FordFocus Diesal?

take cap off water bottle, jack car onto axle stands, disconnect bottom hose on radiator, and collect old coolant in a suitable container, disconnect top hose and flush radiator with hose pipe, if you can take thearmostat off and flush engine, reconnect all pipes and t/stat, take car off axle stands, and refill with correct type/amount/mix of new coolant, after driving car for a few miles, check water level.

hope it helps
September 2010