![]() This “common problem” is really only common for folks pushing serious power. However, one common failure point on tuned LBZ’s is cracked pistons. With various upgrades, this engine is easily capable of producing over 600whp and 1,000lb-ft. The LBZ is revered for its tune-only performance capabilities. The LBZ and this engine problem guide are applicable to the following Duramax Chevy/GMC vehicles from 2006 to 2007:ĥ Most Common LBZ Duramax 6.6L Engine Problems However, the LBZ’s on the road today are getting up there in age and likely mileage as well so it’s important to consider the common LBZ engine problems prior to purchasing one. Overall, the Duramax LBZ is an awesome engine that is highly reliable and capable from a performance perspective. The engine was phased out in 2007 solely for the purpose of emissions regulations. When you couple the performance potential with the reliability, and lack of emissions regulating systems, it’s no wonder the LBZ is still the fan favorite over 13 years since its discontinuation. Because of this, the LBZ is a favorite amongst diesel enthusiasts because of its bolt-on mod performance capabilities. To support the power increase over the LLY model, the block was improved, the rods were forged, and the engine was overall built to withstand more power. Produced from 2006 to 2007, the shortest production Duramax, the LBZ produced 360hp and 650lb-ft. The LBZ Duramax is, still today, the favorite Duramax of diesel enthusiasts. ![]()
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