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AMSOIL BMK-21 Spin-On By-Pass Oil Filter System

The BMK-21 is the Single Element Version of the BMK-22 Dual-Gard System

HE BMK-21 IS DESIGNED for those systems that do not need the extra filtration capacity of a dual by-pass set-up.

Engine wear is caused by dirt particles larger than 5 microns. The AMSOIL By-Pass Oil Filter removes particles as small as 1/10 of a micron, virtually eliminating engine wear. AMSOIL By-Pass Oil Filters filter all the oil in a six-quart system in about five minutes at an average engine speed equivalent to 45 mph.

Typical Installation Diagram for BMK-21 and BMK-22 Kits.

Typical Single By-Pass Installation

New Aluminum Billet Oil Fill and Oil Filter Caps for BMK21 By-Pass Filtration System

AMSOIL now offers new 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 Cummins Diesels
To ease installation of the BMK21 in 2004 and later model Dodge pickups equipped with the 5.9L Cummins diesel engine, AMSOIL offers the new 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 ease installation of the BMK21 in GM pickups equipped with the 6.6L Duramax diesel engine, AMSOIL offers an Oil Filter Sandwich Adapter (BK1201). the Sandwich Adapter is an anodized billet aluminum adapter that screws onto the OEM full-flow oil filter nipple located on the engine block. The full-flow filter is then spun onto the adapter. The Sandwich Adapter has an orifice that provides a high-pressure oil feed for the BMK-11. AMSOIL also offers an Aluminum Billet Oil Fill Cap for GM 6.6L Duramax diesels (BK1202) that eases the installation of the oil flow from the BMK11 back to the engine, as well as the 90-degree JIC Elbows (BP242).

  • BMK-21 Mounting Kit
  • EaBP90 Spin-On By-Pass Element
  • EaBP100 Spin-On By-Pass Element
  • EaBP110 Spin-On By-Pass Element

NOTE: Contact your AMSOIL Dealer or call the AMSOIL Technical Services Dept at 715-392-7101 if you have any questions about the systems above.

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