AMSOIL BMK-21 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
Adjustable wrench Torque Wrench Drill
7
⁄ 16 9wrench Side Cutter
5
⁄ 16 9drill bit
1
⁄ 2 9wrench Utility knife Center punch
9
⁄ 16 9wrench Adjustable filter wrench Hammer
11
⁄ 16 9wrench Drain oil pan Vice
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 vehicle’s oil capacity.
Recommended
Vehicle Oil Capacity Element
Up to 9 quarts (5.78 9 long) EaBP-90
Up to 15 quarts (7.25
9 long) EaBP-100
Up to 21 quarts (10.44 9 long) EaBP-110
Service recommendations for these filters are listed later in these instructions.
Selecting a larger filter than recommended may extend the service interval, while select-
ing a smaller filter than recommended may 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. (Do not
mount on engine.) Refer to diagram B for minimum area requirements and consider
accessibility for servicing.
2. Refer to diagram A 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. Install adapter fittings (BP-208) on filter mount (BK-303) using provided thread
sealant as noted in diagram C. If desired, 90°angle fitting (BP-52) may also be used.
Using a
7
⁄ 16 9 wrench, tighten fittings 2-3 turns beyond finger tight. Keep in mind the
direction you wish to have the hoses intersect the mount.
5. With a
5
⁄ 16 9 drill bit, drill out the previously marked mounting holes and attach the
mount using the
5
⁄ 16 9 bolts, nuts, small washer and fender washers provided.
Bolts should be tightened to 16-18 foot pounds.
1
⁄ 2 9 wrenches or socket will be
required for this operation.
6. Fill the By-Pass Filter element with the same motor oil being used in the vehicle.
Lubricate the filter gasket with oil and spin filter onto mount. Tighten per instruc-
tions on the filter.
D. Oil Supply
1. Locate oil pressure sending unit (see diagram E). Remove unit and install “T” (BP-33)
using thread sealant as noted in diagram C and tightening 2-3 turns beyond finger tight.
NNoottee::See diagram G if oil pressure sending unit has a
1
⁄ 4 9 N.P.T. thread.
NNoottee::Special adapters may be needed to install “T” on some engines. Refer to the
Oil Pressure Sending Unit Information Guide. Occasionally, additional fittings may
be needed.
2. Reinstall sending unit in one opening of the “T” and a fitting adapter (BP-208) in
the other. Use thread sealant and tighten as noted in D.1. Use 90° Street Elbow
(BP-52) if necessary, keeping in mind the direction you wish the hose to intersect
the fitting.
3. Measure the amount of hose (BP-251) you will need to run from the Oil Pressure
Sending Unit “T” to the filter mount fitting labeled IINN. Additional length will be required
to accommodate engine movement during operation. Using a utility knife, squarely
cut the hose to the proper length.
NNoottee::The hose and fittings supplied with this kit have been matched to provide max-
imum performance and life expectancy. Interchanging with other types or brands
is nnoottrreeccoommmmeennddeeddand sshhoouullddbbeeaavvooiiddeedd. Should additional hose be required,
it may be obtained from your AMSOIL Dealer by ordering part number BP-251.
4. Install hose fittings (BP-261) on both ends of the hose following the instructions noted
in diagram F. Tools required are one
9
⁄ 16 9 wrench and one
11
⁄ 16 9 wrench or vise.
NNoottee::Do not use any form of thread sealant anywhere on the BP-261 hose fittings.
5. Route and connect the hose assembly making sure the hose does not contact any
hot or moving surfaces or sharp edges. Ensure a minimum of a
3
⁄ 4 9 bend radius is
maintained at all corners. Also, bends in hose should not begin at hose fittings. Using
a
9
⁄ 16 9 and
7
⁄ 16 9 wrench, tighten hose fitting swivel nut to 130-150 inch pounds or
from finger tight, rotate an additional 120° or
1
⁄ 3 of a turn. See diagrams D and H
for additional details.
E. Oil Return
Two options are available for returning the filtered oil to the engine. The first uses a
self-tapping hollow bolt (BP-40) and allows the oil to be returned to either the oil pan
or a rocker arm/valve cover. The second, which uses an optional swivel fitting (BP-89),
returns the oil to the oil filler cap already installed on your vehicle.
