AMSOIL BMK-12 User guide

A. Getting started
1. Check all parts against the parts list and inspect for damage.
2. Make sure you have the tools needed for the job.
Recommended tool list
5
⁄ 16 Allen wrench Torque wrench Drill
7
⁄ 16 wrench (2) Hammer
1
⁄ 4 drill bit
7
⁄ 8 wrench Center punch Adjustable filter wrench
9
⁄ 16 wrench
3. Because of the wide range of possible mounting configurations, hose and hose
fittings are not provided with this mount. Hose should meet or exceed SAE-
100R6 specifications, and have a minimum inside diameter of
1
⁄ 4 . The
mount itself has
3
⁄ 4 -16 straight threads and the adapter fittings provided are
3
⁄ 4 -16 straight x
1
⁄ 4 JIC. Read through instructions and determine which
plumbing arrangement best fits your application. Purchase hose and fit-
tings accordingly. Make certain hose fittings match the type of hose chosen.
Note: Hose and hose fittings are available from AMSOIL and your local
AMSOIL dealer. Refer to diagram D and the parts list for
1
⁄ 4 components
matched for use with this system.
B. Filter selection
Any of the 3 different sizes of the AMSOIL Spin-On By-Pass Oil Filter elements
may be used with this mount. Select the element size according to your vehi-
cle’s oil capacity.
Vehicle Oil Capacity Recommended Element
15 to 18 quarts use two EaBP-90
15 to 30 quarts use two EaBP-100
15 to 42 quarts use two EaBP-110
Service recommendations for these filters are listed later in these instructions.
Selecting a larger filter than recommended will extend the service interval, while
selecting a smaller filter than recommended will shorten the service interval.
C. Attaching the filter mount
1. Survey the engine compartment for possible mounting locations. Solid
structures such as the firewall, fender well, radiator support or frame are
normal locations. Refer to diagram A for minimum area requirements and con-
sider accessibility for servicing.
2. Note that the filter mount can be rotated 180° in its mounting brackets. This
allows the oil supply and return hoses to enter the mount on either the right
of left hand side. Choose the side that will minimize the need for bends in the
hoses or additional hose fittings. Refer to diagram B for preferred mounting
positions.
3. When the location has been determined, use the mounting template provided
to locate and mark mounting holes. This can be easily done with a center
punch and hammer.
4. With a
1
⁄ 4 drill bit, drill out the previously marked mounting holes and
attach the two piece mount bracket. Use the 4 - 1long
1
⁄ 4 bolts, nuts, small
washer and fender washers provided. Note the assembly diagram D for
details. Using two
7
⁄ 16 wrenches or socket, tightened to 8 foot pounds.
5. Apply thread sealant onto the “O” ring adapter fitting (BP-213) and the
restrictor assembly (BP-202) as noted in diagram C. Install the “O” ring adapter
fitting (BP-213) in the mount end adjacent to the arrows pointing IN. Install
the restrictor assembly (BP-202) in the mount end adjacent to the arrow point-
ing OUT. Using a
7
⁄ 8 wrench, tighten both fittings to 40-43 foot pounds.
Warning: The system is designed for partial/by-pass oil flow. Failure to
install the restrictor assembly (BP-202) can result in serious equipment
damage.
6. Apply thread sealant as noted in diagram C to the Allen head “O” ring plugs
(BP-191). Using a
5
⁄ 16 Allen head wrench, install plugs in remaining mount
ports and tighten to 40-43 foot pounds. Note: If optional oil sampling valve
is to be used, refer to diagram D and install in place of either Allen head “O”
ring plug.
7. Attach the filter mount to the mounting brackets using 4-1
1
⁄ 2 long
1
⁄ 4  bolts,
nuts and washers provided. Warning: The bolts must be installed so that the
nuts are on the side opposite the filter nipples. Failure to do this will result
in the bolts hitting the oil filters. Using two
7
⁄ 16 wrenches or socket, tighten
to 8 foot pounds.
D. Oil Supply
1. Usable oil pressure sources are available on many engine blocks. There are
openings into the oil channel through the side of the block and in the area of
the existing oil filter (s). Make sure it is an oil pressure opening by replacing
the plug with a gauge and turning the engine over, or by turning the engine
over with the plug out and watching for increased flow. DO NOT START
ENGINE WITHOUT PREPARATION TO CONTROL THE OIL FLOW. Install
appropriate fitting to accept your hose connector.
