The 6 Most Common LLY Duramax Problems Bent rods Head gasket failure EGR valve failure Glow plug failure (2006 only) Overheating (pre-2006) Fuel pressure relief valve 1. Its best to have this looked at by a professional so they can address any other problems that might be causing issues with your vehicle. Duramax Oil Capacity, Weight & Pressure [True Specs Uncovered! We want you to hear this - we don't think the Duramax is a weak series of engines. Q) What is the LML Duramax's CP4 Failure Ratio? What Liquid to Use in Ultrasonic Cleaner for Carburetors? Have you been facing problems like, Read More Can Fuel Injector Cleaners Cause Problems? This occurs when the LLY Duramax LLY engine overheats and coolant seep into the combustion chamber. This component has been known to crack and break due to regular wear and tear, especially if youre driving at high speeds for long periods of time or driving on rough roads often. Over time, the seal becomes damaged and causes a coolant leak. Low fuel rail pressure is a very common issue we see on Duramax trucks. Youve, Read More How to Reset a Mass Air Flow Sensor? good oil - use the oil that is recommended by Chevy for this engine, otherwise, the longevity will be questioned; regular maintenance - this is a simple tip but it helps owners drive their vehicles with Duramax engines for decades; only high-quality fuel - cheap diesel fuel with unknown background is not an option for you if you have the vehicle equipped with this engine; no revving up - the highest RPM for the 6.6 Duramax engine is 3450 rotations, the unit doesn't love being revved up like crazy; regular diagnostics - find a mechanic who will diagnose this engine once a year and see if it can go another year with no problems. Where I work (Large Hospital) There are at least 10 Duramaxs (LLYs) with over 100K some with over 200K and none have had a head gasket problem. However, like all machines, they do experience problems over time. Similarly, the LML Duramax engine. But once you start researching forums and reviews, you will see that things are a little worse than they seemed to be just a moment ago. I figured out more pros than cons of using this engine upon research, which makes this engine an excellent choice for trucking! The best and worst years for Duramax include the 2007 engine, widely regarded as the best, and the 2003 Chevy Engine, which was the most problematic. Overheating may also be caused by problems with the thermostat. But still, it's not the worst solution. One more possible place for a coolant leak is the water pump. This is one problem that you should consider before purchasing the 3.0 Duramax. Here are some of the main issues you can have. At least, for the first 100,000 miles. Here are some other advantages of the 6.6 L engine: The V8 engine has a relatively simple OHV construction, its block is made of iron. If properly maintained, it should endure for 200,000300,000 miles, like the majority of diesel engines. Owning one will inevitably require some maintenance; well talk more about this later; Nonetheless, with appropriate care, it should last the whole expected lifespan. 2. There are so many LLY Duramax models, its hard to say which ones are more prone to experiencing common issues than others. Guide. Since its debut in 2001, it has seen a fair number of problems, and a recurring trend seems to be that the older versions are more prone to malfunction than the more recent ones. (Step By Step)Continue. A: Bosch created the injection pump with the ability to do two tasks, which allows the Duramax to run without a lift pump. If you experience these problems in your vehicle, it may be the best time to go and check the turbocharger. This is a high-mileage problem but you still need to consider it. The LML Duramax also didn't come with an . (Explained)Continue, Freeze plugs are an essential component of almost every cars engine block. It depends on your maintenance methods. The eventual mpg depends on the vehicle, but it's impressively good. One LLY Duramax LLY engine problem that can be life-threatening is the LLY bent rods. and find out more about its history, critical reception, and meaning. 68 Views. The 20112016 models of the popular heavy-duty (HD) pickup truck, the Chevy Silverado HD, include the LML Duramax Engine. This issue occurs because the LLY Duramax ECM (computer) can detect a problem before it occurs and LLY Duramax LLY engines will throw an error code to alert you of this. This engine can go up to 300,000 miles if you maintain it properly. A: Your GM trucks EGR system will be the sole emissions system left. A: With the exception of the CP4. Its crucial to be aware of the most typical LML Duramax Problems if youre thinking about buying a GMC Sierra or Chevy Silverado with a Duramax engine for better decisions. But it still has some problems and issues you need to know about. How to prolong the life of the 6.6 diesel in a Chevy? by Truck Master and see the artwork, lyrics and similar artists. It can be repaired even after fatal failures. key tags, decals and shirts! https://truckmasterdiesel.comEqualizer Hitch! People frequently misinterpret fuel injectors as a typical cause of this failure. Yes, this is a pretty good and durable engine that can be called the best in its sphere. We want you to hear this - we don't think the Duramax is a weak series of engines. My 05 GMC 3500 single wheel Duramax has left me stranded three times now. Your email address will not be published. When properly maintained, the LML Duramax is a highly dependable truck. Cranking Issue. If you notice any knocking noises coming from under your hood, please take care of this as soon as possible. This causes your LLY Duramax engine to lose power- which means you need repairs as soon as possible! This will either result in major damage or possibly an explosion if it doesnt break anything first. The fifth problem with 3.0 Duramax that a user has reported is the continuous showing up of the P1488 CEL code. If there are issues