1. OOppttiioonnoonnee::select either the oil pan or valve cover for installation. NNoottee::The self-
tapping hollow bolt should be used on stamped metal components only. For oil pan
installation, mark a spot approximately 39above the bottom of the pan. Avoid any
pan formations that may suggest an internal obstruction. For the valve cover,
choose a mounting location that will not interfere with the movement of internal com-
ponents and away from the PVC pick-up.
2. Using a punch and hammer, punch a hole in the chosen location between
1
⁄ 4 9 (.259)
and
5
⁄ 16 9 (.31259)in diameter. NNoottee::Do not drill this hole as metal fillings are likely
to enter the engine and it will produce a weaker attachment of the self-tapping hollow
bolt.
3. Using a
9
⁄ 16 9 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
bolt. Tighten bolt to 6-8 foot pounds.
4. Using a
7
⁄ 16 9 and
9
⁄ 16 9 wrench, install fitting adapter (BP-208) in self-tapping hollow
bolt. Use a 90° Elbow (BP-52) if necessary keeping in mind the direction you wish
the hose to intersect the fitting. Use thread sealant provided as noted in diagram C.
Tighten 2-3 turns beyond finger tight. Proceed to item 10.
1. OOppttiioonnttwwoo::remove the existing oil filler cap. Be sure there is not a PVC pick-up in
this area.
2. In the center of the cap, drill a
3
⁄ 8 9 hole.
8. Install the long threaded portion of the optional return line swivel fitting (BP-89) into
the top of the oil filler cap. Secure with the provided self-locking nut and
9
⁄ 16 9 wrench.
3. Using thread sealant, install a fitting adapter (BP-208) into the return line swivel fit-
ting. Tighten 2-3 turns beyond finger tight. Reinstall oil filler cap on vehicle. A 90°
Elbow (BP-52) may also be used.
4. Measure the amount of hose (BP-251) you will need to run from the self-tapping
bolt or optional return line swivel fitting to the filter mount fitting labeled OOUUTT..
Additional length will be required to accommodate engine movement during oper-
ation. Using a utility knife, squarely cut the hose to the proper length.
5. Install hose fittings (BP-261) on both ends of the hose. Follow the instructions noted
on diagram F.
NNoottee::Do not use any form of thread sealant anywhere on the BP-261 hose fittings.
6. Route and connect the hose assembly making sure the hose does not contact any
hot or moving surfaces or sharp edges. Ensure a minimum of a
3
⁄ 4 9 bend radius
is maintained at all corners and hose bend does not begin at fitting. Tighten hose
IMPORTANT NOTICE
Read a
al ll linstructions 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 instructions or have questions,
d
do on no ot ta at tt te em mp pt tt to oi in ns st ta al ll lt th hi is ss sy ys st te em m. .Consult a mechanic or contact AMSOIL
INC. for further instructions or assistance.
If installing on a Japanese- or European-built vehicle utilizing M
Me et tr ri ic cor B B. .S S. .P P. .
threads, additional parts may be required. Consult step D.1 before you continue.
W
WA AR RN NI IN NG G: :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 exist-
ing full-flow filter.
W
WA AR RN NI IN NG G: :Extreme care should be taken to avoid bodily harm during installa-
tion. Before starting, ensure the engine is cool to avoid burns and n
ne ev ve er rwork
in the engine compartment area with the engine running.
Single Mount By-Pass Filter System
Installation and Servicing Instructions
BMK-21

SEALANT
AREA
NO SEALANT
ON FIRST 1-2 THREADS
8
9
3
12
13 11 14
1
*
EaBP-90
99
EaBP-100
10
1⁄2
9
EaBP-110
131⁄29
315⁄169
33⁄169
IN
IN OUT
OUT
Diagram B
MINIMUM AREA
NEEDED FOR
MOUNT AND OIL
FILTER ELEMENT
* Mount and element
heights plus 1-inch
removal clearance
Mounting Angle Diagram A
(Recommendations are the same right to left and front to back)
Mounting angle above horizontal is not recommended
Diagram C
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.
