Hi there,
The clutch plate may be sticking to the pressure plate or flywheel, this can be caused by oil contamination, the first thing I would check is the gear box oil level, if the front seal is leaking, gear box oil can contaminate the clutch causing this clutch hang up, when the car sits over night and as cold as you say the oil on the clutch combined with clutch dust will become very sticky and "glue"clutch together. A rear main engine seal can cause this as well, but if you don't notice any leaks under the car, I would be thinking front gear box oil seal.
Mark (mhpautos)
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Tuesday, November 13th, 2007 AT 4:17 PM