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: 78,043 (36,200–170,000)
Engines affected: 6.0L V8 Diesel Turbo, 6.2L V8, 6.4L V8 Diesel Turbo, 6.7L V8 Diesel Turbo
37 people reported this problem