Yeah, follow the above advise. Just drain the whole thing and refill with a 50/50 concentration of antifreeze and water. There are two drain plugs, one on the bottom of the radiator and one on the engine block.

If you are trying to increase the concentrion of antifreeze, is it that the car only has water in it right now?

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Ali Al-Chalabi

2001 CLK55
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record