Cummins QSF3.8, QSF4.5 Fuel Rail 2017-2022: OEM 5344767
CUMMINS QSF3.8, QSF4.5 FUEL RAIL 2017-2022: OEM 5344767
ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY
WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a Genuine New, Tamerx Fuel Rail, Tamerx part number 5344767TX ( OEM Part Number 5344767 ).This part is primarily made for a Cummins QSF3.8, QSF4.5, production years 2017-2022, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here
OEM NUMBERS
| Primary OEM | 5344767 |
| Additional OEM | 5344767 |
ADDITIONAL DETAILS
| CONDITION | Genuine New |
| UPC / Barcode | 00840490547735 |
| WEIGHT | 4.00 LBS |
SHIPPING OPTIONS
Ship Weight : 4.00 LBS
UPS Ground, 2nd Day Air, Next Day Air
SHIPPING POLICY
Tamerx Diesel Products ships via UPS Ground. Next day air shipping can be arranged for a reasonable price of anywhere from $50.00 - $100.00 depending on the weight of the product and your location. We will do everything we can to make sure that you get the service you need. We understand how important it is to receive your order as quickly as possible.
In most cases Tamerx Diesel Products only needs one address, as long as your product is shipping to the same location as your billing information. In order to eliminate credit card fraud, your billing information must match the credit card you provide.
The terms, conditions, and details of our warranty vary from product to product. Specific warranty details can be found below.
Tamerx Diesel Products provides a replacement warranty on all of our parts. The duration and mileage limitations of the warranty vary by product and are specified on the product's detail page/item listing.
Please note that the warranty covers replacement of the part and the cost of shipping the replacement part to you only. It does not cover any shop, labor, towing, or any similar or related costs. This is not a "money back guarantee".
If you experience a problem with your part or it is not functioning properly, the correct warranty procedure is to call us at (510) 257-1777 (8:00 AM - 5:00 PM ET Monday through Friday). Be sure to have your order number and/or other relevant order information ready so we can easily locate your order and resolve your issue as quickly as possible. From that point, we will review with you any troubleshooting steps that may need to be taken and other areas or systems that can be checked to rule out external problems contributing to your part's issue. If a replacement is determined to be necessary, we will then arrange for your replacement part to ship out ASAP and issue any necessary return shipping labels and/or documents.
As is the case for the majority of the diesel products sold on Tamerx Diesel Products, your part's warranty is active as soon as you install it. In some other cases, warranty activation is contingent upon you sending us your core (i.e., your old part). Tamerx Diesel Products will provide you a return shipping label for parts that have a warranty with a core return condition. When we have received your core return, the part's warranty coverage begins. We reserve the right to void the product warranty if your core is not received within the allotted time, or if it isn't received at all. If the warranty for the diesel part you are purchasing has a core return requirement, it will be clearly noted on the product detail page/item listing.
What is a Core Charge?
A core charge (also called "core deposit") is similar to the deposit you might pay for a can or bottle of soda and is a standard requirement in the auto parts industry. For example, in many states, to promote recycling, you pay a deposit when you purchase a can of soda and receive your deposit back when you return the empty can. Many automotive parts have a core charge, or core price, that works in essentially the same way as a soda can deposit.
30 Day Core Charge Hold
You authorize Tamerx Diesel Products, to hold your credit card for the specified core charge amount and that you agree to return your core with 30 days of receiving the purchased part. When we have received your core return, the hold is released and the core charge payment is canceled.
"This Product Doesn't Have a Core"
Consistent fuel distribution is essential for proper engine operation, and the Cummins QSF3.8, QSF4.5 Fuel Rail 2017–2022, OEM Part Number 5344767, is designed to meet that demand. Built for compatibility with select QSF3.8 and QSF4.5 engine applications, this fuel rail evenly channels fuel to each injector to support stable combustion. Manufactured to OEM specifications, it provides precise fitment and durable construction for demanding industrial and equipment use. A damaged or leaking fuel rail can lead to irregular fuel delivery, hard starting, or injector-related concerns, making timely replacement critical. Tamerx Diesel Products LLC offers dependable diesel components to help keep your Cummins engine running reliably and efficiently.
FITMENT CHART
| YEAR | MAKE | ENGINE(S) | ||||
|---|---|---|---|---|---|---|
| 2017 | Cummins | QSF3.8 | QSF4.5 | |||
| 2018 | Cummins | QSF3.8 | QSF4.5 | |||
| 2019 | Cummins | QSF3.8 | QSF4.5 | |||
| 2020 | Cummins | QSF3.8 | QSF4.5 | |||
| 2021 | Cummins | QSF3.8 | QSF4.5 | |||
| 2022 | Cummins | QSF3.8 | QSF4.5 | |||
PEOPLE ALSO ASKS | BLOG(S)
Proper maintenance of your Cummins QSF3.8 and QSF4.5 Fuel Rail OEM 5344767 is essential for maintaining stable fuel pressure and reliable engine operation. The fuel rail stores and distributes high-pressure fuel to the injectors, so keeping the fuel system clean and properly serviced is critical.
Because the rail operates under extremely high pressure, even small contaminants or leaks can affect performance.
To properly maintain your Cummins fuel rail:
- Replace fuel filters at manufacturer-recommended intervals
- Use clean, high-quality diesel fuel from reputable sources
- Drain water separators regularly
- Inspect high-pressure fuel lines for leaks or damage
- Check rail pressure sensors and wiring connections
- Address fault codes related to fuel pressure immediately
Clean fuel is essential because debris or water contamination can damage internal components and affect pressure stability. Contaminated fuel may also impact injectors connected to the rail.
It’s also important to maintain the high-pressure pump. If the pump develops wear or pressure irregularities, it can place additional stress on the fuel rail and connected components.
Avoid loosening high-pressure fuel lines unless performing proper service procedures, as incorrect handling can introduce air or contamination into the system.
By keeping the entire fuel system clean, monitoring pressure-related warnings, and performing routine inspections, you can help extend the service life of your Cummins QSF3.8 and QSF4.5 Fuel Rail OEM 5344767 and maintain dependable engine performance.
The fuel rail delivers pressurized fuel from the pump to the injectors. Because it operates under very high pressure, even small problems can lead to noticeable engine issues.
One of the most common signs of a bad fuel rail is unstable fuel pressure.
When the fuel rail begins to fail, you may notice:
- Hard starting or extended cranking
- Rough idle
- Engine misfires
- Sudden stalling
- Loss of acceleration
- Check engine light with fuel pressure codes
- Strong fuel odor near the engine
In some cases, the fuel rail can develop internal cracks or external leaks. Visible fuel leakage is a serious concern and should be addressed immediately.
A failing fuel rail pressure sensor can also cause similar symptoms. If the sensor sends incorrect readings to the engine control module, fuel delivery may become inconsistent.
Because the high pressure fuel system works as a complete unit, proper diagnosis is essential. A technician will test fuel pressure, inspect for leaks, and review fault codes before confirming whether the rail itself is the issue.
Addressing the problem early helps protect injectors and other critical fuel system components.
Yes, the Cummins 5344767 is designed to work seamlessly within the engine’s high-pressure common rail system feeding the injectors.
Yes, professional installation helps ensure correct fuel line connections and pressure verification after install.
Yes, issues with the fuel rail can lead to uneven fuel distribution and trigger diagnostic trouble codes related to fuel delivery.
Using the correct OEM 5344767 ensures compatibility with Cummins’ high-pressure fuel system and helps maintain proper injection delivery across all cylinders.
Cummins Fuel Rails
