Re: coolant flush & fill 05 taurus
Get some radiator cleaner, 5 gallons of distilled water and two gallons of 100% antifreeze. You also need some jack stands, jack and a 5 gallon bucket. Only tools are a pair of channel locks.
Then drain the coolant. This is easiest done at the lower radiator hose where the 1" hose from the tank tees into it on the passenger side. You do not need to take off the plastic shield.
Fill the system with first the cleaner then straight tap water. Drive around for a while, 20 minutes to 2 days depends on how you feel about it.
Then drain the water and cleaner out. Fill with tap water and idle the engine for 20 minutes making sure the thermostat is opening. Feel the upper radiator hose and see if it is too hot to hold.
Then drain the water again and fill with distilled water. Idle engine for 20 minutes again making sure the t-stat is opening.
Then drain the distilled water. First pour in one gallon of the 100% antifreeze. Then cut the second gallon to a 50/50 mix using the distilled water and top off the system with this. Be sure to completely fill the tank and to check it again for the next couple of days when it's cold. Keep the tank as full as possible.