2. An alternate installation is to use the existing oil pressure sending unit.
Remove the oil pressure sending unit and install a street tee. Then re-install
the sending unit in one arm of the tee. Note: With this installation a slightly
lower oil pressure reading may register, indicating oil flow to the by-pass filter.
A change of 10% or less is not to be considered significant.
3. Install selected hose and hose fittings between the engine block or the
remaining arm of the tee and the filter mount port marked with the arrow point-
ing IN. Hose should be routed in a manner that avoids contact with sharp or
moving parts and minimizes bends. If bends in the hose can not be avoided,
make sure the bend is greater than the minimum radius recommended by the
hose manufacturer. Note: Bends should not start at the fitting. Refer to dia-
gram E for suggestions on proper hose routing.
4. To maintain hose position, plastic hose ties are advised.
E. Oil Return
1. Existing Porting Options: Most engines have an oil return opening in the
crankcase wall or oil pan, usually on the same side as the oil channel pressure
opening but somewhat lower. Remove the plug and determine that it is not a
IMPORTANT NOTICE
Read all instructions completely before attempting to install this unit.
Improper installation could result in serious system and/or equipment
damage. The installation of this system is not difficult, however, some
mechanical ability is necessary. If you are not comfortable with the instruc-
tions or have questions, do not attempt to install this system. Consult a
mechanic or contact AMSOIL INC. for further instructions or assistance.
WARNING: This filter system is not designed to replace the engine’s normal
full-flow filter. Do not attempt to install a by-pass filter element in place of
the existing full-flow filter. This unit was designed for heavy duty and indus-
trial equipment. For automotive and light duty truck applications consult your
AMSOIL dealer for the proper filter mount.
WARNING: Extreme care should be taken to avoid bodily harm during
installation. Before starting, ensure the engine is cool to avoid burns and never
work in the engine compartment area with the engine running.
Dual-Gard By-Pass Filter Mounting Kit
Installation and Servicing Instructions
BMK-12

*EaBP-110
131⁄2″
5″
9″
*EaBP-90
9″
*EaBP-100
10
1⁄2
″
Diagram A
MINIMUM AREA NEEDED FOR
DUAL MOUNT AND SPIN-ON OIL FILTER ELEMENTS
* Mount and element heights plus 1-inch removal clearance
Mounting Angle Diagram B
(Recommendations are the same right to left and front to back)
Mounting angle above horizontal is not recommended
Diagram C
SEALANT
AREA
NO SEALANT
ON FIRST 1-2 THREADS
Note: If Teflon tape is used, it should be wrapped no more
than 1
1
⁄ 2 to 2 turns in a clockwise direction when
viewed from the thread end.
Caution: More than two turns of tape may cause distortion or
cracking of the port.
Never back off (loosen) pipe threaded connectors to
achieve alignment.
pressurized port and offers an unrestricted flow to the oil pan. Install the appro-
priate fitting to accept your hose fitting. Attach and route hose, connecting
to the filter mount port marked with the arrow pointing OUT. This should be
the same port in which you previously installed the restrictor assembly
(BP-202).
2. New Porting Option: Where an installation requires a new hole (in oil pan
or valve cover), a self-tapping hollow bolt may be used. (The bolt is
available from AMSOIL. Order BP-40 Bolt and BP-41 Sealing Gasket.)
Note: The self-tapping hollow bolt should be used on stamped metal
components only.
a. For oil pan installation, mark a spot approximately 3above the
bottom of the pan. Avoid any pan formations that may suggest an inter-
nal obstruction. For the valve cover, choose a mounting location that
will not interfere with the movement of internal components and
away from the crankcase ventilation lines.
b. Using a center punch and hammer, punch a hole in the chosen loca-
tion between
1
⁄ 4 (.25) and
5
⁄ 16 (.3125) in diameter, Note: Do not drill
this hole as metal fillings are likely to enter the engine and it will pro-
duce a weaker attachment of the self-tapping hollow bolt.
c. Using a
9
⁄ 16 wrench, thread in the self-tapping hollow bolt (BP-40) and
sealing gasket (BP-41). As the bolt is tightened, make sure sealing gasket
is snug all the way around the bolt. Tighten bolt to 6-8 foot pounds.
d. Install the appropriate fitting to accept your hose fitting. Attach and
route hose, connecting to the filter mount port marked with the arrow
pointing OUT. Again this should be the same port in which you pre-
viously installed the restrictor assembly (BP-202).
