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

Attention!

INSTRUCTIONS FOR BONDING SOUND INSULATION are an essential part of these repair instructions and must be followed without fail.

Do not detach sound insulation in jerks (risk of damage).

Ensure watertightness of sound insulation after every repair (water ingress).

Necessary preliminary tasks:

Remove REAR DOOR TRIM PANEL

Attention!

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 1: Cutting Sealing Bead Of Sound Insulation Using Sharp Cutting Tool

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When refitting:

Damaged sound insulation must be replaced.

Lay butyl rope with ø 4 mm (sourcing reference: BMW Parts Department) onto the original butyl rope.

Replacement:

Remove residual butyl at the door and clean the adhesive area.

Air drying time: 1 minute

Attention!

Bonding surfaces 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. butyl rope (sourcing reference: BMW Parts Department) in specified adhesive area onto the sound insulation.

Position of sealing bead (1).

Feed out sound insulation (3) at cable (2) and remove.

Fig 2: Identifying Sound Insulation, Cable And Sealing Bead

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NOTE: A mark (2) is provided all round on the sound insulation (1).
Butyl rope (3) rests on or inside the marking (2).
Heat butyl rope (3) (hot air blower) and press sound insulation (1) on firmly all around.
Contact pressure with hand roller: approx. 20 N/cm²
Manual contact pressure: approx. 10 N/cm²

Fig 3: Identifying Butyl Rope And Sound Insulation

Courtesy of BMW OF NORTH AMERICA, INC.

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