Check for Thermal Overload
WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
These quick information shall help to carry out a correct diagnosis in case of a customer complaint.
Through friction of clutch plate on the friction surface of the dual mass flywheel temperatures up to 200°C can arise during normal driving. At sliding clutch or through operating errors much higher temperatures can arise. These temperatures must not cause mandatory a reduced lifetime of the dual mass flywheel.
Possible indications for a high thermal load are:
- Tarnish (bluish) as well as local hotspots on friction surface
- Tarnish (bluish) near of mounting area and riveting area of clutch
If all other checkable features are well, the dual mass flywheel can stay in the vehicle.
Possible indications for a too high thermal load are:
- Cracks
- Fusion zones on friction surface (material smear)
- Scores in friction surface (for example through clutch lining riveting at destroyed or worn clutch plate)
- Tarnish (bluish) which reaches up to bearing area of dual mass flywheel
- Bluish discoloration of locating pins (3 locating pins in outer zone of dual mass flywheel)
In these cases the dual mass flywheel has to be replaced.