Repulse the winter — frost protection down to -30°C

Frost protection down to -30°C is perfectly sufficient in our country. This corresponds to about 50% Ford concentrate based blend. But if you periodically leveled the liquid level in between by adding water, then perhaps the concentration of antifreeze will no longer be sufficient for low temperatures. Check the concentration of the mixture with a hydrometer. Rule of thumb: adding about ¼ liter of coolant concentrate increases frost protection by about 10°C. If in doubt, ask your Ford dealer to prepare the coolant again.

Be careful: do not mix the original coolant with other products - in this case, the anti-corrosion protection and immunity of light metals to the coolant will not be ensured. In the extreme, this will result in a major overhaul of your Focus, ie. if you want to add fluid and the specification of the new fluid being added does not match Ford's prescription, it is best to replace the entire coolant.

Stages of work

First, relieve the pressure in the system through the cap on the expansion tank. Be careful: if the engine is hot, there is a risk of scalding.

Place a clean receiving container under the radiator and remove the lower coolant hose clamp or drain plug. Remove the coolant hose from the fitting.

In order for the coolant to drain better, remove the cap from the expansion tank. Drain approximately 1-2 liters of coolant, cover the receiving container.

Install the lower coolant hose (if necessary, use a new clamp). Tighten the screw plug.

Pour the correct amount of coolant into the expansion tank. Top up the remaining amount with the drained coolant and close the expansion tank.

Total quantity - quantitative ratio (up to -30°C)

Engines	Cooling Concentrate (l)	Water (l)	Total (l)
1.4 L Zetec-SE	2,5	2,5	5,0
1.6L Zetec-SE	3,0	3,0	6,0
1.8 L Zetec-E	3.0	3,0	6,6
2.0 L Zetec-E	3,3	3,3	6,6
1.8 L Endura-Turbodiesel	4,65	4,65	9,3
1.8 L Endura-Dl-Turbodiesel	4,65	4,65	9,3