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 > Driveline+Axles: Propeller shaft complete
TIGHTENING TORQUE SPECIFICATION - PROPELLER SHAFT COMPLETE
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Type
Thread
Tightening
specifications
1AZFront flexible
disc to
transmission
output flange
ZNS screws
and nuts All
versions
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Replace
screws and
nuts, jointing
torque ...