Has anybody replaced freeze plugs on their 5.4 liter. Mine is 99 model. There must be one above the starter because it pours out when I add water. Ive had a small leak in my radiator so I didnt have coolant. Got into the 20's last week now I have water pouring out.

 

Have never worked on a 5.4 but have replaced many plugs on other engines. A driver is a must, its a long handle that will accept the adapters like a socket to a wrench. Pry out old, clean hole of any scale, put a llitle permatex around edge of plug and bang in place. Some will go in real easy and others are a fight. Suggest purchasing a couple spares in case one gets stuck or damaged during install.

 

Expanding neoprene plugs are, or should be, available and are easier to install. The plug is inserted into the port and the nut is run up. The neoprene is compressed at its center and expands radially to fill the port.
I must admit, however, that I haven't bought any for many years.

BTW: ....interesting name, "freeze plugs". They have nothing to do with freezing, rather, they fill the access holes in the external block casting through which the casting core supports run. Some core sand is also emptied through those ports....but, "freeze plug" does the job.