The 6 Most Common Duramax LLY Engine Problems
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The 6 Most Common Duramax LLY Engine Problems

In order to meet stricter emissions regulations, the LLY replaced the LB7 engine and was the first Duramax to use EGR emissions technology. Unfortunately, the new EGR system was problematic leading to common valve failure. Aside from this addition the new engine received a variable vane turbo and eventually got some block and internal upgrades…