11⁄169
49⁄649
(1.066)
(.765)
11⁄169
(1.066)
(.3125)
5⁄169
fitting swivel nut to 130-150 inch pounds or from finger tight, rotate an additional 120° or
1
⁄ 3 of
a turn. See diagrams D and H for additional details.
8. Use plastic ties (BP-46) to secure hoses in position and away from damage. Trim ties, using side cutter.
NNoottee::Over tightening the plastic ties may cause the hose to collapse and restrict oil flow.
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. NNoottee::Pressure may initially take a moment or two to rise.
CCaauuttiioonn::Carefully check for leaks at fittings, hoses and mount. If leaks are observed, SSTTOOPP
EENNGGIINNEEIIMMMMEEDDIIAATTEELLYY,,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 dete-
rioration and cuts. Repair and/or replace as necessary.
2. Refer to Recommended Filter Change Interval chart for servicing intervals.
3. To change the filter element:
a. Ensure engine is off and use caution as the engine, oil and filter may be hot and could result
in an injury.
b. Using a filter wrench, remove the filter element. Dispose of properly.
c. Clean the filter gasket contact area on the mount with a clean, lint-free rag.
d. Lubricate the new filter gasket with clean oil.
e. Fill filter as full as possible with engine oil.
f. Screw on new filter, tighten per instructions on the filter.
g. Start engine and check for leaks.
h. Check engine oil level, fill as needed.
i. Record vehicle mileage/operating hours for future reference.
GOOD
ANGLE
ACCEPTABLE ACC EPTABLE
GOOD
ANGLE
PREFERRED MOUNTING ANGLE
HORIZONTAL
0°
20°
50°
130°
160°
180°
Parts and assembly list
Single Mount By-Pass Filter System (BMK-21)
Item Description Qty. Part No.
1. Oil Pressure Sending Unit (existing)
2. Filter Mount Assembly, Spin-On 1 BK-303
3. Fitting Adapter 4 BP-208
4.
5
⁄ 16 9Fender Washer 3 BP-205
5.
5
⁄ 16 9Flat Washer 3 BP-120
6.
5
⁄ 16 9-18 Self Locking Nut 3 BP-121
7.
5
⁄ 16 9-18 x 19Hex Head Bolt 3 BP-122
8.
1
⁄ 4 9I.D. Hose 88BP-251
9. Hose Fitting 4 BP-261
10. Street “T” (
1
⁄ 8 9 x
1
⁄ 8 9 x
1
⁄ 8 9) 1 BP-33
11. Straight “T” (
1
⁄ 4 9 x
1
⁄ 4 9 x
1
⁄ 4 9) 1 BP-34
12. 90° Street Elbow,
1
⁄ 8 94 BP-52
13. Bushing
1
⁄ 8 9 x
1
⁄ 4 91 BP-38
14. Nipple
1
⁄ 4 9 x 291 BP-39
15. Self Tapping Hollow Bolt 1 BP-40
16. Sealing Gasket 1 BP-41
Plastic Tie 2 BP-46
Thread Sealant 1 BP-198
Instruction Sheet 1 BP-83
Optional parts available from AMSOIL INC.
Filter Cap for 6.0L Ford BK-1101
Oil Fill Cap for 6.0L Ford BK-1102
Oil Filter Sandwich Adapter for GM Duramax BK-1201
Oil Fill Cap for GM Duramax BK-1202
Oil Fill Cap for Dodge Cummins BK-1301
Fitting Adapter
1
⁄ 8 9NPT –
1
⁄ 4 9JIC (stainless) BP-241
90° Elbow
1
⁄ 8 9NPT –
1
⁄ 4 9JIC BP-242
Oil Sampling Kit BP-67
Oil Return Swivel Fitting BP-89
Deluxe Oil Sampling Valve
1
⁄ 4 9NPT G-1570
Mounting Template
Diagram D
Minimum Bend Radius
(Actual size)
3
⁄ 4 9(.75)
1
⁄ 4 9I.D. Hose BP-251
Optional installation
at Oil Sending
Location (for
1
⁄ 4 9)
Diagram G

Installing an oil sampling petcock
on a spin-on by-pass:
Getting a clean and uncontaminated oil
sample is easy and simple when an oil sam-
pling pet-cock is installed into the Spin-On
By-Pass Oil Filter system. This can be easily
done by ordering a BP-67 Kit and installing
it into the by-pass system as shown here.
