Hardening Time
WARNING: This page is about a different car, the 2013 BMW Z4, 2012 BMW Z4, 2011 BMW Z4, 2010 BMW Z4, and 2009 BMW Z4. However, it is still accessible from the selected car via links, so may be relevant.
The metal filler must be hardened using a short-wave infrared heater.
- 10 minutes at 50 °C - pre-hardening (avoid formation of bubbles/blisters and pores)
- 10 minutes at 75 °C - 1st stage hardening
- 10 minutes at 85 °C - 2nd stage hardening (avoid material shrinkage)
IMPORTANT:
In the first 10 minutes, the temperature of 50°C may not be exceeded. In contrast, a temperature that is too low may be equalized by extending the time.
NOTE:
When the heater is used for the first time, the distances that match the temperature must be determined.
Switch the heater on and change the distance until the surface temperature of the metal filler no longer changes for a period of 2 minutes. Measure the temperature with a temperature gauge. When optical temperature gauges are used (Epsilon value 0.92-0.95), the heater must be switched off briefly during the measurement. Record the measurement
Switch the heater on and change the distance until the surface temperature of the metal filler no longer changes for a period of 2 minutes. Measure the temperature with a temperature gauge. When optical temperature gauges are used (Epsilon value 0.92-0.95), the heater must be switched off briefly during the measurement. Record the measurement