Hi Terry,
on the side or the bottom of the radiator itself you will find a thick black rubber pipe attached to it.
There is usually a metal clip like a hose pipe clip attached to the rubber pipe right at the mounting where the pipe is attached to the radiator.
By undoing this clip you can drain the water and then add the anti freeze. But you would be better off flushing out all the old water and then refilling the radiator.
When you refill the system, use a 50/50 mixture of antifreeze and distilled or deionized water. Hard water that contains dissolved minerals will shorten the life of the additive package in the antifreeze. Softened water should also be avoided because it contains salt (sodium chloride) that increases the risk of electrolytic corrosion.
Regards
Harry
Harry, September 2006
