door drain holes are plugged. open door and look at underside for drain holes. open them with a small screwdriver. door may need vacuuming inside to remove crap like pine needles that get inside.
bad door seals
Water pump removal chevy monte carlo 3.8
Ebay..!!
whats the eigine size
In a 1997 Monte Carlo Z34 you will require 1 and 3/8 gallons of antifreeze. ?æThis is to be mixed with an equal measurement of distilled water.
Very likely
Blown head gasket.
This is either the heater core leaking coolant or the air conditioning drain line is plugged. If the water tastes sweet on your tongue or is warm it is from the heater core.
http://www.youtube.com/watch?v=n0u5uOC_YIo This is good
Your cabin filter seal is missing or out of place.
You've got yourself a bad heater core, I am sad to say. Or the door sills are full of leaves/debris.
Not sure what you mean by "hot water valve". More info please.