Liquid Filter and Engine Subassembly Acting as a Support on which to Mount a Filter Canister

A mounting support for a filter canister provided with an external housing, said support having:

• a base intended to be connected to a lubrication circuit for an internal combustion engine, the base having an inlet for raw lubrication fluid, an outlet for purified lubrication fluid, and a conduit that communicates with one of said inlet and said outlet,
• an axial sleeve connected in leakproof manner to said conduit, said axial sleeve forming part of a metallic attachment interface for contact with the filter canister,
• wherein the base is of plastic material,
• and wherein said attachment interface comprises:
• said metal, axial sleeve, which defines an axial passageway that communicates by a first extremity of the axial sleeve with one of said inlet and said outlet of the base, a first annular sealing zone being formed between the base and the axial sleeve of the attachment interface, the axial sleeve having attachment means chosen from among threads, pins, or notches, provided on a second extremity, allowing the filter canister to be attached,
• a metal annular external portion integral with the axial sleeve and connected in leakproof manner to the base while forming a second annular sealing zone between the base and the attachment interface, at a distance from the first annual sealing zone, and
• at least one opening allowing liquid to circulate between the first and second sealing zones, said opening communicating with the other of said inlet and said outlet of the base.