3. Other Options: Use a hollow bolt (available locally) to replace a cap screw
holding such components as the fuel pump, timing case, or an inspection
cover. Remove the selected bolt and determine if it provides an unrestricted
passage to the oil pan. If so, install the hollow bolt. Route and connect hose
as previously described. You may also use the AMSOIL Oil Return Swivel
fitting (BP-89). See additional information on swivel fitting on last page.
4. Fill the selected AMSOIL By-Pass Filter elements with the same motor oil
being used in the vehicle. Lubricate the filter gasket with oil and spin fil-
ters onto mount. Tighten one full turn after filter gasket first contacts
mount, back off
1
⁄ 8 .
F. Start up procedures
1. Check that all fittings and hoses are securely attached, and that the hoses
are routed properly.
2. Check engine oil level. Fill to full mark if necessary.
3. Set vehicle parking brake. With transmission in park/neutral start the
engine and immediately check oil pressure. Note: Pressure may initially take
a moment or two to rise.
Caution: Carefully check for leaks at fittings, hoses and mount. If leaks are
observed, STOP ENGINE IMMEDIATELY, repair leaks and continue.
4. After engine has warmed, shut off and re-check engine oil level. Fill as
necessary.
5. Record vehicle mileage/operating hours and date of installation.
G. Periodic maintenance
1. Periodic visual inspection of the fittings and hoses is recommended.
Check for leaks, hose deterioration and cuts. Repair and/or replace as nec-
essary.
2. Properly sized, your AMSOIL By-Pass filters will last twice as long as your
regular full-flow filters. It is recommended however, filters be changed using
an oil analysis program.
3. To change the filter elements:
a. Ensure engine is off and use caution as the engine, oil and filters may
be hot and could result in an injury.
b. Using a filter wrench, remove the filter elements. Dispose of properly.
c. Clean the filter gasket contact areas on the mount with a clean lint
free rag.
d. Lubricate the new filter gaskets with clean oil or grease.
e. Fill filters as full as possible with engine oil.
f. Screw on new filters, tighten one full turn after filter gasket contacts
mount. Back off
1
⁄ 8 .
g. Start engine and check for leaks.
h. Check engine oil level, fill as needed.
i. Record vehicle mileage/operating hours for future reference.
ACCEPTABLE
ANGLE
ACCEPTABLE
ANGLE
PREFERRED MOUNTING ANGLE
HORIZONTAL
0°
20°
50°
130°
160°
180°

17
16
6
1
2
12
20
20
13
15
16
16
18
19
15
14
7
Oil Sending Unit
AMSOIL By-Pass Filter
(sold separately)
8
11
5
9
410
10
10
3
10
3
3
4
5
Diagram D
15⁄16
(1.3125)
(.25)
21⁄4
1⁄4
(2.25)
Item Description Qty. Part No.
1. Filter Mount Assembly 1 BK-193
2. Allen Head Plug 2 BP-191
3.
1
⁄ 4 -20x1Hex Head Bolt 4 BP-23
4.
1
⁄ 4 I.D. Washer 6 BP-21
5.
1
⁄ 4 -20 Self Locking Nuts 8 BP-22
6. “O” ring Fitting Adapter
3
⁄ 4 -16 to
1
⁄ 4 JIC 1 BP-213
7. Restrictor Assembly (.092)1BP-202
8. Mounting Bracket (top) 1 BP-194
9. Mounting Bracket (bottom) 1 BP-195
10.
1
⁄ 4 -20 x 1
1
⁄ 2 Hex Head Bolt 4 BP-185
11.
1
⁄ 4 I.D. Fender Washer 4 BP-186
Thread Sealant 1 BP-198
Instruction Sheet 1 BP-137
Optional Parts Available From AMSOIL and Your AMSOIL Dealer.
