Chrysler Repair: 3.0L V-6 smoking badly from exhaust pipes, head gasket leak, chrysler newyorker

Question
Our car is a 1988 3.0l Chrysler NewYorker Landau. Car is smoking from exhaust. Just put a used 3.0l engine in it. Thought it would quit. Smoking really bad now.

Answer
Hi Ken,
The color of the smoke is significant to observe:
White smoke (steam) with an odor of antifreeze is due to a water leak from the cooling system internal to the engine and entering the combustion chamber of one of the cylinders, due to a head gasket leak in all likelihood. Let some of the smoke condense on the palm of your hand and sniff it for antifreeze odor.  Most noticed when starting the engine from cold.
Black smoke is due to poorly combusted fuel due to a mixture issue or a bad spark situation
Blue smoke is due burning oil, most likely due to oil leaking around the valve guides (a weak spot for the early 3.0L  engine, later improved and can be corrected with upgraded valve guide/seal) or it could be due to worn piston rings.
Also most noticed when starting a cold engine.
So get the sun in a position where you could look thru the cloud with the sun backlighting the smoke so you can determine the color more easily.
Let me know what you learn and whether I can give you any further suggestions.
Roland