A new proposed class-action lawsuit filed in the U.S. District Court for the District of Delaware is targeting Ford EcoBoost four-cylinder engines produced since 2010. The suit alleges that these Ford EcoBoost engines have an inherent defect that causes coolant to leak into the cylinders, which in turn leads to corrosion, misfires, engine failure, and fires.
The lawsuit alleges that Ford has known about this defect since 2010, based on pre-production testing, as well as numerous complaints filed by customers to the National Highway Traffic Safety Administration. However, the automaker has supposedly not yet addressed the problem or provided any solutions for owners of affected vehicles, outside of offering to install coolant level sensors, which don’t actually keep the coolant from leaking.
This problem reportedly stems from a defect in the design of the engine block and cylinder head, as well as an inadequate seal on the head, which then allows coolant to seep into the combustion chambers. The problem reportedly affects Ford’s 1.5L EcoBoost, 1.6L EcoBoost, and 2.0L EcoBoost engines used in a variety of vehicles including the Ford Escape, Ford Fusion, Ford Edge, Lincoln MKC, and Lincoln MKZ.
Aside from the aforementioned problems this causes, low coolant levels can also lead to engines overheating and causing damage to pistons and other internal components, as well as cracked cylinder heads. Ford issued a number of technical service bulletins between 2018-2020 related to this problem, as well as a recall in 2017 to install the aforementioned coolant level sensors
Plaintiffs in the case also allege that damage caused by this issue is not covered under warranty, and many have been forced to pay for repairs out of pocket.