Re: 164 Slow clutch pedal return
Hi, and welcome! Always good to see a new 164 pilot on the forum!
I've done as muhut says and removed the damper. All it seems to do is make the clutch heavier! As for your problem, if you only do a small annual mileage, it could be the clutch centre plate binding on its splines. Unfortunately, the only way to sort this out is to lubricate them! You MIGHT be able to get a thin tube down the inspection hole at the top of the bellhousing and CAREFULLY squirt some spray grease on to the input shaft splines, but (a) I don't know if it can be done and (b) you'd run the risk of getting it onto the friction surfaces and ruining the clutch. Failing that, if you can't find any other cause, I'm afraid it's a gearbox-out job!
The return spring on the pedal is supposed to go over-centre. When the pedal is UP, it acts to keep it there. As soon as you have pushed the pedal a little way, it should go "over centre" and act so as to HELP depress the pedal.