Engine Coolant

WARNING: Engine coolant contains monoethylene glycol and other constituents which are toxic if taken internally and can be absorbed into the skin after prolonged contact.

Engine coolant concentration should be checked through the neck of the expansion tank with a hydrometer. The acceptable range of Specific Gravity (sg) of correctly balanced fluids is between 11.10 and 11.20 lbs/gal, which represents an engine coolant concentration between 40% and 55%. If the concentration falls below 40% there is insufficient low temperature protection and the corrosion resistance will be inadequate. In such cases the concentration must be brought back to specification.

Focus uses an green colored engine coolant. This should not be mixed with other coolant types. For cooling system top up, only use coolant which meets specification E2F2-19549-AA, (Ford premium engine coolant).