51 48 070 Removing and installing/replacing sound insulation on left or right rear door

Necessary preliminary tasks:

If necessary, disconnect plug connection (1).

Using a scalpel, cut through sealing bead (3) of sound insulation (4) completely or if necessary partially.

Feed wires (2) out of sound insulation (4).

Fig 1: Identifying Sealing Bead Area

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IMPORTANT: When cutting through sealing bead (1), do not damage sound insulation (2) and if necessary cable.

With a suitable sharp cutting tool (3) cut through sealing bead (1) of sound insulation (2) in the area to be detached.

Fig 2: Cutting Sealing Bead Of Sound Insulation Using Sharp Cutting Tool

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Clean bonding area with adhesive remover (sourcing reference: BMW Parts Department).

Air drying time: 1 minute

IMPORTANT:

Adhesive areas must be dry and free of dust and grease.

Once it has been cleaned, do not touch the adhesive area with bare hands.

NOTE: Replacement:

Lay 6 mm dia. butyl rope (sourcing reference: BMW Parts Department) in specified adhesive area.

Heat butyl rope (hot-air blower) and press down firmly on sound insulation all round.

Contact pressure with hand roller: approx. 20 N/cm²

Manual contact pressure: approx. 10 N/cm²

NOTE: Firm thumb pressure has approx. 30 N/cm²

NOTE: Position of butylene tape (1) on sound insulation (2).

Fig 3: Positioning Of Butylene Tape On Sound Insulation

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NOTE: A marking (2) is provided all round on the sound insulation (1).
Butylene tape (3) rests on or inside the marking (2).

Fig 4: Identifying Sound Insulation And Butylene Tape

Courtesy of BMW OF NORTH AMERICA, INC.

Clean adhesive area on inner door panel with adhesive cleaner (sourcing reference: BMW Parts Service).

Air drying time: 1 minute

IMPORTANT: Adhesive areas must be dry and free of dust and grease.
Once it has been cleaned, do not touch the adhesive area with bare hands.

Lay 6 mm dia. butylene tape in a single row (sourcing reference: BMW Parts Service) in specified adhesive area on acoustic insulation.

Heat butylene tape (hot air blower) and press down firmly on sound insulation all round.

Contact pressure with hand roller: approx. 30 N/cm²

Manual contact pressure: approx. 10 N/cm 2

NOTE: Firm thumb pressure has approx. 50 N/cm²