51 71... Sealing the units compartment partition wall, top center

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Necessary preliminary tasks:

Remove microfilter housing cover on LEFT and RIGHT

Remove gasket (1) for engine compartment lid.

Release screws (2, 4).

Remove partition wall (3).

If necessary, remove butyl residue from the body.

Fig 1: Identifying Gasket, Partition Wall And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Remove sponge rubber seal or butyl residue from area (1).

Fig 2: Identifying Rubber Seal Area

Courtesy of BMW OF NORTH AMERICA, INC.

Press protruding sponge rubber seal back into the joints (1) or cut it off.

Installation note:

Prepare 2 pieces of butyl rope 6-7 mm in dia. and 10 cm long.

Seal joints (1) with butyl tape.

Fig 3: Sealing Joints With Butyl Tape

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Apply butyl tape in area (1) along the component edge.

Compress the butyl tape evenly when inserting the partition wall.

Tighten down screws.

Reassemble the vehicle.

Fig 4: Identifying Rubber Seal Area

Courtesy of BMW OF NORTH AMERICA, INC.