Oil Analysis:
1. If installing By-Pass Oil Filter with
AMSOIL Air Filter and 100% Synthetic
Engine Oil, in a pleasure vehicle we rec-
ommend the TRIGARD Oil Analysis
Program:
a. TRIGARD 1 (Stock No. ATG-01) is the starter pro-
gram. It contains registration material and 2
p
pr re ep pa ai id danalysis to check oil’s condition.
b. TRIGARD 2 (ATG-02) is for all subsequent oil
samples. Each ATG-02 also contains materials for
2 prepaid oil analysis.
2. For other oil analysis or commercial vehicles, order
G-1318 Oil Analysis Sampling Kits (in U.S., Canada).
Consult AMSOIL Technical Service for details.
By-Pass oil filter return-line fitting:
A swivel fitting can be installed directly on your oil filler
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 minutes. Order BP-89. Be
sure there is not a PCV pick-up in
this area.
IN
IN OUT
OUT
Oil Pressure Line
AMSOIL By-Pass Filter
*Elbow is optional
Oil Return Line
12 3
8
1
10
9312
9
16
315
8
9
3
7
5
4
6
2
*
*
39
Engine
Diagram E Diagram F
1. Place socket in vice and screw in
hose counter-clockwise until hose
bottoms. Back hose out
1
⁄ 2 turn.
2. Oil inside of hose and nipple threads
liberally with oil. Do not oil hose
cover.
3. Screw nipple assembly into socket
using wrench on nipple hex until
nipple hex shoulders against socket.
AMC (except Renault) All 1
AUDI Fox, 100, 4000, 5000 Diesel, Turbo All 3
Alfa Romeo
1600, 1750, 2000, Alfetta, Spider, Veloce All 3
Alfa Sud All 5
BMW
2500, 2800, 520, 1600-2, 2002 To 1975 3
320, 6333, 733, 530 1975-81 4
All models 1982-83 4
Buick (except Opel) All 1
Cadillac, All All 1
Chevrolet (except) All 1
Luv, 1800cc, Sprint, Spectrum 1976-88 2
Nova 1985-88 2
Chrysler, All All 1
Datsun, All All 2
Dodge (except) All 1
Colt To 1976 2
Colt, Challenger 1976-81 2
FIAT
Strada, 128, 131, 132, X 1⁄9 All 5
123 All 4
Ford (except) All 1
Courier, 1800cc eng. 1972-79 2
Honda, Prelude, Civic, Accord All 2
Lincoln, All All 1
Mazda, All All 2
Mercedes, Benz, All All 6
Mercury, All All 1
MG, MGA, MGB, Midget All 1
Oldsmobile, All All 1
Opel, GT1100, GT1900, Manta All 5
Peugot
404 (to 1976), 505 (after 1976), 504 All 5
Diesels, Turbo, 604, V-6 gas All 3
Plymouth (except) All 1
Champ, Arrow, Sapparo 1976-81 2
Pontiac (except) All 1
Firefly, Sunburst 1985-88 2
Porche
356, 6-V, 12V, 911, 912, 914C Carerra All 3
914-4 All 1
928, 944 All 6
Renault
LeCar, Alliance All 5
Fuego All 3
SAAB
Sonnet, 96, 900, Turbo All 1
99 All 3
Subaru, All All 2
Toyota, All All 2
Triumph, Spitfire, TR-7, TR-8 All 1
Volkswagen (except) All 3
Type 4 All 6
Volvo (except) All 3
Some 262c, 246GL, 265 GL-V6 Some 6
1. Adapter supplied in installation kit.
2.
1
⁄ 8 x 28 BSP to
1
⁄ 8 9NPT (Order AMSOIL BP-44 adapter kit).
3. 10 x 1MM to
1
⁄ 8 9or
1
⁄ 4 9NPT (Order AMSOIL BP-45 adapter kit).
4. 12 x 1.5MM to
1
⁄ 8 9or
1
⁄ 4 9NPT (Purchase from outside source).*
5. 14 x 1.5MM to
1
⁄ 8 9or
1
⁄ 4 9NPT (Purchase from outside source).
