
Cummins ISF3.8 High Pressure Fuel Pump 2014-2021: OEM 5264248
CUMMINS ISF3.8 HIGH PRESSURE FUEL PUMP 2014-2021: OEM 5264248

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a Remanufactured Tamerx High Pressure Fuel Pump, Tamerx part number 5264248RM ( OEM Part Number 5264248 ). All parts are proudly remanufactured in the U.S.A. to the highest of OEM standards, and improvements are often applied to the original design in the remanufacturing process. This part is primarily made for a Cummins ISF3.8, production years 2014-2021, and comes with a One Million Miles or One Year Warranty.
OEM NUMBERS
| Primary OEM | 5264248 |
| Additional OEM | 5264248 |
ADDITIONAL DETAILS
| CONDITION | Remanufactured |
| UPC / Barcode | 00840490558113 |
| WEIGHT | 18.00 LBS |
SHIPPING OPTIONS
Ship Weight : 18.00 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 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, 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 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.
The customer, or parts buyer, is responsible for any shipping costs associated with core returns unless otherwise specified in the product listing/detail page. Tamerx Diesel Products offers prepaid UPS shipping labels (SKU numbers UPS-CR1 and UPS-CR2) for use in returning your core that are available for purchase on our website during your shopping/order process.
The shipping label you will need to use for the core return is dependent upon what part you are purchasing. UPS-CR1 is good for cores weighing up to 20 pounds. UPS-CR2 is appropriate for shipping cores weighing 21 pounds or more. You must include enough information with the core return that clearly identifies it as a.) a Core Return, and b.) contains enough information we can use to clearly associate the core return with your order. Including a copy of the invoice or packing slip that came with the original shipment, clearly marked "Core Return", is ideal. Alternately, you can include a note marked as "Core Return" that includes your order number, full name and address, and phone number or other contact information. Failure to include this information with your returned core will most likely delay any due core credit being issued and/or delay any applicable warranty activation. Core returns need to be for the exact part purchased and cannot be damaged. Substituting another part in place of the part you have purchased is not acceptable.
All fluids must be drained.
If you have purchased a set or a parts package, you will need to return cores for all components of the set. For example, if you have purchaed a high pressure oil pump with an IPR valve, you will need to return both HPOP and IPR valve cores to receive proper credit. If you have purchased an EGR cooler/EGR valve package, your core return must consist of an EGR cooler core and an EGR valve core, or core credit will not be given.
Core Charges are often mandated by state legislature, and, as such, the actual core charge and taxes on the charge may vary depending on the state in which you buy your part. The Tamerx Diesel Products core charge presented to you online today with your item is representative of the most common core charge.
Power your fuel injection system with this Cummins ISF3.8 High Pressure Fuel Pump for 2014–2021 applications. OEM 5264248 delivers pressurized fuel to the fuel rail for consistent injection and proper engine operation. A dependable replacement for worn, damaged, or faulty fuel pumps in compatible Cummins ISF3.8 engines.
FITMENT CHART
| YEAR | MAKE | ENGINE(S) | ||||
|---|---|---|---|---|---|---|
| 2014 | Cummins | ISF3.8 | ||||
| 2015 | Cummins | ISF3.8 | ||||
| 2016 | Cummins | ISF3.8 | ||||
| 2017 | Cummins | ISF3.8 | ||||
| 2018 | Cummins | ISF3.8 | ||||
| 2019 | Cummins | ISF3.8 | ||||
| 2020 | Cummins | ISF3.8 | ||||
| 2021 | Cummins | ISF3.8 | ||||
PEOPLE ALSO ASKS | BLOG(S)
A common-rail diesel injection system relies on a high-pressure fuel pump to deliver pressurized fuel to the rail before it reaches the injectors. The Cummins ISF3.8 High Pressure Fuel Pump 2014-2021: OEM 5264248 plays an essential role in generating the fuel pressure required for controlled injection, helping the system respond to changing fuel demands during normal engine operation.
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OEM 5264248 is intended for compatible 2014-2021 Cummins ISF3.8 diesel applications.
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High-pressure fuel delivery compresses incoming diesel fuel before supplying it to the common-rail system.
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Mechanical pumping operation uses internal pumping components to generate the pressure required for fuel injection.
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Precision internal components help maintain controlled fuel compression throughout repeated pumping cycles.
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Common-rail compatibility allows the pump to supply pressurized fuel to the rail for distribution to individual injectors.
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Durable metal housing provides structural protection for internal components exposed to demanding fuel-system conditions.
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Application-specific fuel connections help maintain proper fuel routing between the pump and compatible injection components.
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Direct replacement configuration provides a suitable option when the original high-pressure fuel pump becomes worn, damaged, or unable to generate the required fuel pressure.
The Cummins ISF3.8 High Pressure Fuel Pump OEM 5264248 provides the fuel compression and delivery needed for proper common-rail injection system operation. Customers searching for a Cummins ISF3.8 high-pressure fuel pump, ISF3.8 diesel injection pump, common rail fuel pump, diesel high-pressure pump, or OEM 5264248 replacement can use this application-specific component for compatible 2014-2021 applications.
Sudden High Pressure Fuel Pump failure can occur even when a diesel engine has shown little or no noticeable warning beforehand. Although many fuel pump problems develop gradually, internal wear, contamination, or mechanical damage can sometimes cause unexpected fuel pressure loss and prevent the engine from operating properly.
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Sudden pressure loss: Internal pump damage can cause fuel rail pressure to drop unexpectedly, resulting in engine stalling or a no-start condition.
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Internal component failure: Worn or damaged pump components may fail without producing obvious symptoms during normal operation.
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Fuel contamination: Water, dirt, or metal particles can damage sensitive pump components and accelerate unexpected failure.
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Hard starting: A weakening High Pressure Fuel Pump may occasionally struggle to generate sufficient pressure during engine cranking.
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Intermittent power loss: Early pump problems may cause brief hesitation or reduced engine power that is difficult to recognize.
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Check engine light: Fuel pressure-related fault codes may appear when the ECM detects abnormal rail pressure, but a warning light may not appear before failure.
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Poor lubrication: Inadequate fuel lubricity or contaminated diesel fuel can increase internal friction and contribute to premature pump damage.
A High Pressure Fuel Pump can fail without clear warning signs, making proper fuel system maintenance especially important. Using clean diesel fuel, replacing fuel filters at recommended intervals, and investigating unusual fuel pressure readings can help reduce the risk of unexpected pump failure and costly fuel system repairs.
The pump must supply sufficient high-pressure fuel as engine demand increases. If it cannot maintain the required pressure, the engine may experience hesitation, sluggish acceleration, or reduced power.
Possible causes include internal pump wear, inadequate fuel supply, air entering the fuel system, or a malfunctioning fuel metering component. Diagnostic testing is necessary to identify the actual problem.
A malfunctioning fuel metering valve can interfere with the amount of fuel entering the high-pressure pumping mechanism. This may cause unstable rail pressure, starting difficulties, or poor engine operation.
Metal particles can damage the pump's precision internal components and sealing surfaces. If pump wear generates metallic debris, other common rail components may also require inspection for contamination.

