The Duramax’s greatest years are 2006 and 2007. These engines are both dependable and capable of producing a great deal of power. The only issue with the Duramax from 2006 to 2007 is that the pistons crack when the engine is driven at more than 600 horsepower.
But what distinguishes these models from other Duramax engine types, and are there any other viable options within the product line?
What year of Duramax is the most dependable?
The following year types of Duramax diesel engines are safe to buy: 2010 2017. Duramax LGH is a kind of Duramax. Duramax LML from 2011 until 2016. Duramax XLD25 from 2011 until 2021.
What Duramax generation is the best?
This blog post is for you if you have a diesel vehicle and are looking for the best engine. We looked at horsepower, torque, fuel efficiency, durability, and cost of ownership to see what makes an engine exceptional. With that in mind, we’d like to introduce you to the 6.6L Duramax LB7, our overall favorite diesel engine!
The LB7 Duramax was first launched in 2001, when GM’s 6.5L Detroit diesel was phased out. The Duramax outperformed the outmoded Detroit and constituted a watershed moment in the diesel market for Chevrolet and GMC vehicles.
The LBZ Duramax was released in 2004 and quickly became the most popular diesel engine ever. It’s also renowned as one of GM’s most dependable engines, having sold over 500,000 units between 2001 and 2007. In 2006, the LLY Duramax followed closely behind and would soon overtake its predecessor in popularity.
View our table below if you’re looking for an engine with a lot of horsepower, torque, fuel efficiency, durability, or value:
Duramax LBZ 400 horsepower and 800 pound-feet of torque 25% higher fuel economy than any other diesel engine on the market today, and can last up to 12 years with regular maintenance. On average, $5000-$7500 is spent.
Duramax LLY 450 horsepower and 850 lb. ft. torque – 30% more powerful and efficient than its predecessor, with the ability to provide greater power at lower RPMs; expected lifespan of 16 years with routine maintenance. On average, $6000-$8000 is spent.
There are many wonderful engines on the market today, but if you want an engine that produces a lot of horsepower and torque while also being fuel efficient and durable, the Duramax LBZ or LLY is a great choice.
Which Duramax engine is the best? 1. 6.6L Duramax LB7 – Best Diesel Engine Overall When GM withdrew the 6.5L Detroit diesel, the LB7 Duramax was released in 2001. The Duramax outperformed the Detroit and marked a significant turning point in the diesel market for Chevrolet pickups and GMC trucks.
“I’ve owned three LB7s: a 2002, a 2005, and a 2006.” Except for the LB7, which lost injectors after 75,000 miles in Guadalajara, Mexico, all engines were outstanding to great. This car had been laden with stones and had driven 3500 miles using diesel as the crankcase oil. There was no harm done. It can be difficult to replace the injectors in an LB7. The LLY was more fuel efficient than the LB7, although the LB7 was more fuel efficient. I was able to get the LBZ to match the LB7’s mileage. Until I chipped it, LLY was a sweetheart. The power upgrades on the LB7 and LBZ are not available on both models. The exhaust systems on all versions were 4″ in diameter. The LBZ is the most calm and gives me the most miles. With 19.5 tires, it can tow hefty loads. I’ve driven my LBZ for 90,000 miles and it’s never let me down. It tows 18,000 trailers with tri axles, is quite difficult to drive, and is extremely dependable.
Which is better LB7 order LBZ?
The Lb7 is slightly more efficient, but it gets significantly more mileage. My injectors have only needed to be replaced once every 140,000 miles. The LBZ has a lot of power, which is evident. Despite the fact that it only has 15,000 miles, I have had no troubles with the LBZ. Both are fantastic.
Is the LB7 a strong motor?
Duramax Duramax Duramax Duramax Duramax Duramax Duramax When the LB7 is in stock, it’s a fantastic engine. The block and its internals are built to survive 350,000 miles or more. The majority of the head gasket and injector problems on these trucks are old enough to require repair.
What is it that makes the LBZ Duramax so special?
The six-speed Allison 1000 auto transmission was first used with the LBZ Duramax engine. The new six-speed could handle more horsepower than the previous five-speed. This means they’ll be able to manage around 100 horsepower more than their predecessors.
What were the years when Duramax had issues?
Due to its absence of emissions control equipment, the LB7 remains immensely popular among diesel enthusiasts as the original Duramax model. In general, it’s a tough and dependable engine. As the initial models approached 100,000 miles, however, significant concerns arose. On the LB7 engines, injector failure was a typical occurrence.
Even GM noticed the issue, since the original design was later modified and the revised Duramax parts were given a 200,000-mile warranty. If you’re looking to buy a used LB7, make sure it still has the original factory injectors. If it happens, you’ll need to look for a new work soon. Other serious issues with the LB7 included:
Which Duramax diesel engine is the best?
The first-generation Duramax, the LB7, was released in 2001. Because it had greater power and was more reliable than the other Duramax engines, it is frequently regarded as the best of the Duramax engines. Because of the enhanced electrical system, dual-zone HVAC, and other modifications, the LB7 in 2003 and 2004 is the best.
