We've had two engine failures with this truck. The first occurred at 121,000 miles when an o-ring on a cylinder sleeve failed letting coolant fill the crankcase and requiring a complete engine overhaul that cost us over $6,000 dollars. The truck was more than 3 years old so we had to pay for the repairs. After putting only 40,000 miles on the rebuilt engine it has thrown a rod out the side of the block completely ruining the engine. It will have to be replaced at an estimated cost of $16,000. We have contacted...
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navistar because the service technician said both failures were caused by poor workmanship, defective materials, or faulty design. Navistar has refused to stand behind their product. *Tr