Continuous white exhaust smoke

Check the engine coolant in your radiator to make sure it's not low...

White smoke from the exhaust is typically from water/coolant leaks into the cylinder...

Head gasket, water jacket, Intake manifold gasket, etc...

Pressure check the radiator and cooling system and check for leaks.

Is the oil light brown/white and milky? Another sign of coolant in the engine getting in the crank case...

Maybe do a compression check to see if the head gasket is leaking. Do a dry test, then a wet test with 2-3 squirts of oil in the spark plug hole and retest. Check to see if the readings are much higher wet vs dry and look for a pattern on the layout of the cylinders for the low ones... (Ie. a head gasket leaking between 2 cylinders would make them both low..)