What is the maximum range of a 6.6 Duramax?
The DuramaxTM 6.6L V8 Turbo Diesel Engine comes with a 100,000-mile/160,000-kilometer warranty. The DuramaxTM has been tested for up to 200,000 miles (320,000 kilometers) of travel. Within its design restrictions, the DuramaxTM powertrain is intended for reliability, peak horsepower, and torque.
Issues With the Fuel Lift Pump
The fuel system of Duramax diesel engines is direct injection. The fuel injection pump is one of the most significant components of this fuel system. Most Duramax engines come with a CP3 fuel injection pump, which is reliable but not extremely strong.
Because this fuel system lacks a lift pump, the injection pump must work extremely hard to both suction and pressurize the gasoline. When the engine accelerates, the lack of a fuel lift pump usually results in a loss of fuel rail pressure.
How To Fix This Lift Pump Problem
Adding an aftermarket lift pump is probably the best way to address this common Duramax issue. You may extend the life of your Duramax engine by installing a lift pump. A new lift pump boosts engine performance while lowering pollutants.
Water Pump Problems Are Common
Water pumps with plastic impellers are standard on newer Duramax engines. These impellers are flimsy and prone to breaking. Duramax engines’ water pumps are similarly prone to leaking. Engine overheating can occur as a result of these leaks. Water pump leaks can potentially impair system pressure, resulting in insufficient coolant supply.
Replacing a Duramax Water Pump
When you have a broken water pump, you should replace it straight soon. It’s a good idea to look for a water pump replacement with an iron impeller. These impeller replacements tend to last longer and function better. If your Duramax engine has a lot of miles on it, the thermostat and water pump housing may need to be replaced. This will help you avoid future problems with your cooling system.
Duramax Engines Are Notorious For Fuel Injector Problems
The original fuel injectors that these engines come with are maybe the most prevalent gripe you will hear from Duramax diesel owners. GM’s staff even confessed that its injectors were badly built and that they had been modified in recent years. One of the most serious issues with these injectors is their proclivity for cracking.
Fault ball seats are also present in these injectors. These injectors leak over time due to malfunctioning ball seats. Injector failure can result in power loss, harsh idling, and excessive smoke.
Remedying Your Injector Issues
The only method to solve this problem is to replace faulty injectors. Because these injectors are hidden beneath a variety of other engine components, it’s a good idea to have them replaced by professionals.
Which is better, the LLY or the LBZ?
The engine and transmission are same between the lly and the lbz, and the ecm has the tune of a 05 lly with 310hp rather than the lbz’s 350hp. Throw a tuner on there and it won’t matter.
Is the Duramax engine superior to the Cummins?
Torque is the most important factor in hauling, but horsepower isn’t far behind. Whether you’re towing or not, more horsepower means faster acceleration. With 445 horsepower, the latest Duramax 6.6L L5P diesel dominates this category. The modern Ram Cummins 6.7L 24V diesel engines have 400 horsepower. Historically, the Duramax line has had a modest horsepower advantage over the Cummins line.
Which is better, the LB7 or the LLY?
After weighing the advantages and disadvantages of each Duramax, it’s time to choose a favoritebut this isn’t a simple task. The truth is that each version of the 6.6L V8 diesel has its own set of advantages. In terms of emissions restrictions, the LB7 was the most straightforward, while the LLY had the largest turbocharger ever available. Aside from the inclusion of a diesel particulate filter, the LBZ had a number of upgrades, including significantly higher power, and the LMM was almost identical to it. The LML introduced increased fuel pressure, lower emissions, and roughly 400 horsepower, while the current L5P upped the ante even more by offering 600 rwhp on 2017 and newer GM trucks.
Let’s go through some of the ups and downs related with each mill to complement what we learned in our Duramax History Lesson series. Then we’ll tell you which one we like and why. We don’t blame you if you prefer Duramax over another RPO code. You can’t go wrong with any version of this engine, regardless of generation. They’re pretty good in terms of hard parts. They can easily go 300,000 miles (or more) if properly cared for, but if you’re willing to maintain one that long, they can easily go 500,000 miles (or more). Since the turn of the century, the Duramax platform has made GM a credible rival in the diesel pickup market, and there is no indication that this will change in the near future.
What year did Duramax’s injectors fail?
We recommend getting a service handbook if you are performing this job yourself because the method varies from model year to model year and is complex enough that we recommend purchasing a service manual.
How much does it cost to replace injectors on LB7?
Having a mechanic replace 8 injectors on an LB7 Duramax can cost anywhere between $4000 and $5000 CAD, depending on what else is done at the same time.
What year Duramax has injector problems?
The LB7 Duramax was produced between 2001 and 2004. Injector failure has been linked to the number 5. The good news is that the replacement injectors you buy from us come with a number of improvements to assist you avoid recurrence failures.