The contact owns a 2018 Ford Escape. The contact stated that while driving on several occasions at various speeds, the vehicle was shuddering and shaking abnormally. The check engine waning light was illuminated. The vehicle was taken to an independent mechanic where it was diagnosed and determined that the EVAP purge valve needed to be replaced. The vehicle was repaired but the failure reoccurred two days later. The vehicle was taken back to the independent mechanic where it was diagnosed and determined that the spark plugs needed to be replaced. The vehicle was repaired but the failure persisted. The vehicle was then taken to a dealer where it was diagnosed with coolant intrusion into the engine. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 129,000.