BMW 7 Series: Releasing Bonded Folded Seam Connections

Fig. 51: Releasing Bonded Folded Seam Connections

• Remove area (1) of bead edge on wheel arch bend with a one-hand angle grinder and rough grinding wheel.
• Heat area (2) with hot air blower.

CAUTION: Extract vapors and gases.

• Release connection flange with chisel.
• Grind adhesive residue (4) off wheel arch connection flange.

CAUTION: Wear a grinding dust mask.

• Remove remnants of sealing material in area (3).

REPAIR SOLUTION FOR STRAIGHT SHANK/HEXAGON RIVET NUT

Protection measures!

• Wear safety goggles
• Wear protective gloves

IMPORTANT: To prevent the material from tapering, do not drill out the rivet head.

1. Carefully spot-drill rivet head with a larger drill bit/countersink

Fig. 52: Drilling Rivet Head Using Larger Drill Bit/Countersink

IMPORTANT: Avoid paintwork damage

2. Knock rivet head away with a chisel

Fig. 53: Knocking Rivet Head

3. Drive through rivet shank into cavity, remove if necessary

Fig. 54: Identifying Rivet Shank

4. Clean component, eliminate paintwork damage if necessary

Fig. 55: Identifying Component

If the rivet shank can be removed:

IMPORTANT: To avoid corrosion, stop chips/debris by means of cavity sealing.

Follow INSTRUCTIONS ON CORROSION PROTECTION.

5. Preserving cavity

Fig. 56: Preserving Cavity

If the rivet shank cannot be removed:

WARNING: Risk of injury! Observe NOTES ON CAVITY FOAM.

IMPORTANT: To avoid corrosion and rattling noises, stop chips/debris and rivet nut shank with cavity foam.

Remove foam remnants with isohexane (benzine).

Fig. 57: Preserving Cavity

• Stop rivet shank by means of specific foaming
• Set rivet nut with hand rivet gun

NOTE: Fit rivet nut as quickly as possibly, ideally before the cavity foam hardens.

Hexagon/straight shank rivet nut (up to thread M8) with hand rivet gun ZS308

IMPORTANT: Follow manufacturer's operating instructions.

Make sure rivet nut correctly contacts component.

Fig. 58: Setting Rivet Nut With Hand Rivet Gun

Hexagon/straight shank rivet nut (up to thread M12) with hand rivet gun MB512

IMPORTANT: Follow manufacturer's operating instructions.

Make sure rivet nut correctly contacts component.

Fig. 59: Setting Rivet Nut With Hand Rivet Gun

REPAIR TECHNIQUES, REPAIR STAGE 1

All work which provides only for replacement of screwed/bolted components and planishing operations.

Repair techniques

• Straightening outer skin
• Straightening aluminium parts
• Straightening steel parts
• Information on metal filler
• Grinding
• Grinding steel parts
• Steel thread repairs

REPAIR TECHNIQUES, REPAIR STAGE 2

Repairs that are carried out by bonding and riveting without the use of a straightening bench.

Repair techniques

• Removing used part
• OPENING WELDED CONNECTIONS
• OPENING BRAZED CONNECTIONS
• OPENING RIVETED CONNECTION
• OPENING ADHESIVE BONDS
• GRINDING ALUMINIUM COMPONENTS
• GRINDING STEEL COMPONENTS
• REINFORCEMENT PLATE (BONDED)
• METAL FILLER
• OVERVIEW OF CONSUMABLES
• Notes on adhesive: NOTES ON ADHESIVE K1; NOTES ON ADHESIVE K2; NOTES ON ADHESIVE K3; NOTES ON ADHESIVE K4 and NOTES ON ADHESIVE K5
• BONDING ON PAINTED SURFACES
• BLIND RIVETS
• PUNCH RIVETS
• INSTALLING A CAVITY SEALING WITH 2-COMPONENT PU CAVITY FOAM
• EMC SCREWS
• REPAIRING PLASTIC PARTS
• BONDING GLASS PANES
• BLIND RIVET NUTS AND BOLTS

REPAIR TECHNIQUES, REPAIR STAGE 3

Repairs that are carried out by bonding and riveting with the use of a straightening bench or welding.

Repair techniques

• STRAIGHTENING ALUMINIUM COMPONENTS ON THE STRUCTURE
• STRAIGHTENING STEEL COMPONENTS ON THE STRUCTURE
• OPENING WELD JOINTS
• OPENING BRAZED CONNECTIONS
• OPENING RIVETED CONNECTIONS
• OPENING BONDED CONNECTIONS
• GRINDING ALUMINIUM COMPONENTS
• GRINDING STEEL COMPONENTS
• WELDING IN REINFORCEMENT PLATE (STEEL PLATE)
• WELDING STEEL COMPONENTS
• SPOT-WELD BONDING STEEL COMPONENTS
• SOLDERING STEEL COMPONENTS
• OVERVIEW OF CONSUMABLES
• NOTES ON ADHESIVE
• BONDING ALUMINIUM ON STEEL
• BONDING STEEL ON STEEL
• BLIND RIVETS
• PUNCH RIVETS
• INSTALLING A CAVITY SEALING WITH 2-COMPONENT PU CAVITY FOAM
• EMC SCREWS

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