BMW Glass Repair

March 29, 2014 | Reply More
Besides the structural factors, BMW windshields are where vital safety features such as Lane Departure Warning, Collision Warning with brake activation, Active Cruise Control, etc. get inputs. Better use only genuine BMW replacement glass.

Besides the structural factors, BMW windshields are where vital safety features such as Lane Departure Warning, Collision Warning with brake activation, Active Cruise Control, etc. get inputs. Better use only genuine BMW replacement glass.

The structural strength of the front and roofline of the passenger compartment depends heavily on the windshield and its bond with the A-Pillars, roof, and base where it connects to the upper frame rails. Replacement parts, installation materials, and procedures must meet safety standards.

The windshield is a major source of the strength of the front structure of the passenger compartment of a vehicle. A windshield that is attached securely to the A-Pillar, roof and upper frame rails provides the structural backbone that allows the crumple zones to absorb much of the energy generated in a front-end collision.

If there is any weakness in this front structure, impact energy could travel into the passenger compartment faster than airbags can deploy, and the steering wheel and dashboard could intrude farther and faster into the vehicle.

All cars on American roads are required to meet U.S. safety standards for automotive glass installation. This applies to both factory and aftermarket installation, so glass repair technicians need to understand exactly what is required for the glass in a given vehicle.

Adhesive

A dash-mounted interior moisture sensor measures the humidity level and automatically signals the climate control system to adjust the air conditioning if necessary to enhance passenger comfort.

A dash-mounted interior moisture sensor measures the humidity level and automatically signals the climate control system to adjust the air conditioning if necessary to enhance passenger comfort.

The urethane adhesive that bonds automotive glass to the vehicle structure is extremely strong, but installation requires that nothing interfere with the contact between the glass and adhesive and the adhesive and vehicle structural elements. Debris, corrosion, oils from the installer’s hands or clothing, and non-traditional contaminants (NTCs) such as mold release agents associated with the glass bending process, and silicone oil (a byproduct of the glass lamination process) can all inhibit adhesive bonding. Technicians must ensure that all such contaminants are removed as part of the cleaning and preparation of the area prior to placement of new glass.

Because stronger materials in modern vehicles allow the use of thinner metal even in structural components, corrosion damage must be assessed carefully. If corrosion is limited to orange discoloration, formation of light red spots on the metal, or light pitting, it can be removed with a wire wheel, media blasting, or a chemical rust remover. Apply primer to the bare metal to prep it for bonding to the new urethane adhesive.

Metal that has been perforated, even if only with microscopic holes, must be repaired or replaced by a professional collision repair technician. Any level of corrosion that has spread over a 24-square inch or larger area should also be addressed by a collision repair professional.

Some advanced electronics that attach to the glass require the use of special non-conductive or “High Modulus” urethane adhesive that will not interfere with signals or transmit harmful electric impulses through the device housing.

After the area is clean, trim down the existing adhesive bead to one-to-two

 

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Category: Structural & Body, the bimmer pub

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