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
