Thermostat, low coolant, inoperative radiator fan, failed water pump, plugged radiator, head gasket.
The valves on all engines in a 1989 Chrysler New Yorker are not adjustable. The hydraulic lifters are self adjusting.
A likely cause is an internally restricted radiator.
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Chrysler New Yorker was created in 1939.
Engine overheat, low oil pressure, or alternator voltage.
Transmission in need of SERVICE.
It is part of the pump module in the tank.
They are on both sides as well as the rear.
It uses regular old green antifreeze.
It is under the housing where the upper radiator hose attaches to the engine.
It is inside the HVAC housing behind the glove box.
Inside the glove box, behind an access panel.