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Paccar MX13 Back Pressure Valve 2010-2013: OEM 1840166PE

PACCAR MX13 BACK PRESSURE VALVE 2010-2013: OEM 1840166PE

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$3,895.00

CORE CHARGE:

$1,000.00
iCORE DISCLAIMER: The CORE charge is a 30 day hold and will not be processed as long as the CORE is returned within 30 days. If you do not have a CORE or fail to return the CORE within 30 days, the CORE charge hold amount will be processed at that time.

AVAILABILITY IN STOCK
OEM NUMBER1840166PE
PART TYPEBack Pressure Valve
BRANDTamerx Diesel Products
ENGINE MAKEPaccar
ENGINE TYPEMX13
YEAR2010-2013
PART NUMBER1840166RM
APPLICATION NOTESEPA10

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx Back Pressure Valve, Tamerx part number 1840166RM ( OEM Part Number 1840166PE ). 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 Paccar MX13, production years 2010-2013, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM1840166PE
Additional OEM1840166PE

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490547483
WEIGHT18.00 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 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.

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.


Optimize your exhaust system with the Paccar MX13 Back Pressure Valve 2010–2013: OEM 1840166PE, engineered to help regulate back pressure for compatible MX13 engines. This valve supports proper exhaust flow, contributing to improved turbo performance and engine efficiency. Built to OEM standards, it offers a precise fit and lasting durability you can rely on. A dependable choice for maintaining smoother operation and dependable performance from your truck’s exhaust system.

FITMENT CHART

YEARMAKEENGINE(S)
2010Paccar MX13
2011Paccar MX13
2012Paccar MX13
2013Paccar MX13

PEOPLE ALSO ASKS | BLOG(S)

Controlling exhaust back pressure is a key factor in how a diesel engine operates, and the Paccar MX13 Back Pressure Valve (2010–2013, OEM 1840166PE) plays a significant role in that system. This back pressure valve helps regulate the resistance in the exhaust stream, which supports proper turbocharger function, efficient combustion, and overall engine stability. Choosing the correct OEM-grade valve ensures your engine’s exhaust and turbo systems work together smoothly for dependable performance.

This back pressure valve impacts engine operation in several important ways — here’s why it matters:

  • Regulates Exhaust Back Pressure – Adjusts resistance in the exhaust system to maintain proper airflow and support optimal engine breathing.

  • Supports Turbocharger Efficiency – Proper back-pressure balance helps the turbocharger respond accurately, improving acceleration consistency and overall efficiency.

  • Enhances Engine Stability – By keeping exhaust flow regulated, this valve helps prevent issues like uneven boost or irregular engine response.

  • OEM-Grade Compatibility and Fit – As OEM 1840166PE, this valve is built to match original equipment standards, ensuring dependable fitment and long-lasting performance.

  • Helps Prevent System Issues – A worn or malfunctioning valve can lead to exhaust restrictions, abnormal boost behavior, or derate conditions — replacing it helps avoid these problems.

A failing or restricted back pressure valve can contribute to reduced engine responsiveness, increased exhaust stress on components, and uneven performance. The Paccar MX13 Back Pressure Valve (OEM 1840166PE) delivers reliable exhaust regulation and OEM-certified quality to help keep your engine running smoothly and efficiently. For fleet operators and technicians seeking a dependable replacement, Tamerx offers high-quality parts engineered for long-lasting performance and system reliability.

The back pressure valve helps regulate exhaust flow and maintain proper exhaust pressure, especially during cold starts and emissions control operation. When this valve becomes faulty, it can disrupt exhaust flow, affect engine performance, and lead to drivability issues. Recognizing the symptoms early can help prevent further damage to the exhaust and engine systems.

Common Symptoms of a Faulty Back Pressure Valve

  • Loss of Engine Power
    A valve stuck closed can restrict exhaust flow, causing sluggish acceleration and reduced overall performance.

  • Poor Fuel Economy
    Improper exhaust pressure can reduce combustion efficiency, leading to increased fuel consumption.

  • Rough Idling or Stalling
    An improperly operating valve may cause unstable exhaust flow, resulting in rough idle or engine stalling.

  • Excessive Exhaust Smoke
    Restricted exhaust flow can cause incomplete combustion, producing visible smoke.

  • Check Engine Light or Fault Codes
    The engine control module may detect abnormal exhaust pressure and trigger warning lights or related diagnostic codes.

  • Unusual Exhaust Noises
    Whistling, hissing, or rattling sounds from the exhaust system may indicate valve malfunction.

  • Overheating Issues
    Excessive exhaust restriction can raise engine and exhaust temperatures, putting stress on components.

A faulty back pressure valve can impact engine performance, fuel efficiency, and emissions control. Addressing symptoms such as power loss, rough idling, or warning lights early helps prevent more serious engine or exhaust damage. Regular inspections and timely repairs keep your exhaust system functioning smoothly and your vehicle operating reliably.

Maintaining proper back pressure with the Paccar MX13 Back Pressure Valve 2010-2013: OEM 1840166PE helps improve combustion efficiency and throttle response. Without correct back pressure regulation, engine performance and fuel consumption can be negatively affected.

By helping the engine maintain proper back pressure, the Paccar MX13 Back Pressure Valve 2010-2013: OEM 1840166PE can support more efficient fuel combustion. Improved exhaust flow regulation often leads to more consistent fuel use.

Yes, if back pressure is not properly regulated by the Paccar MX13 Back Pressure Valve 2010-2013: OEM 1840166PE, it can lead to inconsistent combustion and excess stress on engine components. Prompt attention can help prevent further issues.

Regular inspection of the exhaust system and ensuring exhaust pathways are clear helps maintain back pressure valve performance. Keeping related components in good condition prevents premature wear.

Paccar Back Pressure Valves

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