By-Pass Oil Filters
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By-pass Oil Filter Mounting Kits
Engineered for Outstanding Oil Filtration Efficiency

Ea By-pass Oil Filters
Filtration Systems Application Guide
See the By-Pass Replacement Parts Lists
See customer submitted By-pass installation photos
here
Acrylic By-Pass Floor Display Stand
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PRODUCT DESCRIPTION
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.
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Typical Installation Diagram for BMK21 & BMK22 Kits.
Click on diagram for larger image
(Opens a new browser window)
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| By-Pass Filter Mounts and Instructions |
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BMK18
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BMK21
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BMK30
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AMS-Oiler™ Oil Precharger
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| Sample Kit |
Size Measurement |
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New Aluminum Billet Oil Fill and Oil Filter Caps for BMK21 By-Pass Filtration
System
AMSOIL offers
by-pass components to ease the installation of the BMK21 By-Pass Filtration System in three
popular diesel engines: the Ford 6.0L Power Stroke™, the Dodge 5.9L Cummins and the General
Motors 6.6L Duramax.
Engine compartments are becoming increasingly cramped, leaving little room for
after-market additions and improvements. The BMK21 is a single remote by-pass filter system that
fits into much smaller spaces than the AMSOIL Dual-Remote By-Pass System.
Ford 6.0L Power Stroke™ Diesels
To ease installation of the BMK21 on 2003 and later model Ford pickups equipped with the 6.0L Power
Stroke™ diesel engine, AMSOIL provides the new Aluminum Billet Oil Filter Cap (BK1101), the
Aluminum Billet Oil Fill Cap (BK1102) and the 90-degree JIC Elbow (BP242). These new high-quality
billet aluminum caps replace the original equipment manufacturer (OEM) filter cap and oil fill cap.
The new caps have holes tapped in them that accept the JIC elbows for hose connectors.
Dodge 5.9L/6.7L Cummins Diesels
To ease installation of the BMK21 in later model Dodge pickups equipped with the 5.9L and 6.7L
Cummins diesel engine, AMSOIL offers the 1/8" NPT - 1/4" JIC fitting (BP241), the Aluminum Billet
Oil Fill Cap for Dodge 5.9L Cummins diesels (BK1301) and the 90-degree JIC Elbow (BP242). The BP241
fits onto the existing plug on top of the OEM full-flow filter mount, and the addition of the
BK1301 eases the installation of the oil return line.
General Motors 6.6L Duramax Diesels
To provide GM Duramax owners the same ease of installing the BMK21, AMSOIL is now offering an oil
filter “Sandwich” adapter (BK1201).
The Sandwich adapter is an anodized billet aluminum adapter that screws on to the
present full flow oil filter nipple located on the engine block. The full flow filter is then
simply spun on to the adapter. The Sandwich adapter has an orifice to provide high-pressure oil
feed for the BMK21. Like the other diesel applications, AMSOIL now offers an Aluminum Billet Oil
Filler Cap for (BK1202) to ease the installation of the oil flow from the BMK11 back to the engine.
To complete an installation, the following components must be purchased separately:
1. Aluminum oil filter Sandwich Adapter with o-ring (BK1201)
2. Aluminum Billet Oil Filler Cap for GM Duramax (BK1202)
3. Two 90 degree JIC Elbows (BP242)
4. Single Remote By-pass system (BMK21)
5. By-pass filter (EaBP90, EaBP100, or EaBP110, as space dictates)
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Higher Efficiency
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
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.
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.
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
Dual Remote Filter System
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 G1092 brochure for more info on the Dual
Remote Filtration System.
| AMSOIL By-Pass Filter Replacement Chart |
| Type of Unit |
Stock Number |
Size (Approx.) |
Additional Oil Needed |
Crankcase Capacity |
Applications |
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SINGLE SPIN-ON ELEMENT
(Used with BMK21 or any DUAL REMOTE SYSTEM)
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EaBP90 |
Diam. = 4.5 in.
