Rajan Wilcox
If you're looking to rebuild the fuel filter housing on your 05 Duramax, you're likely dealing with a leak. The most common cause of leaks is a cracked filter head, but it could also be due to worn seals or failing O-rings. Rebuilding the housing is a more cost-effective option, with kits ranging from $10 to $25, but it requires time and effort, and there's a risk of failure. On the other hand, replacing the entire housing costs around $120 and comes with new components, ensuring better performance and longevity. Ultimately, the decision depends on your budget, time availability, and willingness to take on the repair work yourself.
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What You'll Learn
Cost of rebuilding vs. replacing
The cost of rebuilding a fuel filter housing for a Duramax engine varies depending on the approach taken. Some people opt for a rebuild kit, which typically costs around $25, while others choose to replace individual components like O-rings, which can cost around $20.
On the other hand, replacing the entire fuel filter housing can cost around $120, and this option often includes a new filter, heater, harness, and other components.
When deciding between rebuilding and replacing, several factors come into play. Firstly, rebuilding can be more cost-effective, especially if the issue can be resolved with a simple kit or a specific component replacement. It can also be a rewarding project for those with mechanical skills and the time to dedicate to the task. Online resources and videos are available to guide individuals through the rebuilding process.
However, rebuilding carries the risk of failure, and there may be underlying issues with other internal parts that are worn or dirty. Additionally, there have been cases of cracks or leaks developing in the original filter head, which can lead to further complications.
Replacing the entire fuel filter housing offers a more straightforward solution, providing peace of mind that all components are new and reducing the likelihood of future issues. The factory OEM unit is expected to work "like a new one" and last for at least ten years, making it a more appealing option, especially for those who haven't worked on their trucks before.
Ultimately, the decision depends on individual preferences, budget constraints, and the level of comfort with performing mechanical repairs. While rebuilding can be more affordable upfront, replacing ensures newer parts and potentially reduces the chances of being stranded with vehicle problems.
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Deluxe rebuild kits
The Merchant Automotive Deluxe Fuel Filter Head Rebuild Kit, with part number 10218, is specifically designed for the GM 6.6L Duramax engine. It includes a billet WIF plug, billet bleeder screw, OE valley feed block-off plug, and all the required gaskets and seals for a successful rebuild. This kit eliminates the hassle of locating individual components and ensures a proper rebuild.
However, it's important to consider the time and effort involved in the rebuild process. It requires careful attention to detail and carries a risk of failure if not executed properly. Additionally, there may be concerns about other worn or dirty internal parts, which could impact the overall performance and reliability of the fuel system.
When deciding between a deluxe rebuild kit and a complete replacement, it's essential to weigh the benefits of cost savings and thorough maintenance against the potential drawbacks of time investment and the possibility of future issues. Ultimately, the decision depends on individual preferences, mechanical skills, and the specific needs of the vehicle.
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Common issues with fuel filter head
The fuel filter head in Duramax trucks can present several issues, especially in high-mileage vehicles. One of the most common problems is the development of air leaks in the fuel filter head assembly, which can cause the fuel system to lose its prime. This can lead to extended cranking after the truck has been sitting for long periods, and the engine may start and then die. As the issue worsens, the truck may not restart unless manually primed when parked on an incline.
The root cause of these air leaks is often attributed to the O-rings in the filter head assembly. Over time, and with the use of ULSD and biodiesel fuels, the O-rings can degrade and allow air to bleed into the system. This results in a loss of vacuum, causing the engine to gulp air and leading to the described symptoms.
Another issue with the fuel filter head is the Water in Fuel (WIF) sensor. This plastic component can crack, especially as it ages and becomes brittle, providing another entry point for air into the system. Additionally, the filter head itself may crack, further exacerbating the problem.
To address these issues, several repair kits are available, such as those offered by Merchant Automotive. These kits range from basic O-ring replacements to comprehensive master kits that include billet aluminium WIF plugs, filter head spacer kits, bleeder screws, and replacement fuel filters. It is recommended to consult with specialists, such as Merchant Automotive or local diesel performance shops, for specific repair advice.
Furthermore, the rubber fuel lines in the intake side of the fuel system may collapse when demanding more fuel, especially in colder temperatures. This can be addressed by replacing the rubber lines with more durable alternatives or following service bulletins on the issue.
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How to identify if a rebuild is needed
The fuel filter housing is the number one point of failure in the GMT 800 series of trucks. There are several ways to identify whether your 05 Duramax fuel filter housing needs to be rebuilt.
One common issue is the loss of prime, which can occur when the truck is left parked uphill overnight. This can be caused by worn seals in the fuel filter head, which can lead to air leaks and cause the engine to stall. Another issue is external or internal fuel leaks, which can be caused by bad seals or a failing O-ring. If you notice any leaks, it is recommended to replace the O-ring or the entire seal kit.
In some cases, the fuel filter housing may start to leak from the wiring at the top of the housing, or the screw nut for venting excess air may not have a good seal. It is also possible that the filter was not installed correctly, which can cause leaks.
If you are unsure whether your fuel filter housing needs to be rebuilt or replaced, it is recommended to consult a mechanic or a professional Duramax forum for more specific advice.
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Where to buy replacement parts
When it comes to purchasing replacement parts for your 05 Duramax fuel filter housing, there are a few options available. Firstly, you can opt for buying a seal kit, which typically costs around $10 to $40, depending on the retailer. This can be a cost-effective solution if you're looking to rebuild the fuel filter housing yourself.
If you're looking for a more comprehensive replacement, you can purchase the entire assembly with a new filter for around $120. This option offers a quick fix without the need for rebuilding, and it includes additional components such as a new heater, harness, and filter.
There are various retailers and websites where you can source these parts:
InjectorsDirect.com
This website offers a Duramax Fuel Filter Head Rebuild Kit, which includes all the necessary seals for rebuilding the fuel filter head. This option is suitable if your filter head is leaking or losing prime, and it provides an economical solution compared to purchasing a new filter head assembly.
Amazon.com
Amazon offers a range of Duramax fuel filter housing parts and kits through various sellers, such as Parts Synergy, Inc. You can explore different options and compare prices on their website.
Local Hardware Stores
Some individuals in the Duramax community have mentioned sourcing parts from local hardware stores. This can be a convenient option if you prefer in-person shopping and have knowledgeable staff to assist you in selecting the right parts.
OEM and Factory Options
If you prefer original equipment manufacturer (OEM) or factory parts, these are available directly from the manufacturer or authorized dealers. While these options can be more expensive, they often come with assurances of quality and longevity.
When deciding where to buy replacement parts, it's essential to consider factors such as price, convenience, and the reputation of the seller or retailer. Reading reviews and comparing prices from multiple sources can help you make an informed decision.
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Frequently asked questions
The cost of rebuilding the housing is $25 for a kit.
It costs $120 to replace the entire housing.
The kit includes all the seals needed to rebuild a leaking fuel filter head.
The replacement includes a new filter, a new heater, a new harness, and new plastic housing.
Rebuilding the housing is cheaper and may last another 10 years. However, replacing ensures all parts are new and will likely last at least 10 years.
