As Steve mentioned, there was few years where the 6.5 turbos were experiencing cracking around the number 8 cylinder - it was a bad combination of design and application. Many trucks had the faulty engine removed and a "corrected" engine installed as a result.
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Originally Posted by blindzebra
Why is it that all H1's that I see for sale always have new engines at like 40k to 50k miles? Is it just due to the amount of dirt they inhale off road, or will the Duramax last much longer?
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