12. Oil Sampling Kit BK-13
13. Street “T” (
1
⁄ 8 x
1
⁄ 8 x
1
⁄ 8 )BP-33
14. 90° Street Elbow,
1
⁄ 8 BP-52
15. Fitting Adapter
1
⁄ 8 npt to
1
⁄ 4 JIC BP-208
16. Hose Fitting BP-207
17. Hose
1
⁄ 4 I.D. BP-216
18. Sealing Gasket BP-41
19. Self Tapping Hollow Bolt BP-40
20. Filter Elements (sold separately)
5.78long filter element EaBP-90
7.25long filter element EaBP-100
10.44long filter element EaBP-110
Parts and assembly list
Mounting Template

INSTALLING AN OIL SAMPLING PETCOCK
ON THE SPIN-ON BY-PASS:
Getting a clean and uncontaminated oil
sample is easy and simple when an oil
sampling pet-cock is installed into the
Spin-On By-Pass Oil Filter system. This
can be easily done by ordering a BK-13.
1. Provide for length change
In straight hose installations allow enough slack in
the hose line to provide for changes in length that will
occur when pressure is applied. This change in length
can be from +2% to -4%.
RIGHT
WRONG
4. Avoid mechanical strains
Use elbows and adapters in the installation to relieve
strain on the assembly, and to provide easier and
neater installations that are accessible for inspection and
maintenance.
WRONG RIGHT
7. Secure for protection
Install hose runs to avoid rubbing or abrasion. Use clamps to support long runs
of hose or to keep hose away from moving parts. It is important that the clamps
do not allow the hose to move. This movement will cause abrasion and pre-
mature hose failure.
RIGHT
WRONG
8. Avoid Improper Hose Movement
Make sure relative motion of the machine components produces bending rathers than twist-
ing of the hose. Hose should be routed so that the flex is in the same plane as the equipment
movement.
RIGHT
WRONG
5. Use proper bend radius
Keep the bend radius of the hose as large as possible
to avoid collapsing of the hose and restriction of flow.
Follow catalog specs on minimum bend radii.
RIGHT
WRONG
6. Use proper bend radius (cont.)
Maximum bend radius is measured on the inside bend
of the hose. To determine minimum bend, divide the
total distance between ends (B length) by 2. For exam-
ple 8 = 6, minimum bend radius = 3.
3.00
RADIUS
6.00
DIAMETER
B
2. Avoid twisting and orient properly
Do not twist hose during installation. This can be deter-
mined by the printed layline on the hose. Pressure
applied to a twisted hose can cause hose failure or
loosening of connections.
RIGHT
WRONG
3. Protect from hazardous environment
Keep hose away from hot parts. High ambient temper-
atures will shorten hose life. If you can not route it
away from the heat source, insulate it.
WRONG
RIGHT
Diagram E
AMSOIL INC., AMSOIL Bldg., Superior, WI [phone] BP-137 01/06
BY-PASS OIL FILTER RETURN-LINE FITTING:
A swivel fitting can be installed directly on
your oil filter cap for the oil return-line from the
AMSOIL By-Pass Filter. This fitting can be
used (in most cases) instead of the self-tapping
hollow bolt, which is usually installed on the
oil pan.
The Return-Line Fitting is made of a sturdy
brass-alloy and is constructed so that the top
of the fixture can swivel. This makes it easy to
take off your oil cap. The installation of the fit-
ting is simple and generally takes 5-10 min-
utes. Order BP-89. Be sure there is not a
crankcase vent in this area.
Oil filler cap
Return-Line
Swivel Fitting

BMK-12 PARTS IDENTIFICATION SHEET
BP-21
BP-22
BP-23
BP-185
BP-186
BP-191
BK-193
BP-194
BP-195
BP-202
BP-213
1
⁄ 4 I.D. WASHER
1
⁄ 4 NUT
1
⁄ 4 X 1" BOLT
1
⁄ 4 X 1
1
⁄ 2 
BOLT
1
⁄ 4 FENDER
WASHER
ALLEN HEAD
PLUG
FILTER MOUNT
ASSEMBLY
NOT TO SCALE
NOT TO SCALE
NOT TO SCALE
MOUNTING
BRACKET
TOP
MOUNTING
BRACKET
BOTTOM
RESTRICTOR
ASSEMBLY
“O” RING
FITTING
ADAPTER
(6)
(8)
(4)
(4)
(4)
(1)
(1)
(1)
(1)
(1)
(1)