Losing Coolant in a Ford Fiesta
2014-2017 Ford Fiesta vehicles equipped with a 1.0L EcoBoost engine may exhibit coolant consumption, white smoke and/or a rough-running condition. Refer to the extended coolant pressure test in the workshop manual section 303-03. If no external coolant loss is confirmed, further investigation of the integrated exhaust manifold (IEM) interface is required.
Carefully inspect the manifold port area for cracks. If a crack is found, replace the manifold.