Detailed Pre-checks
WARNING: This page is about a different car, the 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
Check the thermostat opening temperature to make sure the cooling system is operating at the specified temperature. If it is low, internal engine parts are not running at specified internal operating clearances.