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Mack E7 Advance Valve 2001-2007: OEM 20705890

MACK E7 ADVANCE VALVE 2001-2007: OEM 20705890

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$1,495.00

CORE CHARGE:

$250.00
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 NUMBER20705890
PART TYPEAdvance Valve
BRANDTamerx Diesel Products
ENGINE MAKEMack
ENGINE TYPEE7
YEAR2001-2007
PART NUMBER20705890RM

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx Advance Valve, Tamerx part number 20705890RM ( OEM Part Number 20705890 ). 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 Mack E7, production years 2001-2007, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM20705890
Additional OEM20705890, 805GC319

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490556089
WEIGHT4.00 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.

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.


Built to support accurate engine timing and dependable operation, the Mack E7 Advance Valve (2001–2007) OEM 20705890 is a critical component within the fuel system. Manufactured to meet original equipment specifications, it ensures precise compatibility with Mack E7 engines across the specified model years. This advance valve helps regulate fuel injection timing, allowing the engine to operate efficiently under varying load and speed conditions. Constructed from durable, high-quality materials, it is engineered to withstand the demanding environments of heavy-duty diesel applications. Ideal for technicians, fleet operators, and maintenance professionals, this OEM advance valve helps maintain consistent engine function and long-term reliability.

FITMENT CHART

YEARMAKEENGINE(S)
2001Mack E7
2002Mack E7
2003Mack E7
2004Mack E7
2005Mack E7
2006Mack E7
2007Mack E7

PEOPLE ALSO ASKS | BLOG(S)

The Mack E7 Advance Valve (OEM 20705890) is an important engine control component, and taking proper care of it can help ensure reliable operation throughout its service life. Since the advance valve works with the engine's timing and control system, its condition is closely tied to the overall health of the engine.

Rather than requiring direct maintenance, this component benefits most from keeping the supporting systems in excellent condition.

Here are some practical ways to help extend its lifespan:

  • Follow the recommended engine maintenance schedule
    • Routine servicing helps ensure the systems connected to the advance valve continue operating correctly.
  • Use clean, high-quality engine oil
    • Proper lubrication helps reduce wear on engine components that work alongside the advance valve.
  • Inspect electrical connectors and wiring
    • If the valve is electronically controlled, clean and secure electrical connections help prevent communication problems and unnecessary faults.
  • Address engine warning lights promptly
    • Fault codes related to engine timing or control should be diagnosed early before they place additional strain on the valve.
  • Check for oil or air leaks
    • Leaks within the engine system can affect overall operation and indirectly impact valve performance.
  • Keep the engine free from excessive contamination
    • Regular replacement of oil and air filters helps minimize dirt and debris that can affect engine control components.
  • Avoid delaying repairs
    • If the engine begins showing symptoms such as rough operation, poor response, or irregular timing, have the issue inspected as soon as possible to prevent further damage.
  • Use quality replacement parts during repairs
    • Components that work with the advance valve should meet OEM specifications to ensure proper system operation.

In simple terms, the best way to prolong the life of your Mack E7 Advance Valve 20705890 is to keep the engine properly maintained, inspect related electrical and mechanical systems regularly, and correct small problems before they develop into larger ones. A healthy engine provides the ideal operating environment for the advance valve to perform reliably over the long term.

Yes, a faulty advance valve can have a noticeable impact on your vehicle's operation. The advance valve helps regulate fuel injection timing, and when it doesn't function correctly, the engine may not receive fuel at the optimal moment for efficient combustion.

As the valve begins to wear or stick, engine operation can become inconsistent, leading to reduced reliability and increased strain on other fuel system components.

Here are some of the ways a faulty advance valve can affect your vehicle:

  • Hard starting
    • Incorrect fuel injection timing can make the engine more difficult to start, particularly during cold starts or after the vehicle has been sitting for an extended period.
  • Rough idling
    • A malfunctioning advance valve may cause uneven fuel delivery, resulting in an unstable or rough idle.
  • Reduced acceleration
    • Improper injection timing can make the engine feel sluggish and less responsive when accelerating or operating under load.
  • Poor fuel economy
    • When fuel isn't injected at the correct time, combustion becomes less efficient, causing the engine to consume more fuel than necessary.
  • Excessive exhaust smoke
    • Incomplete combustion caused by incorrect injection timing may produce black, white, or gray exhaust smoke, depending on the underlying issue.
  • Check engine light or fuel system fault codes
    • On electronically controlled diesel engines, the engine control module may detect timing irregularities and trigger diagnostic trouble codes.
  • Increased engine wear over time
    • Continuing to operate with improper fuel injection timing can place additional stress on internal engine components and the fuel injection system.

If you notice any of these symptoms, it's important to inspect the advance valve and the surrounding fuel system components. Addressing the problem early can help restore proper engine operation, improve fuel efficiency, and prevent more extensive repairs.

The OEM 20705890 Advance Valve, also known as the Econovance solenoid valve, helps control injection timing on compatible Mack E7 engines by regulating the engine's timing advance system.

The 20705890 Advance Valve is designed for Mack E7, E8, E-Tech, and certain ASET engine applications, including many 2001–2007 Mack E7 engines.

It is called an Econovance valve because it controls the Econovance timing system, which adjusts injection timing based on engine operating conditions.

The valve is mounted on the engine's fuel injection timing system, where it communicates with the injection pump to regulate timing advance.