Originally Posted by CLARK LAWN
Turbos generally fail due to dirty oil, check the oil intervals. If the EGR cooler failed it sent coolant through the engine and out the exhaust. Make sure they had the DPF cleaned if not you may want to drop it and inspect for damage from the coolant.
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they didn't put DPFs in till the 6.4s. My 06 6.0 Powerstroke doesn't have one. And it's got 181k on it and its stock never had a problem.