Sylvie Willis
The LBZ Duramax engine is a diesel engine produced by General Motors for use in Chevrolet and GMC trucks. While the LBZ does not have an electric fuel pump stock, it is still necessary to change the fuel filter. Owners of the LBZ Duramax engine have debated the best fuel filter to use, with some opting for OEM filters, while others have chosen aftermarket filters such as the WIX, Donaldson, or FASS Platinum lift pump and filter system.
Characteristics and their values regarding the Duramax LBZ fuel filter:
| Characteristics | Values |
|---|---|
| Fuel Filter Replacement | WIX, P551313 Donaldson Fuel Filter, CAT 1R-0750, FASS Platinum lift pump and filter system |
| Fuel Filter Brands | Racor, Napa, AMSOIL, Mobil 1, ACDelco, Rotella T6 |
| Fuel Filter Issues | Truck won't start, need to bleed the fuel filter, low fuel rail pressure, fuel pressure low during power enrichment |
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What You'll Learn
Racor fuel filter
The Racor fuel filter is a filtration product offered by Parker Racor. They also manufacture accessories, replacement parts, and other filter products.
The Racor fuel filter is a popular choice for fuel filtration, with many users opting for it over other brands. One user recommends Racor, noting that they "make the ac Delco" filters.
Parker Racor offers a range of fuel filtration products, including the Green Max series, the FBO Series Filter Elements, and the DVX and DVF Filter Vessels. They also provide a variety of accessories, such as the Filter Pump, Filter Carts, and the LITERATURE Fuel Dispensing system.
The Racor fuel filter is designed to effectively filter fuel, ensuring that the engine receives clean fuel and minimizing the risk of engine damage or performance issues caused by contaminated fuel. It is important to regularly change the fuel filter, as part of routine maintenance, to maintain optimal engine performance and fuel efficiency.
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WIX fuel filter
WIX Heavy Duty Fuel Filters are specifically designed for diesel-powered and heavy-duty equipment, which are more susceptible to harmful contaminants such as dirt, rust, scale, and water. These filters feature QuickVent® water-removal capabilities for efficient fuel/water separation, which is vital for protecting injectors and carburetors from malfunction or deterioration.
WIX's NanoPro® media technology further enhances the removal of contaminants from the fuel mix, providing superior protection in extreme conditions, such as farming, construction, and mining.
Some owners of Duramax LBZ engines have opted to use WIX fuel filters, but there are mixed reviews. While some have expressed concerns and considered returning the product, others have found success in using WIX filters alongside other products, such as T6 and ACDelco fuel filters. Ultimately, there are a variety of options available for fuel filters, and the best choice depends on individual preferences and specific vehicle requirements.
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FASS Platinum lift pump and filter system
For owners of the Chevy and GMC Duramax LBZ engine, it is recommended to install an aftermarket fuel filter. The LBZ engine does not have an electric fuel pump stock, which means that the injection pump is sucking fuel directly from the tank. This can lead to low fuel rail pressure and low fuel pressure during power enrichment, causing the truck to go into a fail-safe mode.
One popular solution is to install the FASS Platinum lift pump and filter system. FASS (short for Fuel Air Separation System) is an American manufacturer of fuel pumps and filters for diesel engines. Their products are designed to separate air, water, dirt, and debris from diesel fuel, improving the performance and longevity of diesel engines.
The FASS Platinum lift pump is a high-quality aftermarket filtration system that utilizes FASS' whisper technology, which reduces pump noise while improving pump life, flow rate, and service life. The system also features improved fuel filtration of 3 microns or better, fuel delivery rates of 100-290 gallons per hour, and a built-in water separation filter. In addition, FASS fuel systems feature a patented air/vapor removal process, ensuring that your engine receives clean, uncontaminated fuel.
The FASS Platinum lift pump and filter system is an excellent choice for Duramax LBZ owners looking to upgrade their fuel system and improve the performance and longevity of their engine. While there are other aftermarket fuel filters available, the FASS system's superior filtration, quiet operation, and durability make it a top choice for diesel enthusiasts.
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Donaldson Fuel Filter Replacement
When it comes to fuel filters for the Duramax LBZ engine, there are a variety of options available, including aftermarket alternatives. The stock fuel filter for the Duramax LBZ engine does not have an electric fuel pump, which means that the injection pump draws fuel directly from the tank.
One popular aftermarket option for the Duramax LBZ engine is the FASS Titanium Series fuel filter. It is designed to improve fuel flow and filtration, and it includes a built-in water separation system to help protect the engine from water contamination.
Another aftermarket option for the Duramax LBZ engine is the Donaldson fuel filter replacement. The Donaldson fuel filter is a direct replacement for the stock fuel filter and offers improved filtration and water separation capabilities. The Donaldson fuel filter has specifications that are nearly identical to the stock fuel filter, with a 4-micron rating and 95% emulsified water efficiency. It is also available with a 3-micron rating and a water drain, offering even better filtration performance. The Donaldson fuel filter replacement is designed to fit the Duramax LBZ engine without any adaptations, making it a straightforward upgrade.
The Donaldson fuel filter replacement for the Duramax LBZ engine offers several benefits. Firstly, it provides enhanced fuel filtration, ensuring that contaminants and water are effectively removed from the fuel before it reaches the engine. This can help improve engine performance, fuel efficiency, and longevity. Secondly, the Donaldson fuel filter is designed to be a cost-effective solution, offering comparable or superior performance to other fuel filters at a more affordable price. Finally, the Donaldson fuel filter is easy to install, making it a convenient upgrade for Duramax LBZ owners who are looking to improve their fuel system without significant modifications.
When considering a fuel filter replacement for the Duramax LBZ engine, it is important to take into account the specific needs and characteristics of your vehicle. While some owners prefer to stick with the OEM fuel filter, others opt for aftermarket alternatives like the FASS or Donaldson fuel filters to enhance performance and protect their engine. Ultimately, the decision depends on factors such as cost, ease of installation, and the level of filtration and water separation required for your particular application.
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Priming the fuel filter
To prime the fuel filter on a Duramax LBZ, you must first locate the hand primer button on top of the fuel filter. Push this button down until it becomes difficult to push further. Then, use a screwdriver to crack the bleeder, which is a hex-headed plastic cap with a screwdriver slot. Keep hand-pumping the button and cracking the bleeder until no more air is visible.
Next, locate the fuel test port, which resembles a giant-sized tire valve, on the passenger side of the engine. Hand-pump and bleed air out of this port. Continue hand-pumping until the primer button becomes difficult to push again, then start the engine.
It is important to remember to open the air bleed screw when priming a new fuel filter. If this step is forgotten, the truck may not start due to trapped air in the system. In this case, the hand primer and bleed screw can be used to bleed the system, and then the process can be repeated.
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Frequently asked questions
You can use a WIX, Donaldson, or CAT filter. You can also use a FASS Platinum lift pump and filter system, or a stock Racor filter.
You can buy fuel filters for your Duramax LBZ at O'Reilly's, Amazon, or from a diesel shop.
It is recommended to change the fuel filter in your Duramax LBZ every 400,000-800,000 miles. However, some people recommend changing it more frequently, such as every 5,000 miles or 1,500 miles.
