See By-Pass Installation Samples
BMK30 Installation and Servicing Instructions
By-pass oil filtration features a secondary filter with the purpose of eliminating nearly all
contaminants from motor oil. By-pass filters have high capacities and eliminate much
smaller particles than full-flow filters, including soot. By-pass filters reduce engine wear
and increase oil volume, but their high efficiencies mean they also have higher restriction
and must be used in conjunction with a full-flow filter.
By-pass filters operate by filtering oil on a "partial-flow" basis. They draw approximately
10 percent of the oil pump's capacity at any one time and trap the extremely small,
wear-causing contaminants that full-flow filters can't remove. By-pass filters have a high
pressure differential, causing the oil to flow through them very slowly and allowing for
the removal of smaller contaminants. It is called by-pass filtration because the oil flows
from the by-pass filter back to the sump and by-passes the engine. This continual process
eventually makes all of the oil analytically clean, reduces long-term wear and can
dramatically extend drain intervals.
AMSOIL Heavy-Duty By-Pass Filtration System
The AMSOIL Heavy-Duty By-Pass Filtration System includes all necessary hose-end
fittings and mounting bolts, but the filter, hose and engine adapter must be purchased
separately. The hose and engine adapters are not included due to the kit's high variability
of application, resulting in varied mounting locations, hose lengths and engine
adapter sizes. Prior to installation, determine where the filter mount will be located and
how much hose will be necessary to complete the installation. The installer must also
determine the size of the high- and low-pressure ports in order to determine which
engine adapters to purchase. Hose is available by the foot from AMSOIL (BP250), and
adapter fittings can be purchased from any hydraulics or heavy-duty equipment outlet.
High-Quality, Durable Construction
The Heavy-Duty By-Pass Filtration System is constructed of high-quality cast aluminum
with a steel filter spud that has been thoroughly tested in on-road and severe off-road
service. The mount is finished with a thick layer of powder-coated paint to provide
maximum resistance to the degrading effects of road salt, debris and engine-compartment
Compatible with Very Large Engines
Heavy-Duty By-Pass Filtration Systems can be plumbed in a series to provide
maximum filtration protection for large V12 and V16 engines. The filter mount features
a 3/8 NPT connector that connects the outlet and inlet of adjacent filter mounts. For
more information on engine adapters or the installation of multiple by-pass systems
on one application, contact AMSOIL Technical Services at (715) 399-TECH.
General Installation Guidelines
Determine the location of a pressurized oil port on the engine.
Pressure ports are usually found on the main oil galley or in
close proximity to the full-flow filter head assembly. The oil flow
from this source should be plumbed into the inlet side of the
filter mount. The outlet will be directed to a low-pressure point
on the engine, typically a port located at or near the oil pan.
Detailed instructions are included with the Heavy-Duty By-Pass
Filtration System kit.
The AMSOIL Heavy-Duty By-Pass Filtration System saves
money by enabling the installation of an AMSOIL Ea By-Pass
Filter. Its heavy-duty design is ideal for equipment subjected to
extreme conditions. The ability to mount the system remotely
allows the equipment operator to more easily change filters,
adding convenience and reducing the amount of time necessary
to perform routine maintenance.
AMSOIL Ea Heavy-Duty By-Pass Filter
The AMSOIL Ea Heavy-Duty By-Pass Filter features the same
full-synthetic media as the rest of the Ea By-Pass Filter family. It
removes 98.7% of all contaminants two microns or larger (ISO
4548-12), and provides superior soot-removal efficiency at less
than one micron. It comes complete with a marine powder-coated
finish for long filter life, even in extreme conditions.
Increased Oil Capacity
The Ea Heavy-Duty By-Pass Filter increases the fluid system
capacity by approximately one gallon, depending on length of
hose and distance the filter is mounted from the engine. The
additional oil and extended filtration life provide improved oil
cooling and ensure equipment constantly runs on clean oil.
Engine efficiency is increased, providing extended engine life.
Extended Service Life
AMSOIL recommends changing the Ea Heavy-Duty By-Pass
Filter every other full-flow filter change up to 90,000 miles.
Extended oil drain intervals should always be accompanied
by an oil analysis program.
The Ea Heavy-Duty By-Pass Filter was designed for heavy-duty
applications. Its robust construction and superior filtration
performance provide maximum protection over extended drain
intervals, reducing downtime, increasing equipment life and
- Extended drain intervals
- Improved oil cooling
- Increased filtration capacity and life
- Increased fluid system capacity
- Efficient small particle and soot removal
- Extended engine life
- Maximum engine efficiency
- Removes particles less than one micron
- Convenient spin-on design
The AMSOIL Heavy-Duty By-Pass Filtration System and Ea
Heavy-Duty By-Pass Filter provide maximum filtration performance
for virtually all heavy-duty diesel applications, including
Class 6, 7 and 8 heavy-duty trucks, off-road equipment, buses,
generators, marine engines, logging and agricultural equipment.
AMSOIL PRODUCT WARRANTY
AMSOIL products are backed by a Limited Liability Warranty.
For complete information visit www.amsoil.com/warranty.aspx.