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Home >> BMW >> 2009 >> 335d >> Repair and Diagnosis >> Collision >> General Collision Information >> COLLISION - BODY PANEL REPAIR (E90) 335d >> Body Repair General Information >> 4100... Repair Solution For Straight Shank/Hexagon Rivet Nut >> Protection Measures!

Protection Measures!

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 1: Spot Drilling Of Rivet Head
    G05476737Courtesy of BMW OF NORTH AMERICA, INC.
    IMPORTANT: Avoid paintwork damage
  2. Knock rivet head away with a chisel
    Fig 2: Knocking Rivet Head Using Chisel
    G05476738Courtesy of BMW OF NORTH AMERICA, INC.
  3. Drive through rivet shank into cavity, remove if necessary
    Fig 3: Identifying Rivet Shank
    G05476739Courtesy of BMW OF NORTH AMERICA, INC.
  4. Clean component, eliminate paintwork damage if necessary
    Fig 4: [Identifying Drilling Component]
    G05476732Courtesy of BMW OF NORTH AMERICA, INC.

    If the rivet shank can be removed: 

    IMPORTANT: To avoid corrosion, stop chips/swarf by means of cavity sealing.
    Follow INSTRUCTIONS ON CORROSION PROTECTION  .
  5. Preserving cavity
    Fig 5: Preserving Cavity
    G05476733Courtesy of BMW OF NORTH AMERICA, INC.

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/swarf and rivet nut shank with cavity foam.
Remove foam remnants with isohexane (benzine).
Fig 6: Preserving Cavity
G05476733Courtesy of BMW OF NORTH AMERICA, INC.
  1. Stop rivet shank by means of specific foaming
  2. Set rivet nut with hand rivet gun
    NOTE: Fit rivet nut as quickly as possibly, ideally before the cavity foam hardens.