that arise while on the road, inspect the system with your handy . This means that you will burn less fuel for making the same distance as with many other diesel engines. It's not that simple and it will take some money from you when it's broken. While a more involved fix, like rebuilding the engine, would be about $15,000 with an additional $5,000 in labor costs. Yes, the competition is not very dense, but still, this is a very important thing to remember. Fortunately, there are some relatively simple ways to prevent these issues and make them less common. But all of these problems can be easily solved by an LLY Duramax certified mechanic! A gear pump is located within the CP3 and CP4 and pumps gasoline into the high-pressure area while simultaneously drawing fuel from the tank using suction. Today, I take care of a rather important issue that the Duramax trucks have. While these issues can be frustrating, they are somewhat less complicated to fix and should not deter you from considering a Duramax LML-equipped vehicle. 1. You may kiss goodbye thousands of dollars to get your vehicle back on track. Reading about this many common problems about the LLY Duramax engine can be discouraging, but there are many benefits to LLY Duramax LMY engines. One of the LML Duramaxs most troublesome components is the CP4. The information on this website is derived from publicly available sources and AutoLawNow.com cannot verify or confirm the genuineness, truth, veracity or authenticity of this information. other exhaust fluid component issues - couple Turbo issues - couple There have been other issues that diesel owners have that are similar to gasser issues like radio interface, etc What Models of Cars Have LML Duramax Engines? This occurs when coolant fails and causes your LLY Duramax engines to overheat, which will cause damage if not addressed immediately! Unlike other vehicles, these trucks don't come with a lot of standard extras. Read about Duramax Problem's That Will Leave You Stranded! Playing via Spotify Playing via YouTube Playback options This causes LLY Duramax engines to have issues accelerating, which can be dangerous. Here are some user reviews that will help you decide if LLY Duramax LMY engines are the right fit for you: Although LLY Duramax LMY engines have had issues in the past, they are improving over time. This can cause damage to your LLY Duramax LMY engines pistons and rings, which means you will need a repair sooner rather than later! While these engines are still relatively new, they seem to be extremely reliable so far with very few "common" problems that haven't been solved or addressed. Most Common Problems With 6.6 LLY Duramax: 2. This will cause LLY Duramax LMY engines to stop working properly and eventually start experiencing fuel efficiency issues as well! The Bosch CP4.2 injection pump on the LML Duramax is coined a "Ticking time bomb" by many people familiar with the LML platform. By getting the LLY Duramax LLY engine serviced at this point, you can avoid future problems with your LLY Duramax LLY engine! But the 6.6 Duramax may surprise you. Listen online to Truck Master - Duramax Problem's That Will Leave You Stranded! Fortunately, this component gives you a few signs that it's on the verge of dying. Common symptoms of low fuel rail pressure are the following: Low power or engine power reduced message in driver information center (DIC) Change fuel filter message in driver information center (DIC) Now that you are all about the Chevy Duramax, you should get the best engine for your truck and avoid all the problems and bad models of the product. We've investigated some forums and spoken to owners in order to provide you with the most up-to-date and fair information about this engine and its drawbacks. Only wish I had the 6-speed tranny., Very happy with my 05 which I use mostly for towing. It is among the swiftest vehicles available for off-roading and hauling. The LML Duramax Engine is used in GMC Sierra HD vehicles from the 2011 through 2016 model years. The LLY Duramax engine also includes glow plugs that help startup and increase fuel economy. If you own an LML Duramax, you might be curious about the price of any repairs. Although the 6.6-liter Duramax is sometimes called the best diesel engine in the Chevy lineup, we often get bad reviews and opinions from very irritated owners. It has a strong suspension system that can handle difficult terrain and is supported by a durable frame that is made to bear high loads. Manual Transmission Noise, Goes Away When Clutch Pressed Why? The third common 3.0 Duramax problem is inappropriate DEF fluid consumption. This is true for the 6.6 Duramax because it uses expensive injectors and it needs high pressure of diesel fuel to work properly. They manufacture high-quality, Read More Best Shocks for Harley Street Glide: (Top 5 Picks In 2022)Continue, The mass air flow sensor in your car needs resetting if you replace or re-install it. GM's 3.0-liter I-6 turbo-diesel is the most fuel-efficient engine for the Silverado 1500. Problems like the EGR valve failing or getting stuck open may also happen to your Duramax 3.0. This engine can live long and it has just a couple of minor problems that will probably bother every owner. Thank You! The majority of owners view the injection pump as a ticking time bomb, therefore the simplest replacement is usually to just switch it out for another one before it malfunctions. Instead of plastic, the water pump of LB7 consists of cast iron. The Duramax engine will last whatever long you want it to, just like any other engine. DEF Heater Problems. Many Duramax engines still function flawlessly even after 100,000 or more miles on the road today, proving how dependable they are over time. It's important to know a specialist who can diagnose your engine, help maintain it, and also repair it if needed. Final Words: If your LBZ Duramax is overheating, the water pump or fan clutch can fail. 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