Height = 6 in.
With Mnt. = 8 in. |
1 qt. |
up to 9 qt. |
Pleasure Vehicles, Light Trucks and Smaller Commercial
Applications |
| EaBP100 |
Diam. = 4.5 in.
Height = 8 in.
With Mnt. = 10 in. |
1.5 qt. |
up to 15 qt. |
| EaBP110 |
Diam. = 4.5 in.
Height = 10 in.
With Mnt. = 12 in. |
2 qt. |
up to 21 qt. |
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DUAL SPIN-ON ELEMENT
(Used with BMK22 DUAL-GARD)
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(2) EaBP90 |
Diam. = 5 in.
Height = 5.8 in.
With Mnt. = 8 in. |
2 qt. |
15 to 18 qt. |
Large Trucks, Construction, Farm and Industrial Equipment
(minimum sump capacity = 15 qt.)
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| (2) EaBP100 |
Diam. = 5 in.
Height = 7.3 in.
With Mnt. = 10 in. |
3 qt. |
15 to 30 qt. |
| (2) EaBP110 |
Diam. = 5 in.
Height = 10.4 in.
With Mnt. = 12 in. |
4 qt. |
15 to 42 qt. |
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SPIN-ON ELEMENT
(Used with BMK30
Heavy-Duty By-Pass System)
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(1) EaBP120 |
Width = 5.35 in.
Length = 12.12 in.
Height = 17.5 in. |
4 qt. |
15 to 42 qt. |
Large Trucks, Construction, Farm and Industrial Equipment,
(minimum sump capacity = 15 qt.), the BMK30 kit can be mounted in series for sump capacities
greater than 42 quarts. |
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Normal Service Life b:When used in conjunction with AMSOIL motor oil and an 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.
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a. Filters can be used on sumps of larger capacity but then require more
frequent replacement. Full details on service life included with filter installation
instructions
b. Data determined in a non-turbo gasoline engine with AMSOIL 100%
Synthetic Motor Oil and AMSOIL Full-Flow Oil Filter. Service life varies in other engines (turbo and
diesel) and with other oils and filters.
NOTES:
1. Special adapters and hardware may be required for some installations. A
universal mounting bracket is included with the kit, however, custom brackets may be required depending on your
vehicle's equipment options or personal preferences in mounting locations."
2. Contact AMSOIL INC. Technical Service for instructions before installing on
vehicles with cast aluminum oil pans. Or call (715) 399-TECH (8324).
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By-Pass
Spin-on Adapter Kits
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Filter Thread
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AMSOIL Part #
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3/4"-16
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BK295
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13/16"-16
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BK296
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18mm x 1.5mm
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BK297
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20mm x 1.5mm
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BK298
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22mm x 1.5mm
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BK299
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1"- 16 (Cummins)
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BK300
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1 1/2" – 16 (PowerStroke 7.3L)
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BK301
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13/16" – 16 (Duramax)
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BK302
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| APPLICATIONS
(See the Filtration
Systems Application Guide) |
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Mount
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Filter (Order separately unless
noted)
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BMK21
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Any size
AMSOIL Spin-On By-Pass Filter Element
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BMK23
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Any size
AMSOIL Spin-On By-Pass Filter Element
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BMK25
(complete with filters)
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EaO26 and
EaBP100 (complete with filters)
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BMK26
(complete with filters) International
Diesels
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EaO26 and
EaBP100 (complete with filters) and spin-on adapter
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BMK27
(complete with filters) Duramax Diesels
(in GM Pick-ups)
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EaO26 and
EaBP100 (complete with filters) and spin-on adapter
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Vehicles with
sump capacities greater 15 qts.
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Mount
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Filter
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BMK22 Dual
Gard
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Any size
AMSOIL Spin-On By-Pass (mount requires 2 filters)
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