The higher boost and performance can eventually lead to head gasket failure because it increases wear and tear.
The Turbochargerīecause of it’s size and flow characteristics, the Garrett VVT Turbocharger makes experiencing head gasket failure significantly more common. Here’s how the different factors I just listed can play a role in blown head gaskets on your LLY. Aftermarket modifications can also cause these issues, especially at lower mileage. There are other factors that can play a role too though. This is largely due to the huge factory turbocharger and overheating issues caused by a poor cooling system. Head Gasket Failure is more common the LLY Duramax than any other Dmax generation. Improve air flow by up to 76% over stock with the S&B Turbo Inlet Manifold. All in all, it translates into better drivability, reliability and performance. Any of the Turbo Inlet Manifold kits listed below will do the trick!
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This will not only help your truck run cooler, but it will also free up some extra horsepower and torque! Turbo spool-up times are reduced too. Thankfully, fixing the turbo inlet manifold is as simple as replacing it with a less restrictive aftermarket part.
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How To Fix the LLY Duramax Turbo Inlet Manifold Problem It also provides less than optimal performance and fuel economy. It does this by essentially choking the turbo because of its small, restrictive design, forcing it to work harder to produce the same amount of boost. The LLY Duramax turbo air inlet manifold, sometimes called the turbo mouthpiece, forces the turbocharger to work harder than it needs to. The main restriction is the turbo air inlet manifold. Unfortunately while this turbocharger provides significant air-flow, the LLY Duramax has several components that are extremely restrictive, resulting in problems because of it. This makes it a prime candidate for aftermarket upgrades like a tuner. The LLY Duramax utilizes a Garrett variable vane turbocharger (VVT) that has a bigger turbo compressor wheel and taller vanes than other Duramax generations. If you want to jump to a specific section, simply click on any of the bullet point links below. LLY Duramax Submitted From on Instagram What Are the Most Common 2004.5-2006 6.6L LLY Duramax Problems And How Do You Fix Them Most Common LLY Duramax Problems Here is a list of the 11 most common LLY Duramax problems and how to fix them. So, if you’re looking to improve your LLY Duramax in more ways than one, you’ve come to the right place. Solving many of these problems will not only improve longevity and durability, but they can often improve performance too. You just need to have a little mechanical know-how. Thanks to the aftermarket, most of these problems can be solved relatively easily. In fact, a number of other common 6.6L LLY Duramax problems exist. These two components aren’t the root of all LLY Duramax Problems though. Like every other diesel out there, the emissions additions result in problems and lesser reliability. For that reason, they had to include a problematic EGR system to comply with emissions regulations. The LLY Duramax also came at a time when emissions regulations began to become stricter. Much of this superior performance is attributed to its massive variable vane turbocharger, the biggest turbo ever found on a Duramax truck. Some of these 6.6L LLY Duramax engine problems stem from the fact that it has significantly more horsepower and torque compared to the original Dmax. Thankfully, the LB7 injector problems were resolved, but some new problems revealed themselves.
It can last hundreds of thousands of miles, but it still has its fair share of issues. The LLY Duramax engine found on 2004-2006 Chevrolet/GMC HD trucks is the second generation of the Duramax line. Identifying Problems Early and Bulletproofing 2004-2006 Chevy HD/GMC Diesel HD Trucks
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