Best Injectors For LB7 Duramax Turbo Diesel Engine In 2024

Right near the beginning of the twenty-first century, General Motors and Isuzu Motors Ltd. collaborated and formed a partnership. The very first engine they produced was the 6.6 liter LB7 Duramax turbo diesel engine.

This engine was put in and utilized by the first-generation Chevrolet Silverado and GMC Sierra trucks.

The production of the LB7 Duramax stopped by 2004, but the engine still remains in circulation to this day. Despite its popularity, a downside of the engine was its lackluster injectors that cracked or didn’t fit properly.

If you are looking for possible replacements, we have you covered.

The Top Replacement Injectors For The LB7 Duramax Today

Despite being more than two decades old at this point, the LB7 Duramax engine remains popular to this day. The main reason is its overall reliability and simplicity compared to the more powerful but complex diesel engines of today.

However, an infamous characteristic of the LB7 engine that still persists to this day is its faulty injectors.

When it was still being manufactured, the failure rate of the injectors was so high that they were recalled. General Motors then replaced the injectors and extended their warranties.

The main cause for the malfunctioning injectors was reported as poorly filtered fuel. This issue persists with the LB7 Duramax to this day. As a result, many people immediately choose to get aftermarket injectors installed in place of the existing ones.

Below is a list of some possible replacement injectors for the LB7 Duramax engine that can be considered.

  • New LB7 Injector By Bosch
  • Remanufactured 6.6 L LB7 Duramax Injector
  • Dieselogic 6.6 L LB7 Duramax Remanufactured Injector
  • Reman Auto Electronics Duramax Fuel Injector
  • S&S Diesel LB7 Duramax Injector
  • Industrial Injection Performance LB7 Duramax Injector

All the aforementioned injectors will perform similarly if not better than the built-in injectors of the LB7 Duramax engine.

On top of that, there will not be any risk of injector failure with any of them. Now let’s take a look at all the listed injectors individually. We will be breaking down and analyzing all their characteristics and specifications separately.

Bosch LB7 New Injector

Bosch LB7 New Injector

One of the leading producers of diesel engine injectors and injection systems that exist today is Bosch.

Along with manufacturing their own products, another part of their work is to make replacement products for existing ones according to the original’s standards.

The new Bosh LB7 Injector is one that has been uniquely designed specifically to compensate for the shortcomings of the LB7 Duramax engine’s original injectors.

The main reason the new injectors by Bosch overcome the flaws of the original injectors is their build. The new injectors are made from a stronger material than the originals.

The new build makes them stronger and much more resistant to any external damage. They are also built in such a way that they fit perfectly in the engine.

Along with that, the injectors are fitted with hardened chrome-plated ball seats to protect against internal corrosion. The body is also polished thoroughly for a sleek and compact look.

In short, the greatest characteristic of the Bosch injector is its overall durability and strength over the original LB7 Duramax injectors.

Remanufactured 6.6 L LB7 Duramax Injector

Remanufactured 6.6 L LB7 Duramax Injector

The original injectors in the LB7 engine were manufactured by Duramax.

After all the faults and failures were recognized, they went ahead and remanufactured their original injectors.

With their remanufactured injectors, Duramax pretty much got rid of all the flaws with their original injectors.

The main issue was of course that the original injectors were prone to cracking.

The remanufactured injectors have been made much stronger to be more resistant to cracking and corrosion. Because of the added reinforcement, the new injectors will not crack or leak at all.

Another added benefit to this is that you may be eligible for a refund if you send your original injector back to get remanufactured.

Provided you meet the requirements, you may be entitled to a refund of $50 if returned within 30 days of shipping or $37.50 if returned within two weeks.

Dieselogic 6.6 L LB7 Duramax Remanufactured Injector

Dieselogic 6.6 L LB7 Duramax Remanufactured Injector

Another remanufactured version of the original injector LB7 Duramax engine, this one is manufactured by Dieselogic.

It is essentially very similar to the previous two remanufactured injectors; in that, it is a direct improvement to the original design without adding or removing anything.

Like the others, this remanufactured injector is built to be more durable than the original injectors.

This makes them almost immune to the most commonly reported issue with the original injectors, that they crack and get damaged easily.

This injector is also more efficient than the original. It does not leak or give way to any other contaminants.

With this injector, the oil is also directly injected into the engine on demand. This ensures the engine’s optimal performance.

With this injector, you are also entitled to a $50 refund if returned within 30 days or $37.50 if returned within two weeks.

Reman Auto Electronics Remanufactured Duramax Injector

This injector is another one that has been remanufactured according to the specifications of the original LB7 Duramax injectors.

As with the others, this injector’s body has also been reinforced. As a result, it is far more resistant to cracking and corrosion than the original.

The structure and design of the injector remain the same as the original. However, the O rings and nozzles have been replaced with new ones.

The new O rings make the injector much easier to install. The new nozzles are sturdy and are designed to ensure the oil flows and is injected properly.

With this injector, you have the option of returning the core when ordering a replacement injector. If the core is in good enough condition and is without flaws, you will be handed a $150 refund.

S&S Diesel LB7 Duramax Injector

This injector by S&S Diesel Motorsport is a game changer for any LB7 Duramax engine owners who desire more durability for their injectors without an increase in fueling.

One of the most notable features of this injector is that it uses a stock-flowing LB7 SAC nozzle. This is opposed to the obsolete VCO nozzle that is currently used on the original LB7 Duramax injectors.

The result of the new nozzle is an emissions-friendly injector that will easily outlast the original. Another benefit of this injector is that it has a much greater lifespan. It can easily last tens of thousands of more miles than the original.

Also Read: Differences Between Techron And Gumout Fuel Injector Cleaners.

Frequently Asked Questions (FAQ)

What are the best injectors for a 2004 LB7 Duramax?

The injectors by Bosch are mostly considered to be the best for LB7 Duramax engines.

When should I replace my LB7 injectors?

The original injectors of the LB7 engine are prone to cracking. You can wait until it gets damaged or get it replaced straight away to avoid any possible issues.

What fails on LB7 injectors?

The original LB7 injectors are not all that durable. This caused them to crack or corrode very easily.

How many miles do LB7 injectors last?

LB7 injectors can give you 70,000 miles or upwards of 200,000 miles.

Are 30 over-injectors worth it?

30 over injectors can give a nice performance boost to your engine.

Wrapping Things Up

The LB7 Duramax engine is a really great diesel engine that is used by two widely used and popular trucks. The engine even holds up pretty well compared to more modern diesel engines.

It is unfortunate that the original injectors perform so poorly. But any one of the alternatives here can solve any issues the original injectors may have. Hopefully, this article on the best injectors for the LB7 Duramax gave you the information you were looking for.

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