A coolant leak from the radiator can be caused by a defective thermostat bypass. This can cause pressure spikes in the cooling system, which leads to radiator failure. The thermostat assembly and radiator should be replaced.
Average mileage: 26,262,585 (6,000–2,147,483,647)
Engines affected: 6.0L V8 Diesel Turbo, 6.4L V8 Diesel Turbo, 6.7L V8 Diesel Turbo, 7.3L V8 Diesel Turbo
90 people reported this problem