Thousands of Ford vehicles have been recalled by the automaker due to problems with engine valves.

According to a report from Autoblog, Ford has decided to recall a total of 90,736 vehicles due to issues in the engine intake valves, which are at risk of breaking while driving.

The matter caught the attention of the National Highway Traffic Safety Administration (NHTSA). The recall affects certain Ford vehicles released from 2021 to 2022, such as the Bronco, F-150, Edge, Explorer, Lincoln Nautilus and Aviator.

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These vehicles reportedly had a 2.7-liter or 3.0-liter Nano EcoBoost engine, according to the NHTSA. The organization's documents noted that "engine failure" and "loss of drive power" could occur in the case of unexpected breaks while driving.

In an investigation in January 2022, Ford discovered 22 incidents that showed the engine intake valves became fractured and eventually fell to the engine's combustion chamber, causing damage to the component.

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Ford has successfully determined that root cause of these defects was due to valves that "exceeded its designed specification for hardness" and that these parts were fragile, increasing the risks of breaking.

The automaker concluded that these flaws were also due to the supplier's grinding processes, as well as the intake valve material's sensitivity. It stated that the material for the intake valves was changed after October 2021.

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As a solution, the vehicles' entire engines need to be replaced. The documents also stated that affected vehicles would be inspected by dealers to figure out the cumulative number of engine cycles. 

The dealers would also have to implement high revolutions per minute (RPM) engine cycles on each service procedure for vehicles that do not have the engine cycle threshold.

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