6. Information not available, contact vehicle manufacturer.
*Note: Two adapters required, 1 male to female, and 1 female to male.
Oil Sending Unit Information Guide
Adapter
Vehicle Year Info.
Adapter
Vehicle Year Info.
IN
IN OUT
OUT
18
Oil filler cap
Drill 3⁄8
9hole
Return-Line
Swivel Fitting
N
No ot te e: :When installing Self-
Tapping Hollow Bolt to oil
pan, locate approximately
39from bottom of sump.
Avoid installing on or near
any unusual pan forma-
tions which might indicate
an internal obstruction.

BMK-21 PARTS IDENTIFICATON SHEET
BP-33
BP-34
BP-38
BP-39
BP-40
BP-41
BP-52
BP-120
BP-46
BP-121
BP-122
BK-303
BP-205
BP-251
BP-261
BP-208
1
⁄ 8 9STREET
“T”
1
⁄ 4 9STRAIGHT
“T”
1
⁄ 8 9 x
1
⁄ 4 9
BUSHING
1
⁄ 4 9 x 29BUSHING
HOLLOW BOLT
SEALING
GASKET
90° ELBOW
1
⁄ 8 9
5
⁄ 16 9WASHER
PLASTIC TIE
5
⁄ 16 9NUT
5
⁄ 16 9x 19BOLT
FILTER MOUNT
5
⁄ 16 9FENDER
WASHER
1
⁄ 4 9I.D. HOSE
1
⁄ 4 9HOSE FITTING
FITTING ADAPTER
NOT TO SCALE
(1)
(1)
(1)
(1)
(1)
(1)
(4)
(3)
(2)
(3)
(3)
(1)
(3)
(8)
(4)
(4)
AMSOIL BP - 251

AMSOIL By-Pass Warranty
AMSOIL INC. warrants each AMSOIL By-pass System to be free from defects
in material and workmanship for a period of one year from the time of purchase.
THIS WARRANTY DOES NOT APPLY IF THE BY-PASS SYSTEM HAS BEEN
IMPROPERLY INSTALLED, ABUSED, DAMAGED, USED IN COMPETITIVE
RACING OR ON MODIFIED ENGINES OR IF USED IN ANY AIRCRAFT
OF AVIATION APPLICATION. AMSOIL INC. DOES NOT MAKE BY-PASS
RECOMMENDATIONS FOR AIRCRAFT OR AVIATION USE. If your AMSOIL
By-pass System is found to be defective within a period of one year from the time of
purchase, AMSOIL INC. will replace the By-pass System or defective component
with another AMSOIL By-pass System or component or refund or credit the AMSOIL
Dealer’s or customer’s account. AMSOIL will reimburse you for the reasonable costs of
the parts and labor required to repair your engine or equipment to the extent the damage
was solely attributable to a defect in your AMSOIL By-pass System. In order to obtain
engine or equipment repairs under this warranty the Dealer or customer must directly
contact AMSOIL Technical Service, AMSOIL INC., 1101 Susquehanna Ave., Superior
WI 54880, Tel: 715-399-TECH (8324). The customer must also allow the AMSOIL
Technical Services Department to examine the By-pass System or Filter(s) and, if
required, the engine or equipment, to determine the extent of damage and whether it
was caused by a defectiveAMSOIL By-pass System or Filter(s). The By-pass System
and Filter(s) must be returned, in its original, undamaged condition, to the AMSOIL
Technical Service Department for examination. This warranty is exclusive of any
other warranty, express or implied. AMSOIL BY-PASS SYSTEMS EXPRESSLY
DISCLAIMS, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
MERCHANTIBILITY AND OF FITNESS FOR A PARTICULAR PURPOSE.
The foregoing states the entire AMSOIL By-pass System’s exclusively liability and the
buyer’s exclusive and sole remedy for any damages or claim made in connection with
the sale of an AMSOIL By-pass System. AMSOIL By-pass Systems shall in no event
be liable for any special, incidental, or consequential damages whatsoever, except those
spefically provided for in this warranty. Some states do not allow the exclusion or
limitation of incidental or consequential damages, so the abovelimitations or exclusion
may not apply to you. This warranty gives you specific legal rights and you may also
have other rights, which vary from state to state.