BMW X3 Service & Repair Manual: Emc screws

(EMC = Electro-Magnetic Compatibility)

1. Purpose:

  • EMC SCREWS are used in the Bonding/Riveting repair method to re-establish bonding transition.
  • They assume the function of welded joints, which ensure transition to ground between the individual components.
  • The punch or blind rivets used in the repair do not guarantee permanent bonding transition between the individual components!
  • The EMC screws ensure the operational reliability and safety of the electrical/electronic components following repairs!

2. Procedure, aluminum front end:

  • Each welded joint which is opened must be replaced by at least 2 EMC screws.
  • Position the 2 screws on the flange on which the weld seam has been separated. In the event of partial replacement, position the screws in the area of the component overlap.
  • In the case of repairs using partial replacement, the number of EMC screws described in the repair instructions must be fitted.
  • Drill holes to a diameter of 4.2 mm and insert screws.
  • Seal EMC screws with PU sealing material (risk of corrosion).

3. Procedure, steel body:

  • Install the number of EMC screws described in the repair instructions.
  • Drill holes to a diameter of 4.2 mm and insert screws.
  • Seal EMC screws with PU sealing material (risk of corrosion).
    Corrosion protection
    NOTE: Following repairs, the corrosion protection work already begins with the correct removal of the underbody protection, anti-drumming laye ...

    Frame alignment control dimensions, body
    Dimensions in mm. Measurement tolerances: ≤ 1000 mm Â+- 1.5 mm ≥ 1000 mm Â+- 2.5 mm The control points shown serve to check the body a ...

    Other materials:

    BMW X3 Service & Repair Manual > Side frame and door pillars: Replacing A-pillar with reinforcement on left
    Procedure OBSERVE repair stage 3! Read contents of BODY, GENERAL. Spot-weld bonding is used on this vehicle. Observe specific PROCEDURE. Use only approved SPOT-WELDING APPARATUS for repairs. Place vehicle on straightening bench. Following new body parts are required : (1) A-pillar w ...

    BMW X3 Owners Manual

    BMW X3 Service & Repair Manual

    © 2017-2021 Copyright www.bmwx3tech.com - 0.0086