing...all it was,was the center ring,plus gasket,of the thermostat.sounds like chop shop stuff too me.
It worked fine, 1 day after, cell comes on. Ran a code scanner,same thing,,p 0402 code. I believe i can smell coolant at startup, not when engine is at running temperature,coming in through vent with fan on. I have had too add half gallon of coolant so far,power 3 days,checking radiator level hours after turning car off.
I'm gonna use a bow beam torque wrench,which I have, and loosen only,the intake valves,and re tighten them too spec,with it. Their supposed too be the most reliable and accurate torque wrenches....
I do know,I put a generous amount of rt v sealant on,on top the corners of the plastic sidepieces,and under them. All I can think,is maybe the intake manifold didn't seat right on the rubber parts of the gaskets?