Engine Cooling - Overview

WARNING: This page is about a different car, the 2018 Ford EcoSport. However, it is still accessible from the selected car via links, so may be relevant.

Special features

A three circuit cooling system is used on this engine. This means that as well as the conventional thermostats for the small and large coolant circuit, an additional thermostat is used to control a mini coolant circuit .

Because of the additional mini coolant circuit, in the first stage of the warm-up phase the coolant only flows through the exhaust side of the cylinder head . From here the coolant arrives at the oil cooler via the heat exchanger and from there it is passed to the coolant pump. In this phase there is no coolant flow in the cylinder block nor on the intake side of the cylinder head.

This leads to rapid warm-up of the engine and the engine oil, through which the friction at the lubrication points is reduced at an early stage.

Furthermore, in addition to the usual mechanical coolant pump, an electric coolant pump is installed in the coolant circuit.