AMSOIL BMK-25 Dodge Cummins Oil Bypass Unit
 BMK-25 Dodge Cummins Oil Bypass Unit

*** AMSOIL BMK25 is discontinued effective January 2012

Please use AMSOIL BMK21 General Use Single Remote Bypass Kit as the alternative replacement for AMSOIL BMK25.

The AMSOIL Dual Remote By-Pass Filtration System for Dodge Cummins Diesels (BMK25) is discontinued effective immediately. In isolated cases, on-board diagnostics (OBD) systems have indicated low oil pressure in Dodge diesels with this system in place. Newer diagnostics systems are more sensitive to oil pressure fluctuations, giving warnings at earlier levels than before. Although testing reveals engine protection is not compromised and sufficient oil pressure is maintained in applications where the system is installed properly, it is discontinued in order to reduce customer concerns. Customers using the BMK25 who have not seen a low pressure indicator are encouraged to continue using it. Going forward, the AMSOIL Single Remote By-Pass Mounting Kit (BMK21) is recommended in place of the BMK25.

Product Code: BMK25 • Brand: AMSOIL

Data Sheet

Product Details Reviews & Rating

Product Description
The AMSOIL Dual Remote Oil Filtration System converts an engine’s full-flow oil filter system into a full-flow/by-pass oil filtration system by attaching an AMSOIL Full-Flow Oil Filter and AMSOIL Spin-On By-Pass Oil Filter onto a remote mount. The Dual Remote System provides superior filtration efficiency, increased oil capacity and improved oil filtration accessibility. See the brochure for more info on the Dual Remote Filtration System.

The Ea By-Pass Oil Filter (EaBP) provides the best possible filtration protection against wear and oil degradation. Working in conjunction with the engine’s full-flow oil filter, the AMSOIL Ea By-Pass Filter operates by filtering oil on a “partial-flow” basis. It draws approximately 10 percent of the oil pump’s capacity at any one time and traps the extremely small, wear-causing contaminants that full-flow filters can’t remove. The AMSOIL Ea Bypass Filter typically filters all the oil in the system several times an hour, so the engine continuously receives analytically clean oil.

By-Pass Filtration Benefits:
• Dramatically Extended Drain Intervals
• Improved Oil Cooling
• Increased Filtration Capacity and Life
• Increased Fluid System Capacity
• Efficient Small Particle and Soot Removal
• Significantly Extended Engine Life
• Equipment Constantly Runs on Clean Oil
• Increased Engine Efficiency
• Remove Particles Less Than One Micro

Higher Efficiency
Oil filtration is critical to engine life. Abrasive particles in dirty oil can quickly destroy critical components and ruin precision clearances in an engine if not removed through filtration. Today’s engines, however, are designed with smaller, lower-capacity oil filters which are harder to get to for servicing. This means less efficient filtration and a reluctance to change filters at regular intervals, leading to a build-up of dirt in the oil.

The AMSOIL Dual Remote Oil Filtration System is designed to provide superior filtration efficiency, increase oil capacity and improve oil filter accessibility.

AMSOIL EaBP Filters have an efficiency of 98.7 percent at two microns. At normal operating RPMs the EaBP Filter will filter all of the oil in a typical five quart sump in less than 10 minutes.

Superior Filtration Efficiency
A vehicle’s regular oil filter is a fullflow filter. This means that all the oil pumped by the engine must pass quickly through the filter before it reaches the engine. This high flow demand limits the size of particles conventional filters can effectively remove. Particle size is measured in units called microns.

A decent full-flow filter will effectively remove particles down to about 25 microns. But studies have shown that over 60 percent of all engine wear is caused by particles in the 5 to 20 micron range. AMSOIL Ea By-Pass Oil Filters remove particles less than one micron, keeping the oil free of virtually all wear-causing particles.

The dual remote system combines both full-flow and by-pass filtration on one convenient mount. With this system, all the oil is super-filtered, and more often.

Superior Construction
The superior construction of AMSOIL EaBP Filters provides better sealing and increased longevity along with superior corrosion resistance. AMSOIL EaBP Filters have a marine powder coated exterior; and their zinc-dichromate base plates increase rust protection. EaBP Filters have a nitrile HNBR gasket and an orange silicone anti-drain valve. The two stage pleated and layered cellulose/full synthetic media has an efficiency rating of 98.7 percent at two microns.

Longer Lasting
When used in conjunction with AMSOIL motor oil and an AMSOIL EaO or Donaldson Endurance™ filter, the EaBP should be changed every other full-flow filter change up to 60,000 miles. When used with other brands of motor oil or full-flow filters, the EaBP Filter should be changed every other full-flow filter change. AMSOIL recommends using oil analysis when extending oil drain intervals.

Increased Oil Capacity
The increased fluid system capacity and filtration life provides improved oil cooling and ensures that equipment constantly runs on clean oil. Engine efficiency is increased, providing extended engine life.

Increased Filter Size
Many auto manufacturers have been using smaller full-flow filters to help squeeze their engines into tighter engine compartments. But reducing a filter’s size severely limits its service life and contaminant-holding capacity.

The dual remote mount moves the oil filter away from a tight-fitting area of the engine compartment into one
where more room is available. In many installations, it is very likely that a much larger full-flow filter can be used. A larger full-flow filter allows for better oil flow, increases dirt holding capacity and provides longer service life than a smaller filter does.

Soot Removal
AMSOIL has designed a high-efficiency by-pass filter element that is also a soot removal device. AMSOIL Ea By-Pass Filters use a synthetic/cellulose sandwiched media. The inner layer of the element is composed of a highly efficient cellulose media covered with a full synthetic media outer layer. These filters remove 39 percent of soot contaminants less than one micron. Soot removal efficiency increases approximately 10 to 14 percent when the EaBP Filter is used in conjunction with a standard full-flow filter.

Improved Accessibility
The dual remote mount is designed to make filter changes easy and convenient. It accomplishes this by using a remote filter mount that is easily installed in an accessible area of the engine compartment.

The mount is connected to the engine block by two oil lines and a special spin-on oil filter adapter. The spin-on adapter replaces the engine’s full-flow filter, using machined thread adapters that allow the dual remote system to fit about 98 percent of all car and light truck applications in the United States. Ports in the adapter provide both a source of oil and a place to return it to the engine.

Minimum Area Needed For Dual Mount and Spin-on Oil Filter Elements

Area Required to Install BMK 25

Typical Installation Diagram for BMK25
For Complete Installation Instructions for Dodge Cummins Oil Bypass Unit Please Refer:

BMK25 Installation and Servicing Instructions (PDF 1.1MB)

Dual By Pass Installation Diagram

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