When using temperature-controlled infrared radiators, damage to adhesive bonds, paint and vehicle components can occur when drying spatula and filler.
The temperature sensors in the infrared radiator only operate reliably on large, even surfaces.
On small surfaces such as C-pillars or sills, often only a colder, adjacent area is measured.
This leads to actual surface temperatures of up to 130ºC, even if only 70ºC is set on the infrared radiator.
When the rear side walls are partially replaced by bonding and riveting, these high temperatures can lead to a visible pattern in the area of the joint.
Remedy: Check the surface temperatures on small component surfaces during the drying process with an external temperature sensor.
The general rule is: The surface temperatures must not exceed 85ºC.
IMPORTANT: Do not use infrared radiators on carbon parts! Risk of component destruction.
BMW X3 Service & Repair Manual > Side frame and door pillars: Replacing A-pillar with reinforcement on the left (with side member
attachment)
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 wi ...